Attachment Exhibit A

This document pretains to SES-MFS-20171127-01276 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2017112701276_1307939

                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                                   Prodelin 1123

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value          Unit     Symbol
Atenna Diameter:                                     1.2            m         D
Antenna Transmit Gain:                              43.20          dBi        G
Trasmit Frequency:                                  14250          MHz        f
Feed Flange Diameter:                               13.30          cm         d
Power Input to the Antenna:                         21.60          W          P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value          Unit     Symbol        Formula
                                                                       2                  2
Anenna Surface Area:                                 1.13          m           A      πD /4
                                                                        2                 2
Area of Feed Flange:                               138.93          cm          a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.65                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      20892.96                     g      10
Wavelength:                                        0.0211          m           λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                17.100         m      Rnf = D /(4λ)
Distance to Far Field:                              41.040         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        17.100         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.978      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.132      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.978      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                    621.9      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     7.639      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.910      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.132          Satisfies FCC Requirements
Near Field Calculation                              4.978          Satisfies FCC Requirements
Transition Region                                   4.978          Satisfies FCC Requirements
Region between Main and Subreflector                621.9              Exceeds Limitations
Main Reflector Region                               7.639              Exceeds Limitations
Region between Main Reflector and Ground            1.910          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                                   Prodelin 1132

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value          Unit     Symbol
Atenna Diameter:                                     1.2            m         D
Antenna Transmit Gain:                              43.30          dBi        G
Trasmit Frequency:                                  14125          MHz        f
Feed Flange Diameter:                               14.60          cm         d
Power Input to the Antenna:                         20.80          W          P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value          Unit     Symbol        Formula
                                                                       2                  2
Anenna Surface Area:                                 1.13          m           A      πD /4
                                                                        2                 2
Area of Feed Flange:                               167.42          cm          a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.68                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      21379.62                     g      10
Wavelength:                                        0.0212          m           λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                16.950         m      Rnf = D /(4λ)
Distance to Far Field:                              40.680         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        16.950         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.992      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.138      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.992      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                    497.0      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     7.356      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.839      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.138          Satisfies FCC Requirements
Near Field Calculation                              4.992          Satisfies FCC Requirements
Transition Region                                   4.992          Satisfies FCC Requirements
Region between Main and Subreflector                497.0              Exceeds Limitations
Main Reflector Region                               7.356              Exceeds Limitations
Region between Main Reflector and Ground            1.839          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                                   Prodelin 1134

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value          Unit     Symbol
Atenna Diameter:                                     1.2            m         D
Antenna Transmit Gain:                              43.00          dBi        G
Trasmit Frequency:                                  14250          MHz        f
Feed Flange Diameter:                               14.60          cm         d
Power Input to the Antenna:                         22.70          W          P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value          Unit     Symbol        Formula
                                                                       2                  2
Anenna Surface Area:                                 1.13          m           A      πD /4
                                                                        2                 2
Area of Feed Flange:                               167.42          cm          a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.62                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      19952.62                     g      10
Wavelength:                                        0.0211          m           λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                17.100         m      Rnf = D /(4λ)
Distance to Far Field:                              41.040         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        17.100         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.996      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.140      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.996      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                    542.4      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     8.028      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          2.007      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.140          Satisfies FCC Requirements
Near Field Calculation                              4.996          Satisfies FCC Requirements
Transition Region                                   4.996          Satisfies FCC Requirements
Region between Main and Subreflector                542.4              Exceeds Limitations
Main Reflector Region                               8.028              Exceeds Limitations
Region between Main Reflector and Ground            2.007          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                                   Prodelin 1984

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value          Unit     Symbol
Atenna Diameter:                                    0.98            m         D
Antenna Transmit Gain:                              41.30          dBi        G
Trasmit Frequency:                                  14125          MHz        f
Feed Flange Diameter:                               14.60          cm         d
Power Input to the Antenna:                         14.60          W          P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value          Unit     Symbol        Formula
                                                                       2                  2
Anenna Surface Area:                                 0.75          m           A      πD /4
                                                                        2                 2
Area of Feed Flange:                               167.42          cm          a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.64                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      13489.63                     g      10
Wavelength:                                        0.0212          m           λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                11.305         m      Rnf = D /(4λ)
Distance to Far Field:                              27.131         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        11.305         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.970      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.129      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.970      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                    348.8      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     7.742      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.936      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.129          Satisfies FCC Requirements
Near Field Calculation                              4.970          Satisfies FCC Requirements
Transition Region                                   4.970          Satisfies FCC Requirements
Region between Main and Subreflector                348.8              Exceeds Limitations
Main Reflector Region                               7.742              Exceeds Limitations
Region between Main Reflector and Ground            1.936          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                                   Prodelin 1251

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value          Unit     Symbol
Atenna Diameter:                                     2.4            m         D
Antenna Transmit Gain:                              49.20          dBi        G
Trasmit Frequency:                                  14125          MHz        f
Feed Flange Diameter:                               14.60          cm         d
Power Input to the Antenna:                         56.00          W          P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value          Unit     Symbol        Formula
                                                                       2                  2
Anenna Surface Area:                                 4.52          m           A      πD /4
                                                                        2                 2
Area of Feed Flange:                               167.42          cm          a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.66                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      83176.38                     g      10
Wavelength:                                        0.0212          m           λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                67.800         m      Rnf = D /(4λ)
Distance to Far Field:                             162.720         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        67.800         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     3.268      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      1.400      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  3.268      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                   1338.0      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     4.951      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.238      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               1.400          Satisfies FCC Requirements
Near Field Calculation                              3.268          Satisfies FCC Requirements
Transition Region                                   3.268          Satisfies FCC Requirements
Region between Main and Subreflector               1338.0              Exceeds Limitations
Main Reflector Region                               4.951          Satisfies FCC Requirements
Region between Main Reflector and Ground            1.238          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                               SkyWare Global 123

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value        Unit       Symbol
Atenna Diameter:                                     1.2          m           D
Antenna Transmit Gain:                              43.30         dBi         G
Trasmit Frequency:                                  14300        MHz          f
Feed Flange Diameter:                               10.80         cm          d
Power Input to the Antenna:                         21.30         W           P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value        Unit       Symbol        Formula
                                                                      2                   2
Anenna Surface Area:                                 1.13         m            A      πD /4
                                                                      2                   2
Area of Feed Flange:                                91.61        cm            a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.66                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      21379.62                     g      10
Wavelength:                                        0.0210         m            λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                17.160         m      Rnf = D /(4λ)
Distance to Far Field:                              41.184         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        17.160         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.988      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.137      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.988      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                    930.0      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     7.533      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.883      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.137          Satisfies FCC Requirements
Near Field Calculation                              4.988          Satisfies FCC Requirements
Transition Region                                   4.988          Satisfies FCC Requirements
Region between Main and Subreflector                930.0              Exceeds Limitations
Main Reflector Region                               7.533              Exceeds Limitations
Region between Main Reflector and Ground            1.883          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                         SkyWare Global 183 (SPA 1800)

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value        Unit       Symbol
Atenna Diameter:                                     1.8          m           D
Antenna Transmit Gain:                              46.80         dBi         G
Trasmit Frequency:                                  14300        MHz          f
Feed Flange Diameter:                                8.57         cm          d
Power Input to the Antenna:                         48.20         W           P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value        Unit       Symbol        Formula
                                                                      2                   2
Anenna Surface Area:                                 2.54         m            A      πD /4
                                                                      2                   2
Area of Feed Flange:                                57.68        cm            a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.66                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      47863.01                     g      10
Wavelength:                                        0.0210         m            λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                38.610         m      Rnf = D /(4λ)
Distance to Far Field:                              92.664         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                        38.610         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.991      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.138      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.991      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                   3342.4      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     7.577      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.894      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.138          Satisfies FCC Requirements
Near Field Calculation                              4.991          Satisfies FCC Requirements
Transition Region                                   4.991          Satisfies FCC Requirements
Region between Main and Subreflector               3342.4              Exceeds Limitations
Main Reflector Region                               7.577              Exceeds Limitations
Region between Main Reflector and Ground            1.894          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3


                                                                                                 RigNet Satcom, Inc.
                                                                                                   EXHIBIT A

                                           Radiation Hazard Study

                                          SkyWare Global 845 (SF 840)

This study analyzes the potential Radio Frequency (RF) human exposure levels caused by the Electro Magnetic
(EM) fields of the above-captioned antenna. The mathematical analysis performed below complies with the
methods described in the Federal Communications Commission Office of Engineering and Technology Bulletin
No. 65 (1985 rev. 1997) R&O 96-326.

Maximum Permisible Exposure
There are two separate levels of exposure limits. The first applies to persons in the general population who are
in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According
to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as
follows:
            • General Population / Uncontrolled Exposure 1.0 mW/cm2
            • Occupational / Controlled Exposure 5.0 mW/cm2
The purpose of this study is to determine the power flux density levels for the earth station under study as
compared with the MPE limits. This comparison is done in each of the following regions:
            1. Far-field region
            2. Near-field region
            3. Transition region
            4. The region between the feed and the antenna surface
            5. The main reflector region
            6. The region between the antenna edge and the ground


Input Parameters
The following input parameters were used in the calculations:

Parameter                                           Value        Unit       Symbol
Atenna Diameter:                                    0.84          m           D
Antenna Transmit Gain:                              40.30         dBi         G
Trasmit Frequency:                                  14300        MHz          f
Feed Flange Diameter:                                8.25         cm          d
Power Input to the Antenna:                         10.20         W           P

Calculated Parameters
The following values were calculated using the above input parameters and the corresponding formulas.

Parameter                                           Value        Unit       Symbol        Formula
                                                                      2                   2
Anenna Surface Area:                                 0.55         m            A      πD /4
                                                                      2                   2
Area of Feed Flange:                                53.46        cm            a      πd /4
                                                                                          2      2   2
Antenna Efficiency:                                  0.68                      η      Gλ /( π D )
                                                                                         G /10
Gain Factor:                                      10715.19                     g      10
Wavelength:                                        0.0210         m            λ      300/ f




                                                       1 of 3


                                                                                                RigNet Satcom, Inc.
                                                                                                  EXHIBIT A

Behavior of EM Fields as a Function of Distance
The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna.
These characteristics are analyzed in three primary regions: the near-field region, the far-field region and the
transition region. Of interest also are the region between the antenna main reflector and the subreflector, the
region of the main reflector area and the region between the main reflector and ground.




Figure 1. EM Fields as a Function of Distance

For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near-field, far-
field and transition region distances are calculated as follows:

Parameter                                           Value         Unit    Formula
                                                                                  2
Near Field Distance:                                 8.408         m      Rnf = D /(4λ)
Distance to Far Field:                              20.180         m      Rff = 0.60D2/(λ)
Distance of Trasition Region                         8.408         m      Rt = Rnf

The distance in the transition region is between the near and far fields. Thus, Rnf ≤ Rt ≤ Rff . However, the
power density in the transition region will not exceed the power density in the near-field. Therefore, for purposes
of the present analysis, the distance of the transition region can equate the distance to the near-field.


Power Flux Density Calculations
The power flux density is considered to be at a maximum through the entire length of the near-field. This region
is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition
region and the far-field, the power density decreases inversely with the square of the distance. The following
equations are used to calculate power density in these regions.




                                                       2 of 3


                                                                                                  RigNet Satcom, Inc.
                                                                                                    EXHIBIT A


Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density in the Near-Field                     4.986      mW/cm          S nf      16.0 η P /(πD 2)
                                                                        2
Power Density in the Far-Field                      2.136      mW/cm          S ff      GP /(4π R ff2)
                                                                        2
Power Density in the Trans. Region                  4.986      mW/cm           St       Snf R nf /(R t)

The region between the main reflector and the subreflector is confined within a conical shape defined by the feed
assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows:



Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at the Feed Flange                    763.2      mW/cm          S fa      4P / a

The power density in the main reflector is determined similarly to the power density at the feed flange; except that
the area of the reflector is used.

Parameter                                           Value        Unit       Symbol      Formula
                                                                        2
Power Density at Main Reflector                     7.362      mW/cm        S surface   4P / A

The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is
calculated as follows:

Parameter                                           Value        Unit       Symbol      Formula
Power Density between Reflector and Ground          1.841      mW/cm2         Sg        P /A

Table 1 summarizes the calculated power flux density values for each region. In a controlled environment, the
only regions that exceed FCC limitations are shown below. These regions are only accessible by trained
technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas.


                                                                    Controlled Environment
Power Densities                                   mW/cm2
                                                                           (5 mW/cm2)
Far Field Calculation                               2.136          Satisfies FCC Requirements
Near Field Calculation                              4.986          Satisfies FCC Requirements
Transition Region                                   4.986          Satisfies FCC Requirements
Region between Main and Subreflector                763.2              Exceeds Limitations
Main Reflector Region                               7.362              Exceeds Limitations
Region between Main Reflector and Ground            1.841          Satisfies FCC Requirements
Table 1. Power Flux Density for Each Region

In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation
procedures, meets the guidelines specified in 47 C.F.R. § 1.1310.




                                                      3 of 3



Document Created: 2017-11-27 17:18:32
Document Modified: 2017-11-27 17:18:32

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