Attachment Exhibit A

This document pretains to SES-MOD-20150611-00354 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2015061100354_1092308

RigNet Satcom, Inc. EXHIBIT A Radiation Hazard Study Intellian v100 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: 1.03 m D Antenna Transmit Gain: 41.60 dBi G Trasmit Frequency: 14125 MHz f Feed Flange Diameter: 5.20 cm d Power Input to the Antenna: 16.00 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: 0.83 m A πD /4 2 2 Area of Feed Flange: 21.24 cm a πd /4 2 2 2 Antenna Efficiency: 0.62 η Gλ /( π D ) G /10 Gain Factor: 14454.40 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: 12.488 m Rnf = D /(4λ) Distance to Far Field: 29.970 m Rff = 0.60D2/(λ) Distance of Trasition Region 12.488 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 4.783 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 2.049 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 4.783 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 3013.6 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 7.681 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 1.920 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 2.049 Satisfies FCC Requirements Near Field Calculation 4.783 Satisfies FCC Requirements Transition Region 4.783 Satisfies FCC Requirements Region between Main and Subreflector 3013.6 Exceeds Limitations Main Reflector Region 7.681 Exceeds Limitations Region between Main Reflector and Ground 1.920 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 Intellian V130 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: 1.25 m D Antenna Transmit Gain: 43.20 dBi G Trasmit Frequency: 14125 MHz f Feed Flange Diameter: 6.70 cm d Power Input to the Antenna: 16.00 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: 1.23 m A πD /4 2 2 Area of Feed Flange: 35.26 cm a πd /4 2 2 2 Antenna Efficiency: 0.61 η Gλ /( π D ) G /10 Gain Factor: 20892.96 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: 18.392 m Rnf = D /(4λ) Distance to Far Field: 44.141 m Rff = 0.60D2/(λ) Distance of Trasition Region 18.392 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 3.187 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 1.365 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 3.187 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 1815.3 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 5.215 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 1.304 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 1.365 Satisfies FCC Requirements Near Field Calculation 3.187 Satisfies FCC Requirements Transition Region 3.187 Satisfies FCC Requirements Region between Main and Subreflector 1815.3 Exceeds Limitations Main Reflector Region 5.215 Exceeds Limitations Region between Main Reflector and Ground 1.304 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 Sailor 800 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: 0.83 m D Antenna Transmit Gain: 40.60 dBi G Trasmit Frequency: 14250 MHz f Feed Flange Diameter: 5.00 cm d Power Input to the Antenna: 6.00 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: 0.54 m A πD /4 2 2 Area of Feed Flange: 19.63 cm a πd /4 2 2 2 Antenna Efficiency: 0.75 η Gλ /( π D ) G /10 Gain Factor: 11481.54 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: 8.181 m Rnf = D /(4λ) Distance to Far Field: 19.634 m Rff = 0.60D2/(λ) Distance of Trasition Region 8.181 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 3.320 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 1.422 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 3.320 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 1222.3 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 4.436 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 1.109 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 1.422 Satisfies FCC Requirements Near Field Calculation 3.320 Satisfies FCC Requirements Transition Region 3.320 Satisfies FCC Requirements Region between Main and Subreflector 1222.3 Exceeds Limitations Main Reflector Region 4.436 Satisfies FCC Requirements Region between Main Reflector and Ground 1.109 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 Sailor 900B 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: 1.03 m D Antenna Transmit Gain: 41.40 dBi G Trasmit Frequency: 14250 MHz f Feed Flange Diameter: 5.30 cm d Power Input to the Antenna: 8.00 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: 0.83 m A πD /4 2 2 Area of Feed Flange: 22.06 cm a πd /4 2 2 2 Antenna Efficiency: 0.58 η Gλ /( π D ) G /10 Gain Factor: 13803.84 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: 12.598 m Rnf = D /(4λ) Distance to Far Field: 30.236 m Rff = 0.60D2/(λ) Distance of Trasition Region 12.598 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 2.244 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 0.961 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 2.244 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 1450.5 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 3.840 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 0.960 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 0.961 Satisfies FCC Requirements Near Field Calculation 2.244 Satisfies FCC Requirements Transition Region 2.244 Satisfies FCC Requirements Region between Main and Subreflector 1450.5 Exceeds Limitations Main Reflector Region 3.840 Satisfies FCC Requirements Region between Main Reflector and Ground 0.960 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 SeaTel 9711 (C-band) 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: 41.70 dBi G Trasmit Frequency: 6180 MHz f Feed Flange Diameter: 5.60 cm d Power Input to the Antenna: 92.00 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: 24.63 cm a πd /4 2 2 2 Antenna Efficiency: 0.61 η Gλ /( π D ) G /10 Gain Factor: 14791.08 g 10 Wavelength: 0.0485 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: 29.664 m Rnf = D /(4λ) Distance to Far Field: 71.194 m Rff = 0.60D2/(λ) Distance of Trasition Region 29.664 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 4.987 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 4.987 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 14941.1 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 8.135 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 2.034 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 4.987 Satisfies FCC Requirements Transition Region 4.987 Satisfies FCC Requirements Region between Main and Subreflector 14941.1 Exceeds Limitations Main Reflector Region 8.135 Exceeds Limitations Region between Main Reflector and Ground 2.034 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 SeaTel 6012 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: 1.5 m D Antenna Transmit Gain: 45.10 dBi G Trasmit Frequency: 14250 MHz f Feed Flange Diameter: 5.60 cm d Power Input to the Antenna: 33.00 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: 1.77 m A πD /4 2 2 Area of Feed Flange: 24.63 cm a πd /4 2 2 2 Antenna Efficiency: 0.65 η Gλ /( π D ) G /10 Gain Factor: 32359.37 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: 26.719 m Rnf = D /(4λ) Distance to Far Field: 64.125 m Rff = 0.60D2/(λ) Distance of Trasition Region 26.719 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 4.824 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 2.067 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 4.824 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 5359.3 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 7.470 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 1.867 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 2.067 Satisfies FCC Requirements Near Field Calculation 4.824 Satisfies FCC Requirements Transition Region 4.824 Satisfies FCC Requirements Region between Main and Subreflector 5359.3 Exceeds Limitations Main Reflector Region 7.470 Exceeds Limitations Region between Main Reflector and Ground 1.867 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 SeaTel 9711 (C-band) 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: 41.70 dBi G Trasmit Frequency: 6180 MHz f Feed Flange Diameter: 5.60 cm d Power Input to the Antenna: 92.00 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: 24.63 cm a πd /4 2 2 2 Antenna Efficiency: 0.61 η Gλ /( π D ) G /10 Gain Factor: 14791.08 g 10 Wavelength: 0.0485 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: 29.664 m Rnf = D /(4λ) Distance to Far Field: 71.194 m Rff = 0.60D2/(λ) Distance of Trasition Region 29.664 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 4.987 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 4.987 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 14941.1 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 8.135 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 2.034 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 4.987 Satisfies FCC Requirements Transition Region 4.987 Satisfies FCC Requirements Region between Main and Subreflector 14941.1 Exceeds Limitations Main Reflector Region 8.135 Exceeds Limitations Region between Main Reflector and Ground 2.034 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 SeaTel 9711 (Ku-band) 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: 49.30 dBi G Trasmit Frequency: 14250 MHz f Feed Flange Diameter: 18.00 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: 254.47 cm a πd /4 2 2 2 Antenna Efficiency: 0.66 η Gλ /( π D ) G /10 Gain Factor: 85113.80 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: 68.400 m Rnf = D /(4λ) Distance to Far Field: 164.160 m Rff = 0.60D2/(λ) Distance of Trasition Region 68.400 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 3.286 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 1.407 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 3.286 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 880.3 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 1.407 Satisfies FCC Requirements Near Field Calculation 3.286 Satisfies FCC Requirements Transition Region 3.286 Satisfies FCC Requirements Region between Main and Subreflector 880.3 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 SeaTel 9797 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: 48.45 dBi G Trasmit Frequency: 14250 MHz f Feed Flange Diameter: 13.00 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: 132.73 cm a πd /4 2 2 2 Antenna Efficiency: 0.55 η Gλ /( π D ) G /10 Gain Factor: 69984.20 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: 68.400 m Rnf = D /(4λ) Distance to Far Field: 164.160 m Rff = 0.60D2/(λ) Distance of Trasition Region 68.400 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 2.702 mW/cm S nf 16.0 η P /(πD 2) 2 Power Density in the Far-Field 1.157 mW/cm S ff GP /(4π R ff2) 2 Power Density in the Trans. Region 2.702 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 1687.6 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 1.157 Satisfies FCC Requirements Near Field Calculation 2.702 Satisfies FCC Requirements Transition Region 2.702 Satisfies FCC Requirements Region between Main and Subreflector 1687.6 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


Document Created: 2015-06-08 18:19:19
Document Modified: 2015-06-08 18:19:19
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC