Attachment RadHaz Reports

This document pretains to SES-MOD-20131108-00955 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2013110800955_1019285

EXHIBIT WITH RADIATION HAZARD REPORTS INCLUDES RADIATION HAZARD REPORTS FOR: SINAERO 1.2 METER FLYAWAY KU—BAND ANTENNA (MODEL SA—1.2TFY) SEA TEL 1.5 METER KU—BAND ANTENNA (Model 6006, 6009 and 6012) THRANE & THRANE 0.83 METER KU—BAND ANTENNA (MODEL TT—7080A SAILOR 800A) THRANE & THRANE 1.0 METER KU—BAND ANTENNA (MODEL TT—70908 SAILOR 900B)

§r‘/1/0([°\(*0 6/4" )49\TF7/ Exhibit Radiation Hazard Report Page 1 of 5 Analysis of Non—lonizing Radiation for a 1.2—Meter Earth Station System _ This report analyzes the non—ionizing radiation levels for a 1.2—meter earth station system. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97—01. The radiation safety limits used in the analysis are in conformance with the FCC R&O 96—326. Bulletin No. 65 and the FCC R&O specifies that there are two separate tiers of exposure limits that are dependant on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. The Maximum Permissible Exposure (MPE) limits for persons in a General Population/Uncontrolled environment are shown in Table 1. The General Population/Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. The MPE limits for persons in an Occupational/Controlled environment are shown in Table 2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The purpose of the analysis described in this report is to determine the power flux density levels of the earth station in the far—field, near—field, transition region, between the subreflector or feed and main reflector surface, at the main reflector surface, and between the antenna edge and the ground and to compare these levels to the specified MPEs. Table 1. Limits for General Population/Uncontrolled Exposure (MPE) Frequency Range (MHz) Power Density (mW/em") 30—300 0.2 300—1500 Frequency (MHz)*(0.8/1200) 1500—100,000 1.0 Table 2. Limits for Occupational/Controlled Exposure (MPE) Frequency Range (MHz) ___Power Density (mW/ecm") 30—300 1.0 300—1500 Frequency (MHz)*(4.0/1200) 1500—100,000 5.0 Table 3. Formulas and Parameters Used for Determining Power Flux Densities Parameter Symbol Formula Value Units Antenna Diameter D Input 1.2 m Antenna Surface Area Asurtace x D* / 4 1.13 m* Feed Flange Diameter Dia Input 7.1 cm Area of Feed Flange Aja x Di °/A 39.59 cm* Frequency F Input _ 14250 MHz Wavelength A 300 / F 0.021053 m Transmit Power P Input 47.20 W Antenna Gain (dBi) Cles Input 42.1 dBi Antenna Gain (factor) G 1 pces" 16218.1 n/a Pi T Constant 3.1415927 wa Antenna Efficiency m GA*/(r°D") 0.51 n/a

6’\/‘/aerod LA Exhibit Radiation Hazard Report Page 2 of 5 1. Far Field Distance Calculation The distance to the beginning of the far field can be determined from the following equation: Distance to the Far Field Region Ry; = 0.60 D/A (1) = 41.0 m The maximum main beam power density in the far field can be determined from the following equation: On—Axis Power Density in the Far Field S; = GP/(A t R;") (2) = 36.167 W/im* = 3.617 mW/cm* 2. Near Field Calculation Power flux density is considered to be at a maximum value throughout the entire length of the defined Near Field region. The region is contained within a cylindrical volume having the same diameter as the antenna. Past the boundary of the Near Field region, the power density from the antenna decreases linearly with respect to increasing distance. The distance to the end of the Near Field can be determined from the following equation: Extent of the Near Field Rn = D* / (4 A) (3) | = 17.1 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Sn =16.0n P /( D) (4) = 84.431 W/im" = 8443 mW/cm* 3. Transition Region Calculation The Transition region is located between the Near and Far Field regions. The power density begins to decrease linsarly with increasing distance in the Transition region. While the power density decreases inversely with distance in the Transition region, the power density decreases inversely with the square of the distance in the Far Field region. The maximum power density in the Transition region will not exceed that calculated for the Near Field region. The power density calculated in Section 1 is the highest power density the antenna can produce in any of the regions away from the antenna. The power density at a distance R, can be determined from the following equation: Transition Region Power Density S Sn Ra/ Ri (5) 8.443 mW/cm*

é,‘rl/c/@v‘& /. 2 Exhibit Radiation Hazard Report Page 3 of 5 4. Region between the Feed Assembly and the Antenna Reflector Transmissions from the feed assembly are directed toward the antenna reflector surface, and are confined within a conical shape defined by the type of feed assembly. The most common feed assemblies are waveguide flanges, horns or subreflectors. The energy between the feed assembly and reflector surface can be calculated by determining the power density at the feed assembly surface. This can be determined from the following equation: Power Density at the Feed Flange Sia = 4000 P / Ajj (6) = 4768.650 mW/cm* 5. Main Reflector Region The power density in the main reflector is determined in the same manner as the power density at the feed assembly. The area is now the area of the reflector aperture and can be determined from the following equation: Power Density at the Reflector Surface Ssurtace =4 P / Asurtace (7) = 166.936 W/im* = 16.694 mW/cm* 6. _ Region between the Reflector and the Ground Assuming uniform illumination of the reflector surface, the power density between the antenna and the ground can be determined from the following equation: Power Density between Reflector and Ground Syg =P / Asurtace (8) = 41.734 W/im* = 4173 mW/cm*

Pinrfa erq ) A Exhibit Radiation Hazard Report Page 4 of 5 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/iecm?) Hazard Assessment 1. Far Field (R; = 41.0 m) Sr 3.617 Potential Hazard 2. Near Field (R,; = 17.1 m) Snt 8.443 Potential Hazard 3. TransitionRegion (Ry; < R, < R;) St 8.443 Potential Hazard 4. Between Feed Assembly and Siaq 4768.650 Potential Hazard Antenna Reflector 5. Main Reflector Ssurtace 16.694 Potential Hazard 6. Between Reflector and Ground Sy 4.173 Potential Hazard Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/em") Hazard Assessment 1. Far Field (Ry = 41.0 m) S¢ 3.617 Satisfies FCC MPE 2. Near Field (R,; = 17.1 m) Sat 8.443 Potential Hazard 3. TransitionRegion (R; < R, < R;) S; 8.443 Potential Hazard 4. Between Feed Assembly and Sia 4768.650 Potential Hazard Antenna Reflector 5. Main Reflector Scurtace __16.694 Potential Hazard 6. Between Reflector and Ground Sy 4.173 Satisfies FCC MPE It is the applicant'é responsibility to ensure that the public and operational personnel are not exposed to harmful levels of radiation.

6; wgqero /’ D\ Exhibit Radiation Hazard Report Page 5 of 5 8. Conclusions Based upon the above analysis, it is concluded that harmful levels of radiation may exist in those regions noted for the Uncontrolled (Table 4) and Controlled (Table 5) environments. The earth station is a fly—away antenna for which the normally expected use is on a temporary basis. The antenna kit includes a tripod base allowing mounting on the ground, a vehicle or on a structure. It is recommended that if feasible the antenna be mounted such that the bottom of the tripod is at least 2 meters (6.5 feet) above the surface of the area on which it is located. If this is not feasible an area of at least 5 meters (16.5 feet) in front of the antenna and 1 meter (3 feet) to the sides and rear of the antenna should be roped off or additional procedures instituted to insure the safety of persons in the vicinity of the antenna. The applicant will ensure that the main beam of the antenna will be pointed at least one diameter away from any buildings, or other obstacles in those areas that exceed the MPE levels. Since one diameter removed from the center of the main beam the levels are down at least 20 dB, or by a factor of 100, public safety will be ensured. The earth station will marked with the standard radiation hazard warnings, as well as the area in the vicinity of the earth station, to inform those in the general population, who may be working, or otherwise present in the area, and in or near, the main beam of the antenna. Finally, occupational exposure will be limited, and the transmitter will be turned off during periods of maintenance, so that the MPE standard of 5.0 mw/cm**2 will be complied with for those regions in close proximity to the main reflector, and subreflector, which could be occupied by operating personnel. The applicant agrees to abide by the conditions specified in Condition 5208 provided below: Condition 5208 — The licensee shall take all necessary measures to ensure that the antenna does not create potential exposure ofhumans to radiofrequency radiation in excess of the FCC exposure limits defined in 47 CFR 1.1307(b) and 1.1310 wherever such exposures might occur. Measures must be taken to ensure compliance with limitsfor both occupational/controlled exposure andfor general population/uncontrolled exposure, as defined in these rule sections. Compliance can be accomplished in most cases by appropriate restrictions such as fencing. Requirements for restrictions can be determined by predictions based on calculations, modeling or by field measurements. The FCC‘s OET Bulletin 65 (available on—line at www.fec.gov/oet/rfsafety) provides information on predicting exposure levels and on methods for ensuring compliance, including the use of warning and alerting signs and protective equipmentfor worker.

SeqTel 1.3 WO@/WW/W/ L Exhibit Radiation Hazard Report Page 1 of 5 Analysis of Non—lonizing Radiation for a 1.5—Meter Earth Station System This report analyzes the non—ionizing radiation levels for a 1.5—meter earth station system. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97—01. The radiation safety limits used in the analysis are in conformance with the FCC R&O 96—326. Bulletin No. 65 and the FCC R&O specifies that there are two separate tiers of exposure limits that are dependant on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. The Maximum Permissible Exposure (MPE) limits for persons in a General Population/Uncontrolled environment are shown in Table 1. The General Population/Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. The MPE limits for persons in an Occupational/Controlled environment are shown in Table 2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The purpose of the analysis described in this report is to determine the power flux density levels of the earth station in the far—field, near—field, transition region, between the subreflector or feed and main reflector surface, at the main reflector surface, and between the antenna edge and the ground and to compare these levels to the specified MPEs. Table 1. Limits for General Population/Uncontrolled Exposure (MPE) Frequency Range (MHz) __Power Density (mWicm*) 30—300 0.2 300—1500 Frequency (MHz)*(0.9/1200) 1500—100,000 1.0 Table 2. Limits for Occupational/Controlled Exposure (MPE) Frequency Range (MHz) __Power Density (mW/icm) 30—300 1.0 300—1500 Frequency (MHz)*(4.0/1200) 1500—100,000 5.0 Table 3. Formulas and Parameters Used for Determining Power Flux Densities Parameter Symbol Formula Value Units Antenna Diameter D Input 1.5 m Antenna Surface Area Asurface x D* / 4 1.77 m Subreflector Diameter Dsr Input 5.6 cm Area of Subreflector Asr x Ds /4 24.63 cm* Frequency F Input 14250 MHz Wavelength A 300 / F 0.021053 m Transmit Power P Input 85.11 W Antenna Gain (dBi) Ges Input 45.1 dBi Antenna Gain (factor) G 4 pSest 32359.4 n/a Pi R Constant 3.1415927 n/a Antenna Efficiency n GNMI(RD®) 0.65 n/a

6()6/ TCD/ ” S Exhibit Radiation Hazard Report Page 2 of 5 1. Far Field Distance Calculation The distance to the beginning of the far field can be determined from the following equation: Distance to the Far Field Region Ry 0 .60 D/A (1) i1 64.1 m 11L The maximum main beam power density in the far field can be determined from the following equation: On—Axis Power Density in the Far Field S; = GP/(4 1 Rg") (2) = 53.299 W/im* = 5.330 mW/cm* 2. Near Field Calculation Power flux density is considered to be at a maximum value throughout the entire length of the defined Near Field region. The region is contained within a cylindrical volume having the same diameter as the antenna. Past the boundary of the Near Field region, the power density from the antenna decreases linearly with respect to increasing distance. The distance to the end of the Near Field can be determined from the following equation: Extent of the Near Field Ray = D* / (4 A) (3) = 26.7 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Sn 16.07P/(1 D) (4) 124.422 Wim* = 12.442 mWicm* 3. Transition Region Calculation The Transition region is located between the Near and Far Field regions. The power density begins to decrease linearly with increasing distance in the Transition region. While the power density decreases inversely with distance in the Transition region, the power density decreases inversely with the square of the distance in the Far Field region. The maximum power density in the Transition region will not exceed that calculated for the Near Field region. The power density calculated in Section 1 is the highest power density the antenna can produce in any of the regions away from the antenna. The power density at a distance R, can be determined from the following equation: Transition Region Power Density _ S = Si Ra/R (5) = 12.442 mWicm"

Seq To/ 1. 5 Radiation Hazard Report Page 3 of 5 4. Region between the Main Reflector and the Subreflector Transmissions from the feed assembly are directed toward the subreflector surface, and are reflected back toward the main reflector. The most common feed assemblies are waveguide flanges, horns or subreflectors. The energy between the subreflector and the reflector surfaces can be calculated by determining the power density at the subreflector surface. This can be determined from the following equation: Power Density at the Subreflector Sss 2 4000 P / Agr (6) = 13822.119 mW/icm* 5. Main Reflector Region The power density in the main reflector is determined in the same manner as the power density at the subreflector. The area is now the area of the main reflector aperture and can be determined from the following equation: Power Density at the Main Reflector Surface Ssurtace 7 4 P / Asurface (7) = 192.650 W/m* = 19.265 mWi/icm* 6. Region between the Main Reflector and the Ground Assuming uniform illumination of the reflector surface, the power density between the antenna and the ground can be determined from the following equation: Power Density between Reflector and Ground Sg = P / Asurface (8) = 48.162 W/im* = 4.816 mW/cm*

6‘00/ 7}/ ) & Exhibit Radiation Hazard Report Page 4 of 5 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/cm") Hazard Assessment 1. Far Field (R;= 64.1 m) Sy 5.330 Potential Hazard 2. Near Field (R,, = 26.7 m) Sat 12. 442 Potential Hazard 3. Transition Region (R,; < R, < Rg) S; 12.442 Potential Hazard 4. Between Main Reflector and Ss 13822.119 Potential Hazard Subreflector 5. Main Reflector Ssurtace 19.265 Potential Hazard 6. Between Main Reflector and Ground Sy 4.816 Potential Hazard Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level ({mW/cm"*) Hazard Assessment 1. Far Field (Rg;= 64.1 m) S¢ 5.330 Potential Hazard 2. Near Field (R,; = 26.7 m) Sn 12. 442 Potential Hazard 3. Transition Region (R,; < R, < Ry) S; 12.442 Potential Hazard 4. Between Main Reflector and Sy 13822119 Potential Hazard Subreflector 5. Main Reflector Ssurtace ___19.265 Potential Hazard 6. Between Main Reflector and Ground Sq 4.816 Satisfies FCC MPE It is the applicant‘s responsibility to ensure that the public and operational personnel are not exposed to harmful levels of radiation.

fi‘oq TCO/ /’5 Exhibit Radiation Hazard Report Page 5 of 5 8. Conclusions Based upon the above analysis, it is concluded that harmful levels of radiation may exist in those regions noted for the Uncontrolled (Table 4) and Controlled (Table 5) environments. The earth station will be mounted aboard a ship, and it is recommended that the lower edge of the antenna should be at least 2 meters above the deck. If this is not the case, additional procedures will be instituted to insure the safety of the Public in the vicinity of the antenna. The applicant will ensure that the main beam of the antenna will be pointed at least one diameter away from any buildings, or other obstacles in those areas that exceed the MPE levels. Since one diameter removed from the center of the main beam the levels are down at least 20 dB, or by a factor of 100, public safety will be ensured. The earth station will marked with the standard radiation hazard warnings, as well as the area in the vicinity of the earth station, to inform those in the general population, who may be working, or otherwise present on the ship, and in or near, the main beam of the antenna. Finally, occupational exposure will be limited, and the transmitter will be turned off during periods of maintenance, so that the MPE standard of 5.0 mw/icm**2 will be complied with for those regions in close proximity to the main reflector, and subreflector, which could be occupied by operating personnel. The applicant agrees to abide by the conditions specified in Condition 5208 provided below: Condition 5208 — The licensee shall take all necessary measures to ensure that the antenna does not create potential exposure ofhumans to radiofrequency radiation in excess ofthe FCC exposure limits defined in 47 CFR 1.1307(b) and 1.1310 wherever such exposures might occur. Measures must be taken to ensure compliance with limitsfor both occupational/controlled exposure andfor general population/uncontrolled exposure, as defined in these rule sections. Compliance can be accomplished in most cases by appropriate restrictions such asfencing. Requirementsfor restrictions can be determined by predictions based on calculations, modeling or byfield measurements. The FCC‘s OET Bulletin 65 (available on—line at www.fec.gov/oet/rfsafety) provides information on predicting exposure levels and on methods for ensuring compliance, including the use of warning and alerting signs and protective equipmentfor worker.

Throwe 4 Thpamve 282 5/00/1 hoi Radiation Hazard Report Page 1 of 5 Analysis of Non—lonizing Radiation for a 0.83—Meter Earth Station System This report analyzes the non—ionizing radiation levels for a 0.8—meter earth station system. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97—01. The radiation safety limits used in the analysis are in conformance with the FCC R&O 96—326. Bulletin No. 65 and the FCC R&O specifies that there are two separate tiers of exposure limits that are dependant on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. The Maximum Permissible Exposure (MPE) limits for persons in a General Population/Uncontrolled environment are shown in Table 1. The General Population/Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. The MPE limits for persons in an Occupational/Controlled environment are shown in Table 2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The purpose of the analysis described in this report is to determine the power flux density levels of the earth station in the far—field, near—field, transition region, between the subreflector or feed and main reflector surface, at the main reflector surface, and between the antenna edge and the ground and to compare these levels to the specified MPEs. Table 1. Limits for General Population/Uncontrolled Exposure (MPE) Frequency Range (MHz) Power Density (mW/em") 30—300 : 0.2 300—1500 Frequency (MHz)*(0.8/1200) 1500—100,000 1.0 Table 2. Limits for Occupational/Controlled Exposure (MPE) Frequency Range (MHz) Power Density (mW/em") 30—300 1.0 300—1500 Frequency (MHz)*(4.0/1200) 1500—100,000 5.0 Table 3. Formulas and Parameters Used for Determining Power Flux Densities Parameter Symbol Formula Value Units Antenna Diameter D Input 0.83 m Antenna Surface Area Asurtace x D/ 4 0.54 m* Subreflector Diameter Ds Input 5.0 cm Area of Subreflector Asr x Ds, "/A 19.63 cm* Frequency F Input 14250 MHz Wavelength A 300 /F 0.021053 m Transmit Power P Input 5.495 W Antenna Gain (dBi) Ges Input 40.0 dBi Antenna Gain (factor) G 1 pCes 10000.0 n/a Pi I Constant 3.1415927 n/a Antenna Efficiency n GA/(RD") 0.65 n/a

Thwfljfi Q. %3 Exhibit Radiation Hazard Report Page 2 of 5 1. Far Field Distance Calculation The distance to the beginning of the far field can be determined from the following equation: Distance to the Far Field Region Ry =0.60 D/A (1) = 19.6 m The maximum main beam power density in the far field can be determined from the following equation: On—Axis Power Density in the Far Field S; =GP/(4 1 Ry") (2) = 11.344 W/im* = 1.134 mW/icm* 2. Near Field Calculation Power flux density is considered to be at a maximum value throughout the entire length of the defined Near Field region. The region is contained within a cylindrical volume having the same diameter as the antenna. Past the boundary of the Near Field region, the power density from the antenna decreases linearly with respect to increasing distance. The distance to the end of the Near Field can be determined from the following equation: Extent of the Near Field Rny = D/ (4 4) (3) = 8.2 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Sir = 16.0 n P / (1 D°) (4) = 26.481 W/m* = 2648 mW/cm* 3. Transition Region Calculation The Transition region is located between the Near and Far Field regions. The power density begins to decrease linearly with increasing distance in the Transition region. While the power density decreases inversely with distance in the Transition region, the power density decreases inversely with the square of the distance in the Far Field region. The maximum power density in the Transition region will not exceed that calculated for the Near Field region. The power density calculated in Section 1 is the highest power density the antenna can produce in any of the regions away from the antenna. The power density at a distance R, can be determined from the following equation: Transition Region Power Density S = Sn Ra/ Rf (5) = 2.648 mW/cm*

Th rawe 0.83 im Radiation Hazard Report Page 3 of 5 4. Region between the Main Reflector and the Subreflector Transmissions from the feed assembly are directed toward the subreflector surface, and are reflected back toward the main reflector. The most common feed assemblies are waveguide flanges, horns or subreflectors. The energy between the subreflector and the reflector surfaces can be calculated by determining the power density at the subreflector surface. This can be determined from the following equation: Power Density at the Subreflector Se, = 4000 P / Ag (6) = 1119.432 mW/cm* 5. Main Reflector Region The power density in the main reflector is determined in the same manner as the power density at the subreflector. The area is now the area of the main reflector aperture and can be determined from the following equation: Power Density at the Main Reflector Surface Ssurtace =4 P / Asurtace (7) = 40.624 W/im* = 4.062 mW/cm* 6. Region between the Main Reflector and the Ground Assuming uniform illumination of the reflector surface, the power density between the antenna and the ground can be determined from the following equation: Power Density between Reflector and Ground Sy F>/Asun‘ace (8) 10.156 W/m" 1.016 mW/cm*

T//) roe 2. 8 3 Exhibit Radiation Hazard Report Page 4 of 5 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/em) Hazard Assessment 1. Far Field (R; = 19.6 m) S¢ 1.134 Potential Hazard 2. Near Field (R,; = 8.2 m) Snt 2.648 Potential Hazard 3. Transition Region (Ry; < R, < Rg) S; 2.648 Potential Hazard 4. Between Main Reflector and Sser 1119.432 Potential Hazard Subreflector 5. Main Reflector Ssurtace 4.062 Potential Hazard 6. Between Main Reflector and Ground Sq 1.016 Potential Hazard Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/cm") Hazard Assessment 1. Far Field (R;= 19.6 m) feff 1.134 Satisfies FCC MPE 2. Near Field (R,, = 8.2 m) Snt 2.648 Satisfies FCC MPE 3. Transition Region (Ry; < R, < R;) S; 2.648 Satisfies FCC MPE 4. Between Main Reflector and Ser 1119.432 Potential Hazard Subreflector 5. Main Reflector Ssurtace 4.062 Satisfies FCC MPE 6. Between Main Reflector and Ground Sy 1.016 Satisfies FCC MPE It is the applicant‘s responsibility to ensure that the public and operational personnel are not exposed to harmful levels of radiation.

777 rowle 2. 63 Exhibit Radiation Hazard Report Page 5 of 5 8. Conclusions Based upon the above analysis, it is concluded that harmful levels of radiation may exist in those regions noted for the Uncontrolled (Table 4) environment. The earth station will be mounted aboard a ship, and it is recommended that the lower edge of the antenna should be at least 2 meters above the deck. If this is not the case, additional procedures will be instituted to insure the safety of the Public in the vicinity of the antenna. The applicant will ensure that the main beam of the antenna will be pointed at least one diameter away from any buildings, or other obstacles in those areas that exceed the MPE levels. Since one diameter removed from the center of the main beam the levels are down at least 20 dB, or by a factor of 100, public safety will be ensured. The earth station will marked with the standard radiation hazard warnings, as well as the area in the vicinity of the earth station, to inform those in the general population, who may be working, or otherwise present on the ship, and in or near, the main beam of the antenna. Finally, occupational exposure will be limited, and the transmitter will be turned off during periods of maintenance, so that the MPE standard of 5.0 mw/icm**2 will be complied with for those regions in close proximity to the main reflector, and subreflector, which could be occupied by operating personnel. The applicant agrees to abide by the conditions specified in Condition 5208 provided below: Condition 5208 — The licensee shall take all necessary measures to ensure that the antenna does not create potential exposure ofhumans to radiofrequency radiation in excess ofthe FCC exposure limits defined in 47 CFR 1.1307(b) and 1.1310 wherever such exposures might occur. Measures must be taken to ensure compliance with limits for both occupational/controlled exposure andfor general population/uncontrolled exposure, as defined in these rule sections. Compliance can be accomplished in most cases by appropriate restrictions such as fencing. Requirements for restrictions can be determined by predictions based on calculations, modeling or by field measurements. The FCC‘s OET Bulletin 65 (available on—line at www.fec.gov/oet/rfsafety) provides information on predicting exposure levels and on methods for ensuring compliance, including the use of warning and alerting signs and protective equipmentfor worker.

ThYWULO of T/’V‘fl/fl/P Lo Q&OEX?bitB Radiation Hazard Report Page 1 of 5 Analysis of Non—lonizing Radiation for a 1.03—Meter Earth Station System This report analyzes the non—ionizing radiation levels for a 1.0—meter earth station system. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97—01. The radiation safety limits used in the analysis are in conformance with the FCC R&O 96—326. Bulletin No. 65 and the FCC R&O specifies that there are two separate tiers of exposure limits that are dependant on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. The Maximum Permissible Exposure (MPE) limits for persons in a General Population/Uncontrolled environment are shown in Table 1. The General Population/Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. The MPE limits for persons in an Occupational/Controlled environment are shown in Table 2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The purpose of the analysis described in this report is to determine the power flux density levels of the earth station in the far—field, near—field, transition region, between the subreflector or feed and main reflector surface, at the main reflector surface, and between the antenna edge and the ground and to compare these levels to the specified MPEs. Table 1. Limits for General Population/Uncontrolled Exposure (MPE) Frequency Range (MHz) Power Density (mW/icm") 30—300 0.2 300—1500 Frequency (MHz)*(0.8/1200) 1500—100,000 1.0 Table 2. Limits for Occupational/Controlled Exposure (MPE) Frequency Range (MHz) Power Density (mW/cm") 30—300 1.0 300—1500 Frequency (MHz)*(4.0/1200) 1500—100,000 5.0 Table 3. Formulas and Parameters Used for Determining Power Flux Densities Parameter Symbo! Formula Value Units Antenna Diameter D Input 1.03 m Antenna Surface Area Asurtace 1x D/ 4 0.83 m* Subreflector Diameter Ds Input 5.3 cm Area of Subreflector Asr 1 Ds,"/4 22.06 cm* Frequency F Input 14250 MHz Wavelength A 300 / F 0.021053 m Transmit Power P Input 7.44 W Antenna Gain (dBi) CGes Input 41.1 dBi Antenna Gain (factor) G 10%°"° 12882.5 n/a Pi T Constant 3.1415927 n/a Antenna Efficiency n GA/(r°D") 0.55 n/a

/h onE .O Exhibit B Radiation Hazard Report Page 2 of 5 1. Far Field Distance Calculation The distance to the beginning of the far field can be determined from the following equation: Distance to the Far Field Region R; = 0.60 D/A (1) = 30.2 m The maximum main beam power density in the far field can be determined from the following equation: On—Axis Power Density in the Far Field S; =GP/(4 1 Ry*) (2) = 8.343 W/im* = 0.834 mW/cm* 2. Near Field Calculation Power flux density is considered to be at a maximum value throughout the entire length of the defined Near Field region. The region is contained within a cylindrical volume having the same diameter as the antenna. Past the boundary of the Near Field region, the power density from the antenna decreases linearly with respect to increasing distance. The distance to the end of the Near Field can be determined from the following equation: Extent of the Near Field Ry = D/ (4 A) (3) = 12.6 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Sy = 16.0 71 P / (t D) (4) = 19.476 W/im* = 1.948 mW/cm* 3. Transition Region Calculation The Transition region is located between the Near and Far Field regions. The power density begins to decrease linearly with increasing distance in the Transition region. While the power density decreases inversely with distance in the Transition region, the power density decreases inversely with the square of the distance in the Far Field region. The maximum power density in the Transition region will not exceed that calculated for the Near Field region. The power density calcultated in Section 1 is the highest power density the antenna can produce in any of the regions away from the antenna. The power density at a distance R, can be determined from the following equation: Transition Region Power Density S = Sy Ra/ Rt (5) = 1.948 mW/cm*

Thyou)? /.0 Exhibit B Radiation Hazard Report Page 3 of 5 4. Region between the Main Reflector and the Subreflector Transmissions from the feed assembly are directed toward the subreflector surface, and are reflected back toward the main reflector. The most common feed assemblies are waveguide flanges, horns or subreflectors. The energy between the subreflector and the reflector surfaces can be calculated by determining the power density at the subreflector surface. This can be determined from the following equation: Power Density at the Subreflector Ss, = 4000 P / Ag, (6) = 1348.936 mW/cm* 5. Main Reflector Region The power density in the main reflector is determined in the same manner as the power density at the subreflector. The area is now the area of the main reflector aperture and can be determined from the following equation: Power Density at the Main Reflector Surface Ssurtace = 4 P / Asurtace (7) = 35.716 W/im* = 3.572 mW/icm* 6. Region between the Main Reflector and the Ground Assuming uniform illumination of the reflector surface, the power density between the antenna and the ground can be determined from the following equation: Power Density between Reflector and Ground Sg =P / Asurtace (8) = 8.929 W/im = 0.893 mW/cm*

777 vraw2 /U Exhibit B Radiation Hazard Report Page 4 of 5 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/iem*} Hazard Assessment 1. Far Field (R; = 30.2 m) S¢ 0.834 Satisfies FCC MPE 2. Near Field (R,; = 12.6 m) Sat 1.948 Potential Hazard 3. Transition Region (Ry, < R, < Ry) St 1.948 Potential Hazard 4. Between Main Reflector and Ser 1348.936 Potential Hazard Subreflector 5. Main Reflector Ssurtace 3.572 Potential Hazard 6. Between Main Reflector and Ground S 0.893 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/em*) Hazard Assessment _ 1. Far Field (R; = 30.2 m) S¢ 0.834 Satisfies FCC MPE 2. Near Field (R,, = 12.6 m) Snt 1.948 Satisfies FCC MPE 3. Transition Region (Ry; < R; < R;) S; 1.948 Satisfies FCC MPE 4. Between Main Reflector and Ser 1348.936 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.572 Satisfies FCC MPE 6. Between Main Reflector and Ground Sy 0.893 Satisfies FCC MPE It is the applicant‘s responsibility to ensure that the public and operational personnel are not exposed to harmful levels of radiation.

‘fi’)W/\/LO //@ Exhibit B Radiation Hazard Report Page 5 of 5 8. Conclusions Based upon the above analysis, it is concluded that harmful levels of radiation may exist in those regions noted for the Uncontrolled (Table 4) environment. The earth station will be mounted aboard a ship, and it is recommended that the lower edge of the antenna should be at least 2 meters above the deck. If this is not the case, additional procedures will be instituted to insure the safety of the Public in the vicinity of the antenna. The applicant will ensure that the main beam of the antenna will be pointed at least one diameter away from any buildings, or other obstacles in those areas that exceed the MPE levels. Since one diameter removed from the center of the main beam the levels are down at least 20 dB, or by a factor of 100, public safety will be ensured. The earth station will marked with the standard radiation hazard warnings, as well as the area in the vicinity of the earth station, to inform those in the general population, who may be working, or otherwise present on the ship, and in or near, the main beam of the antenna. Finally, occupational exposure will be limited, and the transmitter will be turned off during periods of maintenance, so that the MPE standard of 5.0 mw/cm**2 will be complied with for those regions in close proximity to the main reflector, and subreflector, which could be occupied by operating personnel. The applicant agrees to abide by the conditions specified in Condition 5208 provided below: Condition 5208 — The licensee shall take all necessary measures to ensure that the antenna does not create potential exposure ofhumans to radiofrequency radiation in excess ofthe FCC exposure limits defined in 47 CFR 1.1307(b) and 1.1310 wherever such exposures might occur. Measures must be taken to ensure compliance with limits for both occupational/controlled exposure andfor general population/uncontrolled exposure, as defined in these rule sections. Compliance can be accomplished in most cases by appropriate restrictions such as fencing. Requirements for restrictions can be determined by predictions based on calculations, modeling or by field measurements. The FCC‘s OET Bulletin 65 (available on—line at www.fec.gov/oet/rfsafety) provides information on predicting exposure levels and on methods for ensuring compliance, including the use of warning and alerting signs and protective equipmentfor worker.


Document Created: 2013-11-04 17:50:40
Document Modified: 2013-11-04 17:50:40
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC