Attachment RadHaz

This document pretains to SES-RWL-20100830-01108 for Renewal on a Satellite Earth Station filing.

IBFS_SESRWL2010083001108_837156

Radiation Hazard Report Page 1 of 5 Analysis of Non—lonizing Radiation for a 9.3-Méter Earth Station System This report analyzes the non—ionizing radiation levels for a 9.3—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 timits 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/Uncontrolied 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/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 9.3 m Antenna Surface Area Asurface 1 D/ 4 67.93 m* Subreflector Diameter Ds Input 110.0 ocm Area of Subreflector Asr x Ds /4 9503.32 om" Frequency F Input 14250 MHz Wavelength A 300 /F 0.021053 m Transmit Power P Input 750.00 W Antenna Gain (dBi) Gee Input 61.0 dBi Antenna Gain (factor) G 19Ce="> 1258925.4 n/a Pi x Constant 3.1415927 n/a Antenna Efficiency n GM(RD) 0.65 n/a

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) = 2465.0 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/(4 1 Ry") (2) = 12.366 W/m* = 1.237 mWicm* 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 2) (3) = 1027.1 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Sir = 16.0 1 P / (x D) (4) = 28.868 W/m* = 2.887 mW/icm* 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 = Sy Rar/ Re (5) = 2.887 mW/cm*

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) = 315.679 mW/cm" 5. Main Reflector Region The power density in the main reflectoris 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) = 44.164 Wim" = 4.416 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 Sy =P / Asuface (8) = 11.041 W/im* = 1.104 mW/icm*

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/icm?) Hazard Assessment 1. Far Field (Ry = 2465.0 m) S¢ 1.237 Potential Hazard 2. Near Field (Ry= 1027.1 m) Sn 2.887 Potential Hazard 3. Transition Region (Ry<R,< R;) S, 2.887 Potential Hazard 4. Between Main Reflector and Ss 315.679 Potential Hazard Subreflector 5. Main Reflector Ssurtace 4.416 Potential Hazard 6. Between Main Reflector and Ground Sq 1.104 Potential Hazard Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/icm*} Hazard Assessment 1. Far Field (R§ = 2465.0 m) Sy 1.237 Satisfies FCC MPE 2. Near Field (Ry=1027.1 m) Sn 2.887 Satisfies FCC MPE 3. Transition Region (Ry < R, < Ry) S, 2.887 Satisfies FCC MPE 4. Between Main Reflector and Ssr 315.679 Potential Hazard Subreflector 5. Main Reflector Ssurface 4.416 Satisfies FCC MPE 6. Between Main Reflector and Ground S; 1.104 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. 8. Conclusions Based on the above analysis it is concluded that the FCC MPE guidelines have been exceeded (or met) in the regions of Table 4 and 5. The applicant proposes to comply with the MPE limits by one or more of the following methods. Means of Compliance Uncontrolled Areas This antenna will be located in a fenced area. The fenced area will be sufficient to prohibit access to the areas that exceed the MPE limits. The general public will not have access to areas within % diameter removed from the edge of the antenna. Since one diameter removed from the main beam of the antenna or % diameter removed from the edge of the antenna reduces RF levels by a factor of 100 or 20 dB, none of the areas exceeding the MPE limits will be accessible by the general public. Radiation hazard signs will be posted while this earth station is in operation.

Radiation Hazard Report Page 5 of 5 The applicant will ensure that no buildings or other obstacles will be in the areas that exceed the MPE limits. Means of Compliance Controlled Areas The earth station‘s operational personnel will not have access to the areas that exceed the MPE limits while the earth station is in operation. The transmitters will be turned off during antenna maintenance.

Radiation Hazard Report Analysis of Non—lonizing Radiation for a 4.5—Meter Earth Station System This report analyzes the non—ionizing radiation levels for a 4.5—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/Uncontrolied 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 determing 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/Controlied Exposure (MPE) Frequency Range (MHz) Power Density (mW/icm") 30—300 1.0 300—1500 FErequency (MHz)*(4.0/1200) 1500—100,000 5.0 Table 3. Formulas and Parameters Used for Determining Power Flux Densities Parameter Symbot Formula Value Units Antenna Diameter D Input 4.5 m Antenna Surface Area Asurtace 1 D"/ 4 15.90 m Subreflector Diameter Dyr Input 61.0 m Area of Subreflector Asr x Ds /4 2922.47 cm* Frequency F Input 14250 MHz Wavelength A 300/F 0.021053 m Transmit Power P input 250.00 W Antenna Gain (dBi) Ges Input 54.9 dBi Antenna Gain (factor) G 109C 309029.5 n/a Pi x Constant 3.1415927 n/a Antenna Efficiency n Gr2(@D") 0.69 n/a

Radiation Hazard Report 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) =577.1 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 Sr GP/(4 1 Ry) (2) 11 18.458 W/im* modl 1.846 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) = 240.5 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Sar = 16.0 1 P / (x D) (4) = 43.090 W/im" = 4.309 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 =SrRa/R (5)© =4.309 mW/icm?*

Radiation Hazard Report 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, homs 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) =342.177 mWicm* 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) = 82.876 Wim" = 6.288 mW/icm* 6. Region between the Main Reflector and the Ground Assuming uniform ilumination 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 S P 1 Asurtace (8) ll ll t 15.719 Wim* 1.572 mWicm*

Radiation Hazard Report 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mWIcmz) Hazard Assessment 1. Far Field (Rg = 577.1 m) S¢ 1.846 Potential Hazard 2. Near Field (R;y= 240.5 m) S 4.309 Potential Hazard 3. Transition Region (Ry <R,< Ry) S; 4.309 Potential Hazard 4. Between Main Refiector and Ssr 342.177 Potential Hazard Subreflector 5. Main Reflector Ssurtace 6.288 Potential Hazard 6. Between Main Reflector and Ground Sq 1.572 Potential Hazard Table 5. Summary of Expected Radiation levels for Controlied Environment Calculated Maximum Radiation Power Density Region Level (mWicm*) Hazard Assessment 1. Far Field (Ry = 577.1 m) Sz 1.846 Satisfies FCC MPE 2. Near Field (Ry, = 240.5 m) Sre 4.309 Satisfies FCC MPE 3. Transition Region (Ry < R; < R&) S; 4.309 Satisfies FCC MPE 4. Between Main Reflector and Sy 342.177 Potential Hazard Subreflector 5. Main Reflector Seurface 6.288 Potential Hazard 6. Between Main Reflector and Ground Sy 1.572 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. 8. Conclusions Based on the above analysis it is concluded that the FCC MPE quidelines have been exceeded (or met) in the regions of Table 4 and 5. The applicant proposes to comply with the MPE limits by one or more of the following methods. Means of Compliance Uncontrolled Areas This antenna will be tocated in a fenced area. The fenced area will be sufficient to prohibit access to the areas that exceed the MPE limits. The general public will not have access to areas within 14 diameter removed from the edge of the antenna. Since one diameter removed from the main beam of the antenna or %% diameter removed from the —edge of the antenna reduces RF levels by a factor of 100 or 20 dB, none of the areas exceeding the MPE limits will be accessible by the general public.

Radiation Hazard Report Radiation hazard signs will be posted while this earth station is in operation. The applicant will ensure that no buildings or other obstacles will be in the areas that exceed the MPE limits. i Means of Compliance Controlled Areas The earth station‘s operational personnel will not have access to the areas that exceed the MPE | limits while the earth station is in operation. The transmitters will be turned off during antenna maintenance. |

Radiation Hazard Report Analysis of Non—lonizing Radiation for a 5.5—Meter Earth Station System This report analyzes the nom—ionizing radiation levels for a 5.5—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 peried of six minutes or less. The purpose of the analysis described in this report is to determing the power flux density levels of the earth station in the far—field, near—fleld, 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 Symbol Formula Value Units Antenna Diameter D Input 5.5 m Antenna Surface Area Asurtace 1D*/ 4 23.76 m Subreflector Diameter Dsr Input 88.9 cm Area of Subreflector Asr x D."/4 6207.17 cm" Frequency F Input 14250 MHz Wavelength A 300/F . 0.021053 m Transmit Power P Input 250.00 W Antenna Gain (dBi) Gee Input 56.3 dBi Antenna Gain (factor) G 10c°"° 426579.5 n/a Pi x Constant 3.1415927 n/a Antenna Efficiency n GNIGD) 0.63 n/a

Radiation Hazard Report 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; =0.60D°/A (1) = 862.1 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 S4; =GP/(4x Rfiz) (2) = 11.418 W/im* =1.142 mWi/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 Ra =D*/ (4 2) (3) =359.2 m The maximum power density in the Near Field can be determined from the following equation: . Near Field Power Density Sir = 16.0 1 P / (x D) ©(4) = 26.655 W/m* =2,665 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 = Sy Ru/R (5) =2.665 mW/icm"

Radiation Hazard Report 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 / As (8) = 161.104 mW/icm* 5. Main Reflector Region The power density in the main reflectoris 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 Seurtace =4 P / Asurtice (7) > =42.091 W/im" =4.209 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 Sg =P / Asurtace (8) = 10.523 W/im" =1.052 mWicm*

Radiation Hazard Report 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mWiem‘) Hazard Assessment 1. Far Field (Ry = 862.1 m) S¢ 1.142 Potential Hazard 2. Near Field (Ry = 359.2 m) Sar 2.665 Potential Hazard 3. Transition Region (Ry < R; < Rg) S, 2.665 Potential Hazard 4. Between Main Reflector and Ssr 161.104 Potential Hazard Subreflector 5. Main Reflector Ssurface 4.209 Potential Hazard 6. Between Main Reflector and Ground S 1.052 Potential Hazard Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/icm*) Hazard Assessment 1. Far Field (Ry = 862.1 m) S¢ 1.142 Satisfies FCC MPE 2. Near Field (R,; = 359.2 m) Sn 2.665 Satisfies FCC MPE 3. Transition Region (Ry; < R, < R;) S 2.665 Satisfies FCC MPE 4. Between Main Reflector and Ssr 161.104 Potential Hazard Subreflector 5. Main Reflector Ssurface 4.209 Satisfies FCC MPE 6. Between Main Reflector and Ground S, 1.052 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. 8. Conclusions Based on the above analysis it is concluded that the FCC MPE guidelines have been exceeded (or met) in the regions of Table 4 and 5. The applicant proposes to comply with the MPE limits by one or more of the following methods. Means of Compliance Uncontrolled Areas This antenna will be located in a fenced area. The fenced area will be sufficient to prohibit access to the areas that exceed the MPE limits. The general public will not have access to areas within %% diameter removed from the edge of the antenna. Since one diameter removed from the main beam of the antenna or %% diameter removed from the edge of the antenna reduces RF levels by a factor of 100 or 20 dB, none of the areas exceeding the MPE limits will be accessible by the general public.

Radiation Hazard Report Radiatibn hazard signs will be posted while this earth station is in operation. The applicant will ensure that no buildings or other obstacles will be in the areas that exceed the MPE limits. Means of Compliance Controlied Areas The earth station‘s operational personnel will not have access to the areas that exceed the MPE limits while the earth station is in operation. The transmitters will be turned off during antenna maintenance.


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Document Modified: 2019-04-28 03:00:50
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