Attachment RadHaz

This document pretains to SES-MOD-20110630-00778 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2011063000778_898450

Exhibit Radiation Hazard Report Page 1 of 26 Analysis of Non-Ionizing Radiation for a 1.0-Meter Earth Station System – SeaTel 4003 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/cm2) 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/cm2) 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 1.0 m Antenna Surface Area Asurface π D2 / 4 0.79 m2 Subreflector Diameter Dsr Input 19.0 cm Area of Subreflector Asr π Dsr 2/4 283.53 cm2 Frequency F Input 14250 MHz Wavelength λ 300 / F 0.021053 m Transmit Power P Input 6.00 W Antenna Gain (dBi) Ges Input 40.0 dBi Antenna Gain (factor) G 10Ges/10 10000.0 n/a Pi π Constant 3.1415927 n/a Antenna Efficiency η Gλ2/(π2D2) 0.45 n/a

Exhibit Radiation Hazard Report Page 2 of 26 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 Rff = 0.60 D2 / λ (1) = 28.5 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 Sff = G P / (4 π Rff 2) (2) = 5.878 W/m2 = 0.588 mW/cm2 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 Rnf = D2 / (4 λ) (3) = 11.9 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Snf = 16.0 η P / (π D2) (4) = 13.723 W/m2 = 1.372 mW/cm2 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 Rt can be determined from the following equation: Transition Region Power Density St = Snf Rnf / Rt (5) = 1.372 mW/cm2

Exhibit Radiation Hazard Report Page 3 of 26 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 Ssr = 4000 P / Asr (6) = 84.648 mW/cm2 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 Ssurface = 4 P / Asurface (7) = 30.558 W/m2 = 3.056 mW/cm2 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) = 7.639 W/m2 = 0.764 mW/cm2

Exhibit Radiation Hazard Report Page 4 of 26 7. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.588 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 1.372 Potential Hazard 3. Transition Region (Rnf < Rt < Rff) St 1.372 Potential Hazard 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Potential Hazard 6. Between Main Reflector and Ground Sg 0.764 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.588 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 1.372 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 1.372 Satisfies FCC MPE 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Satisfies FCC MPE 6. Between Main Reflector and Ground Sg 0.764 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. Radiation hazard signs will be posted while this earth station is in operation and the antennas will be mounted above ground for security reasons, which in turn, will prevent public access in and around the earth station. Means of Compliance Controlled Areas The earth station’s operational staff will not have access to the areas that exceed the MPE levels while the earth station is in operation.

Exhibit Radiation Hazard Report Page 5 of 26 The transmitters will be turned off during antenna maintenance 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 of humans 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 limits for both occupational/controlled exposure and for 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.fcc.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 equipment for worker.

Exhibit Radiation Hazard Report Page 6 of 26 Analysis of Non-Ionizing Radiation for a 1.0-Meter Earth Station System – SeaTel 4006 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/cm2) 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/cm2) 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 1.0 m Antenna Surface Area Asurface π D2 / 4 0.79 m2 Subreflector Diameter Dsr Input 19.0 cm Area of Subreflector Asr π Dsr 2/4 283.53 cm2 Frequency F Input 14250 MHz Wavelength λ 300 / F 0.021053 m Transmit Power P Input 6.00 W Antenna Gain (dBi) Ges Input 41.8 dBi Antenna Gain (factor) G 10Ges/10 15135.6 n/a Pi π Constant 3.1415927 n/a Antenna Efficiency η Gλ2/(π2D2) 0.68 n/a

Exhibit Radiation Hazard Report Page 7 of 26 9. 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 Rff = 0.60 D2 / λ (1) = 28.5 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 Sff = G P / (4 π Rff 2) (2) = 8.897 W/m2 = 0.890 mW/cm2 10. 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 Rnf = D2 / (4 λ) (3) = 11.9 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Snf = 16.0 η P / (π D2) (4) = 20.770 W/m2 = 2.077 mW/cm2 11. 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 Rt can be determined from the following equation: Transition Region Power Density St = Snf Rnf / Rt (5) = 2.077 mW/cm2

Exhibit Radiation Hazard Report Page 8 of 26 12. 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 Ssr = 4000 P / Asr (6) = 84.648 mW/cm2 13. 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 Ssurface = 4 P / Asurface (7) = 30.558 W/m2 = 3.056 mW/cm2 14. 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) = 7.639 W/m2 = 0.764 mW/cm2

Exhibit Radiation Hazard Report Page 9 of 26 15. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.890 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 2.077 Potential Hazard 3. Transition Region (Rnf < Rt < Rff) St 2.077 Potential Hazard 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Potential Hazard 6. Between Main Reflector and Ground Sg 0.764 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.890 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 2.077 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 2.077 Satisfies FCC MPE 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Satisfies FCC MPE 6. Between Main Reflector and Ground Sg 0.764 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. 16. 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. Radiation hazard signs will be posted while this earth station is in operation and the antennas will be mounted above ground for security reasons, which in turn, will prevent public access in and around the earth station. Means of Compliance Controlled Areas The earth station’s operational staff will not have access to the areas that exceed the MPE levels while the earth station is in operation.

Exhibit Radiation Hazard Report Page 10 of 26 The transmitters will be turned off during antenna maintenance 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 of humans 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 limits for both occupational/controlled exposure and for 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.fcc.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 equipment for worker

Exhibit Radiation Hazard Report Page 11 of 26 Analysis of Non-Ionizing Radiation for a 1.0-Meter Earth Station System – SeaTel 4009 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/cm2) 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/cm2) 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 1.0 m Antenna Surface Area Asurface π D2 / 4 0.79 m2 Subreflector Diameter Dsr Input 19.0 cm Area of Subreflector Asr π Dsr 2/4 283.53 cm2 Frequency F Input 14250 MHz Wavelength λ 300 / F 0.021053 m Transmit Power P Input 6.00 W Antenna Gain (dBi) Ges Input 40.6 dBi Antenna Gain (factor) G 10Ges/10 11481.5 n/a Pi π Constant 3.1415927 n/a Antenna Efficiency η Gλ2/(π2D2) 0.52 n/a

Exhibit Radiation Hazard Report Page 12 of 26 17. 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 Rff = 0.60 D2 / λ (1) = 28.5 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 Sff = G P / (4 π Rff 2) (2) = 6.749 W/m2 = 0.675 mW/cm2 18. 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 Rnf = D2 / (4 λ) (3) = 11.9 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Snf = 16.0 η P / (π D2) (4) = 15.756 W/m2 = 1.576 mW/cm2 19. 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 Rt can be determined from the following equation: Transition Region Power Density St = Snf Rnf / Rt (5) = 1.576 mW/cm2

Exhibit Radiation Hazard Report Page 13 of 26 20. 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 Ssr = 4000 P / Asr (6) = 84.648 mW/cm2 21. 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 Ssurface = 4 P / Asurface (7) = 30.558 W/m2 = 3.056 mW/cm2 22. 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) = 7.639 W/m2 = 0.764 mW/cm2

Exhibit Radiation Hazard Report Page 14 of 26 23. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.675 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 1.576 Potential Hazard 3. Transition Region (Rnf < Rt < Rff) St 1.576 Potential Hazard 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Potential Hazard 6. Between Main Reflector and Ground Sg 0.764 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.675 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 1.576 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 1.576 Satisfies FCC MPE 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Satisfies FCC MPE 6. Between Main Reflector and Ground Sg 0.764 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. 24. 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. Radiation hazard signs will be posted while this earth station is in operation and the antennas will be mounted above ground for security reasons, which in turn, will prevent public access in and around the earth station. Means of Compliance Controlled Areas The earth station’s operational staff will not have access to the areas that exceed the MPE levels while the earth station is in operation.

Exhibit Radiation Hazard Report Page 15 of 26 The transmitters will be turned off during antenna maintenance 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 of humans 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 limits for both occupational/controlled exposure and for 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.fcc.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 equipment for worker.

Exhibit Radiation Hazard Report Page 16 of 26 Analysis of Non-Ionizing Radiation for a 1.2-Meter Earth Station System – AZU-12 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/cm2) 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/cm2) 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 Asurface π D2 / 4 1.13 m2 Subreflector Diameter Dsr Input 19.0 cm Area of Subreflector Asr π Dsr 2/4 283.53 cm2 Frequency F Input 14250 MHz Wavelength λ 300 / F 0.021053 m Transmit Power P Input 6.00 W Antenna Gain (dBi) Ges Input 43.2 dBi Antenna Gain (factor) G 10Ges/10 20893.0 n/a Pi π Constant 3.1415927 n/a Antenna Efficiency η Gλ2/(π2D2) 0.65 n/a

Exhibit Radiation Hazard Report Page 17 of 26 25. 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 Rff = 0.60 D2 / λ (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 Sff = G P / (4 π Rff 2) (2) = 5.923 W/m2 = 0.592 mW/cm2 26. 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 Rnf = D2 / (4 λ) (3) = 17.1 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Snf = 16.0 η P / (π D2) (4) = 13.826 W/m2 = 1.383 mW/cm2 27. 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 Rt can be determined from the following equation: Transition Region Power Density St = Snf Rnf / Rt (5) = 1.383 mW/cm2

Exhibit Radiation Hazard Report Page 18 of 26 28. 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 Ssr = 4000 P / Asr (6) = 84.648 mW/cm2 29. 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 Ssurface = 4 P / Asurface (7) = 21.221 W/m2 = 2.122 mW/cm2 30. 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) = 5.305 W/m2 = 0.531 mW/cm2

Exhibit Radiation Hazard Report Page 19 of 26 31. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/cm2) Hazard Assessment 1. Far Field (Rff = 41.0 m) Sff 0.592 Satisfies FCC MPE 2. Near Field (Rnf = 17.1 m) Snf 1.383 Potential Hazard 3. Transition Region (Rnf < Rt < Rff) St 1.383 Potential Hazard 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 2.122 Potential Hazard 6. Between Main Reflector and Ground Sg 0.531 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/cm2) Hazard Assessment 1. Far Field (Rff = 41.0 m) Sff 0.592 Satisfies FCC MPE 2. Near Field (Rnf = 17.1 m) Snf 1.383 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 1.383 Satisfies FCC MPE 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 2.122 Satisfies FCC MPE 6. Between Main Reflector and Ground Sg 0.531 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. 32. 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. Radiation hazard signs will be posted while this earth station is in operation and the antennas will be mounted above ground for security reasons, which in turn, will prevent public access in and around the earth station. Means of Compliance Controlled Areas The earth station’s operational staff will not have access to the areas that exceed the MPE levels while the earth station is in operation.

Exhibit Radiation Hazard Report Page 20 of 26 The transmitters will be turned off during antenna maintenance 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 of humans 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 limits for both occupational/controlled exposure and for 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.fcc.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 equipment for worker.

Exhibit Radiation Hazard Report Page 21 of 26 Analysis of Non-Ionizing Radiation for a 1.0-Meter Earth Station System – AZU-Z10Mk2 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/cm2) 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/cm2) 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 1.0 m Antenna Surface Area Asurface π D2 / 4 0.79 m2 Subreflector Diameter Dsr Input 19.0 cm Area of Subreflector Asr π Dsr 2/4 283.53 cm2 Frequency F Input 14250 MHz Wavelength λ 300 / F 0.021053 m Transmit Power P Input 6.00 W Antenna Gain (dBi) Ges Input 41.1 dBi Antenna Gain (factor) G 10Ges/10 12882.5 n/a Pi π Constant 3.1415927 n/a Antenna Efficiency η Gλ2/(π2D2) 0.58 n/a

Exhibit Radiation Hazard Report Page 22 of 26 33. 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 Rff = 0.60 D2 / λ (1) = 28.5 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 Sff = G P / (4 π Rff 2) (2) = 7.573 W/m2 = 0.757 mW/cm2 34. 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 Rnf = D2 / (4 λ) (3) = 11.9 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Snf = 16.0 η P / (π D2) (4) = 17.678 W/m2 = 1.768 mW/cm2 35. 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 Rt can be determined from the following equation: Transition Region Power Density St = Snf Rnf / Rt (5) = 1.768 mW/cm2

Exhibit Radiation Hazard Report Page 23 of 26 36. 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 Ssr = 4000 P / Asr (6) = 84.648 mW/cm2 37. 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 Ssurface = 4 P / Asurface (7) = 30.558 W/m2 = 3.056 mW/cm2 38. 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) = 7.639 W/m2 = 0.764 mW/cm2

Exhibit Radiation Hazard Report Page 24 of 26 39. Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Level Region (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.757 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 1.768 Potential Hazard 3. Transition Region (Rnf < Rt < Rff) St 1.768 Potential Hazard 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Potential Hazard 6. Between Main Reflector and Ground Sg 0.764 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Power Density Region Level (mW/cm2) Hazard Assessment 1. Far Field (Rff = 28.5 m) Sff 0.757 Satisfies FCC MPE 2. Near Field (Rnf = 11.9 m) Snf 1.768 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 1.768 Satisfies FCC MPE 4. Between Main Reflector and Ssr 84.648 Potential Hazard Subreflector 5. Main Reflector Ssurface 3.056 Satisfies FCC MPE 6. Between Main Reflector and Ground Sg 0.764 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. 40. 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. Radiation hazard signs will be posted while this earth station is in operation and the antennas will be mounted above ground for security reasons, which in turn, will prevent public access in and around the earth station. Means of Compliance Controlled Areas The earth station’s operational staff will not have access to the areas that exceed the MPE levels while the earth station is in operation.

Exhibit Radiation Hazard Report Page 25 of 26 The transmitters will be turned off during antenna maintenance 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 of humans 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 limits for both occupational/controlled exposure and for 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.fcc.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 equipment for worker.

Exhibit Radiation Hazard Report Page 26 of 26 I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE PREPARATION OF THE RADIATION HAZARD REPORT, AND THAT IT IS COMPLETE AND CORRECT TO THE BEST OF MY KNOWLEDGE AND BELIEF. BY: _ Gary K. Edwards Senior Manager COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: June 23, 2011


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Document Modified: 2011-06-23 10:03:46
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