Attachment UCSD RadHaz Study

This document pretains to SES-LIC-20100108-00057 for License on a Satellite Earth Station filing.

IBFS_SESLIC2010010800057_792210

Radiation Hazard Study University of California San Diego, Scripps Institution of Oceanography ESV network. This document contains a series of reports that detail the analysis of the potential RF human exposure levels caused by the Electro Magnetic (EM) fields of the antennas to be used in the University of California San Diego, Scripps Institution of Oceanography ESV network. The ESV remote stations include the Seatel models 4006, 4996, and 6006 antennas. The Hub antenna is a Prodelin 3.8 meter antenna. I Seatel 4006 Antenna……………………………………………………….page 2 II Seatel 4996 Antenna…………………………………….…………………page 7 III Seatel 6006 Antenna……………………………………………………….page 12 IV Prodelin 1385 Antenna…………………………………………………….page 17 1

Radiation Hazard Study - Seatel 4006 Antenna 1. Introduction The purpose of this report is to analyze the potential RF human exposure levels caused by the Electro Magnetic (EM) fields of a Seatel 4006 antenna operating with a maximum power at the flange of 0.33 Watts. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65, published in 1985 and revised in 1997 in Edition 97-01. The radiation safety limits used in the following analysis conform to FCC R&O 96-326. Bulletin No. 65. Maximum Permissible Exposure (MPE) There are two separate levels of exposure limits. These depend on the situation where the exposure takes place and the type of individuals who are subject to the exposure. The first level applies to people in the general population who are in an uncontrolled environment. The second level applies to trained personnel in a controlled environment. According to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as follows: General Population / Uncontrolled Exposure 1.0 mW/cm2 Occupational / Controlled Exposure 5.0 mW/cm2 The purpose of this study is to determine the power density levels for the Seatel 4006 antenna and compare them with the published MPE limits. The power density level comparisons are done for six individual regions These regions are: 1. Far-field region 2. Near-field region 3. Transition region 4. The region between the feed and the antenna surface 5. The main reflector region 6. The region between the antenna edge and the ground 2

2. Configuration The antenna under study is a Seatel Model 4006 antenna. It has a diameter of 1.0 meter. 2.1 Input Parameters The following input parameters were used in the calculations: Parameter Unit Symbol Value Antenna Diameter m D 1.0 Antenna Transmit Gain dBi Gant 42.1 Transmit Frequency MHz f 14250 Antenna Feed Flange Diameter cm d 2.9 Power input to Antenna Watts P 0.33 2.2 Calculated Parameters Following are the calculated parameter values and their formulas using the above input parameters. Parameter Unit Symbol Value Formula Antenna Surface Area m2 A .79 πD2/4 Antenna Flange Area cm2 a 6.61 πd2/4 Antenna Efficiency η 0.59 Gλ2/( π2D2) Gain Factor G 13182.6 10G/10 Wavelength m λ 0.0211 300/ f 2.3 Region Definition The effect of exposure to RF radiation depends on the distance from the antenna radiating the energy. The primary area of interest is divided into three regions: Near Field, Far Field, and Transition Region. The limit of the Near Field (Rnf) and the beginning of the Far Field (Rff) are calculated as follows Near Field Distance (Rnf) = D2 / 4λ (Rnf) = (1)2 / 4(0.0211) (Rnf) = 11.85 m 3

Far Field Distance (Rff) = 0.6(D)2 / λ (Rff) = 0.6(1)2 / 0.0211 (Rff) = 28.44 m The distance between the end of the near field and the beginning of the far field is designated as the Transition Region and is expressed as Rnf ≤ Rt ≤ Rff. In this case, the region between 11.85 m and 28.44 m is designated as the Transition Region. However, the power density in this region will not exceed the power in the Near Field region. As a result, for the following calculations the distance of the Transition Region will be equal to the Near Field distance. Transition Region Rt = Rnf (Rnf) = 11.85 m 3. Field Strength 3.1 Near Field Strength The Near Field Power Density is calculated as follows: Snf = 16.0 η P/(πD2) Snf = 16.0 (0.59) (0.33) / (3.14) (12) Snf = 0.099 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1 mW/cm2) and Controlled Environment (5 mW/cm2). 3.2 Transition Region The Power Density in the Transition Region is calculated as follows: St= Snf Rnf /(R) The maximum power density in the transition Region is when R = Rnf, at which point St = Snf = 0.099 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 4

3.3 Far Field Region The Far Field Power Density is calculated as follows: Sff= PG/(4π Rff2) Sff= (0.33) (13182.6) / (4)(3.14) (28.44) Sff= 0.043 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.4 Region between Main Reflector and Subreflector The region between the antenna’s main reflector and subreflector is a conically shaped region defined by the feed assembly which is a waveguide flange. The power density of this region is calculated as follows: Sfa = 4P / a Sfa = 199.7 mW / cm2 This value exceeds the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.5 Power Density at Main Reflector The power density in the main reflector is calculated using the area of the main reflector instead of the feed waveguide flange. Sreflector = 4P / A Sreflector = 16.71 mW / cm2 This value exceeds the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.6 Power Density between Main Reflector and Ground The power density level between the antenna main reflector and the ground is calculated as follows: Sg = P / A Sg = 0.042 mW / cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 5

4. Power Density Summary The values listed in the Power Density Summary table below show that the only regions where the power density exceeds FCC limits are the regions between the Main Reflector and the Subreflector and the Main Reflector Region. These regions are not accessible to the general population since the antennas are mounted inside radomes that have restricted entry access. Also, the antennas are designed to be mounted on pedestals that are typically six feet tall or higher. These regions are only accessible to trained network technicians. These technicians follow a strict set of procedures to work on the antennas that include turning the transmit power off before entering the radome. Consequently, the analysis shows that the Seatel 4006 antenna, operating with an input power level of 0.33 watts at the waveguide flange, and with the proper mitigation procedures in place, complies with the guidelines specified in § 1.1310 of the FCC Regulations. Power Density Region Value Uncontrolled Controlled (mW / cm2) Environment Environment (1 mW / cm2) (5 mW / cm2) Far Field Region .043 Satisfies FCC MPE Satisfies FCC MPE Near Field Region .099 Satisfies FCC MPE Satisfies FCC MPE Transition Region .099 Satisfies FCC MPE Satisfies FCC MPE Main Reflector Region 16.71 Exceeds FCC MPE Exceeds FCC MPE Region between Main and 199.7 Exceeds FCC MPE Exceeds FCC MPE Subreflectors Region between Main 0.042 Satisfies FCC MPE Satisfies FCC MPE Reflector and Ground 6

Radiation Hazard Study - Seatel 4996 Antenna 1. Introduction The purpose of this report is to analyze the potential RF human exposure levels caused by the Electro Magnetic (EM) fields of a Seatel 4996 antenna operating with a maximum power at the flange of 0.245 Watts. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65, published in 1985 and revised in 1997 in Edition 97-01. The radiation safety limits used in the following analysis conform to FCC R&O 96-326. Bulletin No. 65. Maximum Permissible Exposure (MPE) There are two separate levels of exposure limits. These depend on the situation where the exposure takes place and the type of individuals who are subject to the exposure The first level applies to people in the general population who are in an uncontrolled environment. The second level applies to trained personnel in a controlled environment. According to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as follows: General Population / Uncontrolled Exposure 1.0 mW/cm2 Occupational / Controlled Exposure 5.0 mW/cm2 The purpose of this study is to determine the power density levels for the Seatel 4006 antenna and compare them with the published MPE limits. The power density level comparisons are done for six individual regions. These regions are: 1. Far-field region 2. Near-field region 3. Transition region 4. The region between the feed and the antenna surface 5. The main reflector region 6. The region between the antenna edge and the ground 7

2. Configuration The antenna under study is a Seatel Model 4996 antenna. It has a diameter of 1.2 meters. 2.1 Input Parameters The following input parameters were used in the calculations: Parameter Unit Symbol Value Antenna Diameter m D 1.2 Antenna Transmit Gain dBi Gant 42.45 Transmit Frequency MHz f 14250 Antenna Feed Flange Diameter cm d 12.0 Power input to Antenna Watts P 0.245 2.2 Calculated Parameters Following are the calculated parameter values and their formulas using the above input parameters. Parameter Unit Symbol Value Formula Antenna Surface Area m2 A 1.13 πD2/4 Antenna Flange Area cm2 a 113.1 πd2/4 Antenna Efficiency η 0.55 Gλ2/( π2D2) Gain Factor G 17579.2 10G/10 Wavelength m λ 0.0211 300/ f 2.3 Region Definition The effect of exposure to RF radiation depends on the distance from the antenna radiating the energy. The primary area of interest is divided into three regions: Near Field, Far Field, and Transition Region. The limit of the Near Field (Rnf) and the beginning of the Far Field (Rff) are calculated as follows Near Field Distance (Rnf) = D2 / 4λ (Rnf) = (1.2)2 / 4(0.0211) (Rnf) = 17.06 m 8

Far Field Distance (Rff) = 0.6(D)2 / λ (Rff) = 0.6(1.2)2 / 0.0211 (Rff) = 40.95 m The distance between the end of the near field and the beginning of the far field is designated as the Transition Region and is expressed as Rnf ≤ Rt ≤ Rff. In this case, the region between 17.06 m and 40.95 m is designated as the Transition Region. However, the power density in this region will not exceed the power in the Near Field region. As a result, for the following calculations the distance of the Transition Region will be equal to the Near Field distance. Transition Region Rt = Rnf (Rnf) = 17.06 m 3. Field Strength 3.1 Near Field Strength The Near Field Power Density is calculated as follows: Snf = 16.0 η P/(πD2) Snf = 16.0 (0.55) (0.245) / (3.14) (1.22) Snf = 0.048 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1 mW/cm2) and Controlled Environment (5 mW/cm2). 3.2 Transition Region The Power Density in the Transition Region is calculated as follows: St= Snf Rnf /(R) The maximum power density in the transition Region is when R = Rnf, at which point St = Snf = 0.048 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 9

3.3 Far Field Region The Far Field Power Density is calculated as follows: Sff= PG/(4π Rff2) Sff= (0.245) (17579.2) / (4)(3.14) (40.95)2 Sff= 0.020 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.4 Region between Main Reflector and Subreflector The region between the antenna’s main reflector and subreflector is a conically shaped region defined by the feed assembly which is a waveguide flange. The power density of this region is calculated as follows: Sfa = 4P / a Sfa = 8.66 mW / cm 2 This value exceeds the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.5 Power Density at Main Reflector The power density in the main reflector is calculated using the area of the main reflector instead of the feed waveguide flange. Sreflector = 4P / A Sreflector = 0.87 mW / cm 2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.6 Power Density between Main Reflector and Ground The power density level between the antenna main reflector and the ground is calculated as follows: Sg = P / A Sg = 0.22 mW / cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 10

4. Power Density Summary The values listed in the Power Density Summary table below show that the only region where the power density exceeds FCC limits is the region between the Main Reflector and the Subreflector. This region is not accessible to the general population since the antennas are mounted inside radomes that have restricted entry access. Also, the antennas are designed to be mounted on pedestals that are typically six feet tall or higher. This region is only accessible to trained network technicians. These technicians follow a strict set of procedures to work on the antennas that include turning the transmit power off before entering the radome. Consequently, the analysis shows that the Seatel 4996 antenna, operating with an input power level of 0.245 watts at the waveguide flange, and with the proper mitigation procedures in place, complies with the guidelines specified in § 1.1310 of the FCC Regulations. Power Density Region Value Uncontrolled Controlled (mW / cm2) Environment Environment (1 mW / cm2) (5 mW / cm2) Far Field Region .0020 Satisfies FCC MPE Satisfies FCC MPE Near Field Region .048 Satisfies FCC MPE Satisfies FCC MPE Transition Region .048 Satisfies FCC MPE Satisfies FCC MPE Main Reflector Region 0.87 Satisfies FCC MPE Satisfies FCC MPE Region between Main and 8.66 Exceeds FCC MPE Exceeds FCC MPE Subreflectors Region between Main 0.22 Satisfies FCC MPE Satisfies FCC MPE Reflector and Ground 11

Radiation Hazard Study - Seatel 6006 Antenna 1. Introduction The purpose of this report is to analyze the potential RF human exposure levels caused by the Electro Magnetic (EM) fields of a Seatel 6006 antenna operating with a maximum power at the flange of 0.233 Watts. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65, published in 1985 and revised in 1997 in Edition 97-01. The radiation safety limits used in the following analysis conform to FCC R&O 96-326. Bulletin No. 65. Maximum Permissible Exposure (MPE) There are two separate levels of exposure limits. These depend on the situation where the exposure takes place and the type of individuals who are subject to the exposure. The first level applies to people in the general population who are in an uncontrolled environment. The second level applies to trained personnel in a controlled environment. According to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as follows: General Population / Uncontrolled Exposure 1.0 mW/cm2 Occupational / Controlled Exposure 5.0 mW/cm2 The purpose of this study is to determine the power density levels for the Seatel 4006 antenna and compare them with the published MPE limits. The power density level comparisons are done for six individual regions. These regions are: 1. Far-field region 2. Near-field region 3. Transition region 4. The region between the feed and the antenna surface 5. The main reflector region 6. The region between the antenna edge and the ground 12

2. Configuration The antenna under study is a Seatel Model 6006 antenna. It has a diameter of 1.5 meters. 2.1 Input Parameters The following input parameters were used in the calculations: Parameter Unit Symbol Value Antenna Diameter m D 1.5 Antenna Transmit Gain dBi Gant 42.75 Transmit Frequency MHz f 14250 Antenna Feed Flange Diameter cm d 5.08 Power input to Antenna Watts P 0.233 2.2 Calculated Parameters Following are the calculated parameter values and their formulas using the above input parameters. Parameter Unit Symbol Value Formula Antenna Surface Area m2 A 1.77 πD2/4 Antenna Flange Area cm2 a 20.27 πd2/4 Antenna Efficiency η 0.41 Gλ2/( π2D2) Gain Factor G 18836.5 10G/10 Wavelength m λ 0.0211 300/ f 2.3 Region Definition The effect of exposure to RF radiation depends on the distance from the antenna radiating the energy. The primary area of interest is divided into three regions: Near Field, Far Field, and Transition Region. The limit of the Near Field (Rnf) and the beginning of the Far Field (Rff) are calculated as follows Near Field Distance (Rnf) = D2 / 4λ (Rnf) = (1.5)2 / 4(0.0211) (Rnf) = 26.7 m 13

Far Field Distance (Rff) = 0.6(D)2 / λ (Rff) = 0.6(1.5)2 / 0.0211 (Rff) = 64.1 m The distance between the end of the near field and the beginning of the far field is designated as the Transition Region and is expressed as Rnf ≤ Rt ≤ Rff. In this case, the region between 26.7 m and 64.1 m is designated as the Transition Region. However, the power density in this region will not exceed the power in the Near Field region. As a result, for the following calculations the distance of the Transition Region will be equal to the Near Field distance. Transition Region Rt = Rnf (Rnf) = 26.7 m 3. Field Strength 3.1 Near Field Strength The Near Field Power Density is calculated as follows: Snf = 16.0 η P/(πD2) Snf = 16.0 (0.41) (0.233) / (3.14) (1.52) Snf = 0.022 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1 mW/cm2) and Controlled Environment (5 mW/cm2). 3.2 Transition Region The Power Density in the Transition Region is calculated as follows: St= Snf Rnf /(R) The maximum power density in the transition Region is when R = Rnf, at which point St = Snf = 0.022 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 14

3.3 Far Field Region The Far Field Power Density is calculated as follows: Sff= PG/(4π Rff2) Sff= (0.233) (18836.5) / (4)(3.14) (64.1) Sff= 0.0085 mW/cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.4 Region between Main Reflector and Subreflector The region between the antenna’s main reflector and subreflector is a conically shaped region defined by the feed assembly which is a waveguide flange. The power density of this region is calculated as follows: Sfa = 4P / a Sfa = 45.98 mW / cm 2 This value exceeds the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.5 Power Density at Main Reflector The power density in the main reflector is calculated using the area of the main reflector instead of the feed waveguide flange. Sreflector = 4P / A Sreflector = 0.53 mW / cm 2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 15

3.6 Power Density between Main Reflector and Ground The power density level between the antenna main reflector and the ground is calculated as follows: Sg = P / A Sg = .013 mW / cm2 This value satisfies the FCC MPE requirement for the Uncontrolled Environment (1.0 mW/cm2) and satisfies Controlled Environment (5.0 mW/cm2) 4. Power Density Summary The values listed in the Power Density Summary table below show that the only region where the power density exceeds FCC limits is the region between the Main Reflector and the Subreflector. This region is not accessible to the general population since the antennas are mounted inside radomes that have restricted entry access. Also, the antennas are designed to be mounted on pedestals that are typically six feet tall or higher. This region is only accessible to trained network technicians. These technicians follow a strict set of procedures to work on the antennas that include turning the transmit power off before entering the radome. Consequently, the analysis shows that the Seatel 6006 antenna, operating with an input power level of 0.233 watts at the waveguide flange, and with the proper mitigation procedures in place, complies with the guidelines specified in § 1.1310 of the FCC Regulations. Power Density Region Value Uncontrolled Controlled (mW / cm2) Environment Environment (1 mW / cm2) (5 mW / cm2) Far Field Region .0085 Satisfies FCC MPE Satisfies FCC MPE Near Field Region .022 Satisfies FCC MPE Satisfies FCC MPE Transition Region .022 Satisfies FCC MPE Satisfies FCC MPE Main Reflector Region 0.53 Satisfies FCC MPE Satisfies FCC MPE Region between Main and 45.98 Exceeds FCC MPE Exceeds FCC MPE Subreflectors Region between Main 0.013 Satisfies FCC MPE Satisfies FCC MPE Reflector and Ground 16

Radiation Hazard Study – Prodelin 1383 Antenna 1. Introduction The purpose of this report is to analyze the potential RF human exposure levels caused by the Electro Magnetic (EM) fields of a Prodelin Model 1383 antenna operating with a maximum power at the flange of 0.755 Watts. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65, published in 1985 and revised in 1997 in Edition 97-01. The radiation safety limits used in the following analysis conform to FCC R&O 96-326. Bulletin No. 65. Maximum Permissible Exposure (MPE) There are two separate levels of exposure limits. These depend on the situation where the exposure takes place and the type of individuals who are subject to the exposure. The first level applies to people in the general population who are in an uncontrolled environment. The second level applies to trained personnel in a controlled environment. According to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as follows: General Population / Uncontrolled Exposure 1.0 mW/cm2 Occupational / Controlled Exposure 5.0 mW/cm2 The purpose of this study is to determine the power density levels for the Prodelin 1383 antenna and compare them with the published MPE limits. The power density level comparisons are done for six individual regions. These regions are: 1. Far-field region 2. Near-field region 3. Transition region 4. The region between the feed and the antenna surface 5. The main reflector region 6. The region between the antenna edge and the ground 17

2. Configuration The antenna under study is a Prodelin 1383 antenna. It has a diameter of 3.8 meters. 2.1 Input Parameters The following input parameters were used in the calculations: Parameter Unit Symbol Value Antenna Diameter m D 3.8 Antenna Transmit Gain dBi Gant 53.2 Transmit Frequency MHz f 14250 Antenna Feed Flange Diameter cm d 18.0 Power input to Antenna Watts P 0.755 2.2 Calculated Parameters Following are the calculated parameter values and their formulas using the above input parameters. Parameter Unit Symbol Value Formula Antenna Surface Area m2 A 11.34 πD2/4 Antenna Flange Area cm2 a 254.34 πd2/4 Antenna Efficiency η 0.65 Gλ2/( π2D2) Gain Factor G 208929.6 10G/10 Wavelength m λ 0.0211 300/ f 2.3 Region Definition The effect of exposure to RF radiation depends on the distance from the antenna radiating the energy. The primary are of interest is divided into three regions: Near Field, Far Field, and Transition Region. The limit of the Near Field (Rnf) and the beginning of the Far Field (Rff) are calculated as follows Near Field Distance (Rnf) = D2 / 4λ (Rnf) = (3.8)2 / 4(0.0211) (Rnf) = 171.10 m 18

Far Field Distance (Rff) = 0.6(D)2 / λ (Rff) = 0.6(3.8)2 / 0.0211 (Rff) = 410.62 m The distance between the end of the near field and the beginning of the far field is designated as the transition Region and is expressed as Rnf ≤ Rt ≤ Rff. In this case, the region between 171.1 m and 410.62 m is designated as the Transition Region. However, the power density in this region will not exceed the power in the Near Field region. As a result, for the following calculations the distance of the Transition Region will be equal to the Near Field distance. Transition Region Rt = Rnf (Rnf) = 171.10 m 3. Field Strength 3.7 Near Field Strength The Near Field Power Density is calculated as follows: Snf = 16.0 η P/(πD2) Snf = 16.0 (0.65) (0.755) / (3.14) (3.82) Snf = 0.017 mW / cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1 mW/cm2) and Controlled Environment (5 mW/cm2). 3.8 Transition Region The Power Density in the Transition Region is calculated as follows: St= Snf Rnf /(R) The maximum power density in the transition Region is when R = Rnf, at which point St = Snf = 0.017 mW / cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 19

3.9 Far Field Region The Far Field Power Density is calculated as follows: Sff= PG/(4π Rff2) Sff= (0.755) (208929.6) / (4)(3.14) (410.622) Sff= 0.0074 mW / cm2 This value satisfies the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.10 Region between Main Reflector and Subreflector The region between the antenna’s main reflector and subreflector is a conically shaped region defined by the feed assembly which is a waveguide flange. The power density of this region is calculated as follows: Sfa = 4P / a Sfa = 11.87 mW / cm 2 This value exceeds the FCC MPE requirement for both the Uncontrolled Environment (1.0 mW/cm2) and Controlled Environment (5.0 mW/cm2). 3.11 Power Density at Main Reflector The power density in the main reflector is calculated using the area of the main reflector instead of the feed waveguide flange. Sreflector = 4P / A Sreflector = 2.66 mW / cm 2 This value exceeds the FCC MPE requirement for the Uncontrolled Environment (1.0 mW/cm2) and satisfies the FCC MPE requirement for Controlled Environment (5.0 mW/cm2). 20

3.12 Power Density between Main Reflector and Ground The power density level between the antenna main reflector and the ground is calculated as follows: Sg = P / A Sg = 0.66 mW / cm2 This value satisfies the FCC MPE requirement for the Uncontrolled Environment (1.0 mW/cm2) and satisfies Controlled Environment (5.0 mW/cm2) 4. Power Density Summary The values listed in the Power Density Summary table below show that the only region where the power density exceeds FCC limits for both Uncontrolled and Controlled Environments is the region between the Main Reflector and the Subreflector. In addition, the value of the Main Reflector region exceeds the FCC limit for Uncontrolled Environment. These regions are not accessible to the general population since the antenna will be located in a restricted rooftop area controlled by building security personnel. Only network engineers and other authorized personnel will have access to the antenna location. This antenna will only be accessible to trained network technicians. These technicians follow a strict set of procedures to work on the antennas that include turning the transmit power off before entering the radome. Consequently, the analysis shows that the Seatel 6006 antenna, operating with an input power level of 0.755 watts at the waveguide flange, and with the proper mitigation procedures in place, complies with the guidelines specified in § 1.1310 of the FCC Regulations. Power Density Region Value Uncontrolled Controlled (mW / cm2) Environment Environment (1 mW / cm2) (5 mW / cm2) Far Field Region .0074 Satisfies FCC MPE Satisfies FCC MPE Near Field Region .017 Satisfies FCC MPE Satisfies FCC MPE Transition Region .017 Satisfies FCC MPE Satisfies FCC MPE Main Reflector Region 2.66 Exceeds FCC MPE Satisfies FCC MPE Region between Main and 11.87 Exceeds FCC MPE Exceeds FCC MPE Subreflectors Region between Main 0.66 Satisfies FCC MPE Satisfies FCC MPE Reflector and Ground 21


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