Attachment Technical Appendix

This document pretains to SES-STA-20190724-00973 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2019072400973_1814455

I. FREQUENCY COORDINATION REPORTS Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 SUPPLEMENTAL SHOWING PART 101.103(D) File Number: M1909812 5.93 GHz Licensee: Alaska Communications Internet, LLC Page 1 _____________________________________________________________________________________ Pursuant to Parts 25.203 and 101.103(d) of the FCC Rules and Regulations, a frequency coordination study was conducted by Micronet Communications, Inc. for the following proposed earth station: Trident Naknek, AK The results of the study indicate that no unacceptable interference will result with existing, proposed or prior coordinated radio facilities. Coordination was performed with existing, proposed and prior coordinated carriers within coordination range on the following dates: 04/16/2019 Original PCN (Expedited response requested by 04/30/2019) There were no unresolved interference objections. 05/2/2019 Major Mod (Expedited response requested by 05/06/2019) There were no unresolved interference objections. The attached coordination data was forwarded on the latest date to the following parties within coordination range or their authorized coordination agents: NUSHAGAK ELECTRIC AND TELEPHONE COOPERATIVE INC. RADIO DYNAMICS UNITED UTILITIES, INC. WIRELESS APPLICATIONS CORP Respectfully Submitted, Jeremy Boyce Systems Engineer Attached: 1 data sheet

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 File: M1909812 ========================================================================== TECHNICAL CHARACTERISTICS OF TRANSMIT RECEIVE EARTH STATION ========================================================================== Company: Alaska Communications Internet, LLC Site Name, State: Trident Naknek, AK Call Sign: E170205 Latitude (NAD83) 58 43 41.4 N Longitude (NAD83) 157 0 26.2 W Elevation AMSL (ft/m) 9.84 3.00 Receive Frequency Range (MHz) 3700-4200 Transmit Frequency Range (MHz) 5925-6425 Range of Satellite Orbital Long. (deg W) 114.00 116.00 Range of Azimuths from North (deg) 132.50 134.51 Antenna Centerline (ft/m) 5.91 1.80 Antenna Elevation Angles (deg) 13.88 14.67 -------------------------------------------------------------------------- Equipment Parameters Receive Transmit -------------------------------------------------------------------------- Antenna Gain, Main Beam (dbI) 38.00 42.00 15 DB Half Beamwidth (deg) 2.45 1.65 Antennas Receive: GENERAL DYNAMICS 1251 (2.4M) Transmit: GENERAL DYNAMICS 1251 (2.4M) Max Transmitter Power (dbW/4KHz) -12.46 Max EIRP Main Beam (dbW/4KHz) 29.54 Modulation / Emission Designator DIGITAL 5M60G7W 72M0G7W -------------------------------------------------------------------------- Coordination Parameters Receive Transmit -------------------------------------------------------------------------- Max Greater Circle Distances (km) 444.36 172.59 Max Rain Scatter Distances (km) 373.72 100.00 Max Interference Power Long Term (dbW) -158.60 -154.80 Max Interference Power Short Term (dbW) -149.90 -130.80 Rain Zone / Radio Zone 3 A

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 SUPPLEMENTAL SHOWING PART 101.103(D) File Number: N1909812 5.93 GHz Licensee: Alaska Communications Internet, LLC Page 1 _____________________________________________________________________________________ Pursuant to Parts 25.203 and 101.103(d) of the FCC Rules and Regulations, a frequency coordination study was conducted by Micronet Communications, Inc. for the following proposed earth station: Trident Akutan, AK The results of the study indicate that no unacceptable interference will result with existing, proposed or prior coordinated radio facilities. Coordination was performed with existing, proposed and prior coordinated carriers within coordination range on the following dates: 04/16/2019 Original PCN (Expedited response requested by 04/30/2019) There were no unresolved interference objections. 05/2/2019 Major Mod (Expedited response requested by 05/06/2019) There were no unresolved interference objections. The attached coordination data was forwarded on the latest date to the following parties within coordination range or their authorized coordination agents: (No licensees within range) Respectfully Submitted, Jeremy Boyce Systems Engineer Attached: 1 data sheet

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 File: N1909812 ========================================================================== TECHNICAL CHARACTERISTICS OF TRANSMIT RECEIVE EARTH STATION ========================================================================== Company: Alaska Communications Internet, LLC Site Name, State: Trident Akutan, AK Call Sign: E170205 Latitude (NAD83) 54 7 59.3 N Longitude (NAD83) 165 47 22.1 W Elevation AMSL (ft/m) 18.96 5.78 Receive Frequency Range (MHz) 3700-4200 Transmit Frequency Range (MHz) 5925-6425 Range of Satellite Orbital Long. (deg W) 114.00 116.00 Range of Azimuths from North (deg) 122.54 124.41 Antenna Centerline (ft/m) 20.01 6.10 Antenna Elevation Angles (deg) 12.78 13.80 -------------------------------------------------------------------------- Equipment Parameters Receive Transmit -------------------------------------------------------------------------- Antenna Gain, Main Beam (dbI) 38.00 42.00 15 DB Half Beamwidth (deg) 2.45 1.65 Antennas Receive: GENERAL DYNAMICS 1251 (2.4M) Transmit: GENERAL DYNAMICS 1251 (2.4M) Max Transmitter Power (dbW/4KHz) -9.46 Max EIRP Main Beam (dbW/4KHz) 32.54 Modulation / Emission Designator DIGITAL 5M60G7W 72M0G7W -------------------------------------------------------------------------- Coordination Parameters Receive Transmit -------------------------------------------------------------------------- Max Greater Circle Distances (km) 452.37 186.30 Max Rain Scatter Distances (km) 376.27 100.00 Max Interference Power Long Term (dbW) -158.60 -154.80 Max Interference Power Short Term (dbW) -149.90 -130.80 Rain Zone / Radio Zone 3 A

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 SUPPLEMENTAL SHOWING PART 101.103(D) File Number: R1909812 5.93 GHz Licensee: Alaska Communications Internet, LLC Page 1 _____________________________________________________________________________________ Pursuant to Parts 25.203 and 101.103(d) of the FCC Rules and Regulations, a frequency coordination study was conducted by Micronet Communications, Inc. for the following proposed earth station: Trident Sand Point, AK The results of the study indicate that no unacceptable interference will result with existing, proposed or prior coordinated radio facilities. Coordination was performed with existing, proposed and prior coordinated carriers within coordination range on the following dates: 04/16/2019 Original PCN (Expedited response requested by 04/30/2019) There were no unresolved interference objections. 05/2/2019 Major Mod (Expedited response requested by 05/06/2019) There were no unresolved interference objections. The attached coordination data was forwarded on the latest date to the following parties within coordination range or their authorized coordination agents: (No licensees within range) Respectfully Submitted, Jeremy Boyce Systems Engineer Attached: 1 data sheet

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 File: R1909812 ========================================================================== TECHNICAL CHARACTERISTICS OF TRANSMIT RECEIVE EARTH STATION ========================================================================== Company: Alaska Communications Internet, LLC Site Name, State: Trident Sand Point, AK Call Sign: E170205 Latitude (NAD83) 55 20 10.9 N Longitude (NAD83) 160 30 8.3 W Elevation AMSL (ft/m) 9.84 3.00 Receive Frequency Range (MHz) 3700-4200 Transmit Frequency Range (MHz) 5925-6425 Range of Satellite Orbital Long. (deg W) 114.00 116.00 Range of Azimuths from North (deg) 127.97 129.93 Antenna Centerline (ft/m) 5.91 1.80 Antenna Elevation Angles (deg) 14.65 15.57 -------------------------------------------------------------------------- Equipment Parameters Receive Transmit -------------------------------------------------------------------------- Antenna Gain, Main Beam (dbI) 38.00 42.00 15 DB Half Beamwidth (deg) 2.45 1.65 Antennas Receive: GENERAL DYNAMICS 1251 (2.4M) Transmit: GENERAL DYNAMICS 1251 (2.4M) Max Transmitter Power (dbW/4KHz) -9.46 Max EIRP Main Beam (dbW/4KHz) 32.54 Modulation / Emission Designator DIGITAL 5M60G7W 72M0G7W -------------------------------------------------------------------------- Coordination Parameters Receive Transmit -------------------------------------------------------------------------- Max Greater Circle Distances (km) 439.61 181.04 Max Rain Scatter Distances (km) 372.18 100.00 Max Interference Power Long Term (dbW) -158.60 -154.80 Max Interference Power Short Term (dbW) -149.90 -130.80 Rain Zone / Radio Zone 3 A

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 SUPPLEMENTAL SHOWING PART 101.103(D) File Number: T1909812 5.93 GHz Licensee: Alaska Communications Internet, LLC Page 1 _____________________________________________________________________________________ Pursuant to Parts 25.203 and 101.103(d) of the FCC Rules and Regulations, a frequency coordination study was conducted by Micronet Communications, Inc. for the following proposed earth station: Pebble Mine Illiamna, AK The results of the study indicate that no unacceptable interference will result with existing, proposed or prior coordinated radio facilities. Coordination was performed with existing, proposed and prior coordinated carriers within coordination range on the following dates: 04/16/2019 Original PCN (Expedited response requested by 04/30/2019) There were no unresolved interference objections. 05/02/2019 Major Mod (Expedited response requested by 05/06/2019) There were no unresolved interference objections. The attached coordination data was forwarded on the latest date to the following parties within coordination range or their authorized coordination agents: COMSEARCH INC NUSHAGAK ELECTRIC AND TELEPHONE COOPERATIVE INC. RADIO DYNAMICS UNITED UTILITIES, INC. WIRELESS APPLICATIONS CORP Respectfully Submitted, Jeremy Boyce Systems Engineer Attached: 1 data sheet

Micronet Communications, Inc. 812 Lexington Dr Plano, Texas 75075 972-422-7200 File: T1909812 ========================================================================== TECHNICAL CHARACTERISTICS OF TRANSMIT RECEIVE EARTH STATION ========================================================================== Company: Alaska Communications Internet, LLC Site Name, State: Pebble Mine Illiamna, AK Call Sign: E170205 Latitude (NAD83) 59 45 26.0 N Longitude (NAD83) 154 54 22.8 W Elevation AMSL (ft/m) 150.07 45.74 Receive Frequency Range (MHz) 3700-4200 Transmit Frequency Range (MHz) 5925-6425 Range of Satellite Orbital Long. (deg W) 114.00 116.00 Range of Azimuths from North (deg) 134.92 136.95 Antenna Centerline (ft/m) 5.91 1.80 Antenna Elevation Angles (deg) 13.95 14.68 -------------------------------------------------------------------------- Equipment Parameters Receive Transmit -------------------------------------------------------------------------- Antenna Gain, Main Beam (dbI) 38.00 42.00 15 DB Half Beamwidth (deg) 2.45 1.65 Antennas Receive: GENERAL DYNAMICS 1241 (2.4M) Transmit: GENERAL DYNAMICS 1241 (2.4M) Max Transmitter Power (dbW/4KHz) -12.46 Max EIRP Main Beam (dbW/4KHz) 29.54 Modulation / Emission Designator DIGITAL 5M60G7W 72M0G7W -------------------------------------------------------------------------- Coordination Parameters Receive Transmit -------------------------------------------------------------------------- Max Greater Circle Distances (km) 445.44 172.99 Max Rain Scatter Distances (km) 373.58 100.00 Max Interference Power Long Term (dbW) -158.60 -154.80 Max Interference Power Short Term (dbW) -149.90 -130.80 Rain Zone / Radio Zone 3 A

II. RADIATION HAZARD ANALYSES ANALYSIS OF NON-IONIZING RADIATION for Alaska Communications Internet LLC Site: Trident Naknek State: AK Latitude: 58 43 41.4 Longitude: 157 0 26.2 (NAD83) 05-02-2019 The Office of Science and Technology Bulletin, No. 65, October 1985 and revised August 1997, specifies that the maximum level of non-ionizing radiation that a person may be exposed to over a six minute period is an average power density equal to 5 mW/cm**2 (five milliwatts per centimeter squared) for a controlled environment. For an uncontrolled environment, the maximum level of non-ionizing radiation that a person may be exposed to over a thirty minute period is an average power density equal to 1 mW/cm**2 (one milliwatt per centimeter squared). It is the purpose of this report to determine the maximum power flux densities of the earth station in the far zone, near zone, transition zone, at the main reflector surface, and between the antenna edge and the ground. Parameters which were used in the calculations: =============================================== Antenna Diameter, (D) = 2.4000 m Antenna Surface Area (Sa) = pi(D**2)/4 = 4.5239 m**2 Wavelength at 6.1750 GHz (lambda) = 0.0485 m Transmit Power at Flange (P) = 20.0000 Watts Antenna Gain at Earth Site (GES) = 42.0000 dBi = 15848.9319 Power Ratio: AntiLog(GES/10) pi = 3.1415927 Antenna Aperture Efficiency (n) = 0.6000

1. FAR ZONE CALCULATIONS ======================== Distance to the Far Zone (Df) = (n)(D**2) = 71.2577 m --------- lambda Far Zone Power Density (Rf) = (GES)(P) = 4.9677 W/m**2 ------------ 4*pi*(Df**2) = 0.4968 mW/cm**2 2. NEAR ZONE CALCULATIONS ========================= Power Flux Density is considered to be at a maximum value throughout the entire length of this Zone. The Zone is contained within a cylindrical volume which has the same diameter as the antenna. Beyond the Near Zone, the Power Flux Density will decrease with distance from the Antenna. Distance to the Near Zone (Dn) = D**2 = 29.6907 m -------- 4*lambda Near Zone Power Density (Rn) = 16.0(n)P = 10.6103 W/m**2 -------- pi(D**2) = 1.0610 mW/cm**2 3. TRANSITION ZONE CALCULATIONS =============================== The Power Density begins to decrease with distance in the Transition Zone. While the Power Density decreases inversely with distance in the Transition Zone, the Power Density decreases inversely with the square of the distance in the Far Zone. Since the maximum Power Density in the Transition Zone will not exceed the Near Zone values, it is not calculated.

4. MAIN REFLECTOR ZONE ====================== Main Reflector Power Density = 2(P) = 8.8419 W/m**2 ---- Sa = 0.8842 mW/cm**2 5. ZONE BETWEEN THE MAIN REFLECTOR AND THE GROUND ================================================= Applying uniform illumination of the Main Reflector Surface: Main to Ground Power Density = P = 4.4210 W/m**2 ---- Sa = 0.4421 mW/cm**2

CALCULATED SAFETY MARGINS SUMMARY AND EVALUATION -------------------------------------------------------------------------- Controlled Safety Margin = 5.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 4.5032 Complies with ANSI 2. Near Zone 3.9390 Complies with ANSI 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface 4.1158 Complies with ANSI 5. Main Reflector to Ground 4.5579 Complies with ANSI -------------------------------------------------------------------------- Uncontrolled Safety Margin = 1.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 0.5032 Complies with ANSI 2. Near Zone -0.0610 POTENTIALLY HAZARDOUS 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface 0.1158 Complies with ANSI 5. Main Reflector to Ground 0.5579 Complies with ANSI 6. EVALUATION ============== A. Controlled Environment B. Uncontrolled Environment The NEAR ZONE does not comply with the ANSI standards! The system will be FENCED so that no one can enter the affected Zone while the system is in use. Additionally, the system will be shut down for servicing.

ANALYSIS OF NON-IONIZING RADIATION for Alaska Communications Internet LLC Site: Trident Akutan State: AK Latitude: 54 7 59.3 Longitude: 165 47 22.1 (NAD83) 05-02-2019 The Office of Science and Technology Bulletin, No. 65, October 1985 and revised August 1997, specifies that the maximum level of non-ionizing radiation that a person may be exposed to over a six minute period is an average power density equal to 5 mW/cm**2 (five milliwatts per centimeter squared) for a controlled environment. For an uncontrolled environment, the maximum level of non-ionizing radiation that a person may be exposed to over a thirty minute period is an average power density equal to 1 mW/cm**2 (one milliwatt per centimeter squared). It is the purpose of this report to determine the maximum power flux densities of the earth station in the far zone, near zone, transition zone, at the main reflector surface, and between the antenna edge and the ground. Parameters which were used in the calculations: =============================================== Antenna Diameter, (D) = 2.4000 m Antenna Surface Area (Sa) = pi(D**2)/4 = 4.5239 m**2 Wavelength at 6.1750 GHz (lambda) = 0.0485 m Transmit Power at Flange (P) = 40.0000 Watts Antenna Gain at Earth Site (GES) = 42.0000 dBi = 15848.9319 Power Ratio: AntiLog(GES/10) pi = 3.1415927 Antenna Aperture Efficiency (n) = 0.6000

1. FAR ZONE CALCULATIONS ======================== Distance to the Far Zone (Df) = (n)(D**2) = 71.2577 m --------- lambda Far Zone Power Density (Rf) = (GES)(P) = 9.9354 W/m**2 ------------ 4*pi*(Df**2) = 0.9935 mW/cm**2 2. NEAR ZONE CALCULATIONS ========================= Power Flux Density is considered to be at a maximum value throughout the entire length of this Zone. The Zone is contained within a cylindrical volume which has the same diameter as the antenna. Beyond the Near Zone, the Power Flux Density will decrease with distance from the Antenna. Distance to the Near Zone (Dn) = D**2 = 29.6907 m -------- 4*lambda Near Zone Power Density (Rn) = 16.0(n)P = 21.2207 W/m**2 -------- pi(D**2) = 2.1221 mW/cm**2 3. TRANSITION ZONE CALCULATIONS =============================== The Power Density begins to decrease with distance in the Transition Zone. While the Power Density decreases inversely with distance in the Transition Zone, the Power Density decreases inversely with the square of the distance in the Far Zone. Since the maximum Power Density in the Transition Zone will not exceed the Near Zone values, it is not calculated.

4. MAIN REFLECTOR ZONE ====================== Main Reflector Power Density = 2(P) = 17.6839 W/m**2 ---- Sa = 1.7684 mW/cm**2 5. ZONE BETWEEN THE MAIN REFLECTOR AND THE GROUND ================================================= Applying uniform illumination of the Main Reflector Surface: Main to Ground Power Density = P = 8.8419 W/m**2 ---- Sa = 0.8842 mW/cm**2

CALCULATED SAFETY MARGINS SUMMARY AND EVALUATION -------------------------------------------------------------------------- Controlled Safety Margin = 5.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 4.0065 Complies with ANSI 2. Near Zone 2.8779 Complies with ANSI 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface 3.2316 Complies with ANSI 5. Main Reflector to Ground 4.1158 Complies with ANSI -------------------------------------------------------------------------- Uncontrolled Safety Margin = 1.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 0.0065 Complies with ANSI 2. Near Zone -1.1221 POTENTIALLY HAZARDOUS 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface -0.7684 POTENTIALLY HAZARDOUS 5. Main Reflector to Ground 0.1158 Complies with ANSI 6. EVALUATION ============== A. Controlled Environment B. Uncontrolled Environment The NEAR ZONE does not comply with the ANSI standards! The system will be FENCED so that no one can enter the affected Zone while the system is in use. Additionally, the system will be shut down for servicing. The MAIN Reflector Surface ZONE does not comply with the ANSI standards! The system will be FENCED so that no one can enter the affected Zone while the system is in use. Additionally, the system will be shut down for servicing.

ANALYSIS OF NON-IONIZING RADIATION for Alaska Communications Internet LLC Site: Trident Sand Point State: AK Latitude: 55 20 10.9 Longitude: 160 30 8.3 (NAD83) 05-02-2019 The Office of Science and Technology Bulletin, No. 65, October 1985 and revised August 1997, specifies that the maximum level of non-ionizing radiation that a person may be exposed to over a six minute period is an average power density equal to 5 mW/cm**2 (five milliwatts per centimeter squared) for a controlled environment. For an uncontrolled environment, the maximum level of non-ionizing radiation that a person may be exposed to over a thirty minute period is an average power density equal to 1 mW/cm**2 (one milliwatt per centimeter squared). It is the purpose of this report to determine the maximum power flux densities of the earth station in the far zone, near zone, transition zone, at the main reflector surface, and between the antenna edge and the ground. Parameters which were used in the calculations: =============================================== Antenna Diameter, (D) = 2.4000 m Antenna Surface Area (Sa) = pi(D**2)/4 = 4.5239 m**2 Wavelength at 6.1750 GHz (lambda) = 0.0485 m Transmit Power at Flange (P) = 40.0000 Watts Antenna Gain at Earth Site (GES) = 42.0000 dBi = 15848.9319 Power Ratio: AntiLog(GES/10) pi = 3.1415927 Antenna Aperture Efficiency (n) = 0.6000

1. FAR ZONE CALCULATIONS ======================== Distance to the Far Zone (Df) = (n)(D**2) = 71.2577 m --------- lambda Far Zone Power Density (Rf) = (GES)(P) = 9.9354 W/m**2 ------------ 4*pi*(Df**2) = 0.9935 mW/cm**2 2. NEAR ZONE CALCULATIONS ========================= Power Flux Density is considered to be at a maximum value throughout the entire length of this Zone. The Zone is contained within a cylindrical volume which has the same diameter as the antenna. Beyond the Near Zone, the Power Flux Density will decrease with distance from the Antenna. Distance to the Near Zone (Dn) = D**2 = 29.6907 m -------- 4*lambda Near Zone Power Density (Rn) = 16.0(n)P = 21.2207 W/m**2 -------- pi(D**2) = 2.1221 mW/cm**2 3. TRANSITION ZONE CALCULATIONS =============================== The Power Density begins to decrease with distance in the Transition Zone. While the Power Density decreases inversely with distance in the Transition Zone, the Power Density decreases inversely with the square of the distance in the Far Zone. Since the maximum Power Density in the Transition Zone will not exceed the Near Zone values, it is not calculated.

4. MAIN REFLECTOR ZONE ====================== Main Reflector Power Density = 2(P) = 17.6839 W/m**2 ---- Sa = 1.7684 mW/cm**2 5. ZONE BETWEEN THE MAIN REFLECTOR AND THE GROUND ================================================= Applying uniform illumination of the Main Reflector Surface: Main to Ground Power Density = P = 8.8419 W/m**2 ---- Sa = 0.8842 mW/cm**2

CALCULATED SAFETY MARGINS SUMMARY AND EVALUATION -------------------------------------------------------------------------- Controlled Safety Margin = 5.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 4.0065 Complies with ANSI 2. Near Zone 2.8779 Complies with ANSI 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface 3.2316 Complies with ANSI 5. Main Reflector to Ground 4.1158 Complies with ANSI -------------------------------------------------------------------------- Uncontrolled Safety Margin = 1.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 0.0065 Complies with ANSI 2. Near Zone -1.1221 POTENTIALLY HAZARDOUS 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface -0.7684 POTENTIALLY HAZARDOUS 5. Main Reflector to Ground 0.1158 Complies with ANSI 6. EVALUATION ============== A. Controlled Environment B. Uncontrolled Environment The NEAR ZONE does not comply with the ANSI standards! The system will be FENCED so that no one can enter the affected Zone while the system is in use. Additionally, the system will be shut down for servicing. The MAIN Reflector Surface ZONE does not comply with the ANSI standards! The system will be FENCED so that no one can enter the affected Zone while the system is in use. Additionally, the system will be shut down for servicing.

ANALYSIS OF NON-IONIZING RADIATION for Alaska Communications Internet LLC Site: Pebble Mine Illiamna State: AK Latitude: 59 45 25.9 Longitude: 154 54 22.8 (NAD83) 05-02-2019 The Office of Science and Technology Bulletin, No. 65, October 1985 and revised August 1997, specifies that the maximum level of non-ionizing radiation that a person may be exposed to over a six minute period is an average power density equal to 5 mW/cm**2 (five milliwatts per centimeter squared) for a controlled environment. For an uncontrolled environment, the maximum level of non-ionizing radiation that a person may be exposed to over a thirty minute period is an average power density equal to 1 mW/cm**2 (one milliwatt per centimeter squared). It is the purpose of this report to determine the maximum power flux densities of the earth station in the far zone, near zone, transition zone, at the main reflector surface, and between the antenna edge and the ground. Parameters which were used in the calculations: =============================================== Antenna Diameter, (D) = 2.4000 m Antenna Surface Area (Sa) = pi(D**2)/4 = 4.5239 m**2 Wavelength at 6.1750 GHz (lambda) = 0.0485 m Transmit Power at Flange (P) = 20.0000 Watts Antenna Gain at Earth Site (GES) = 42.0000 dBi = 15848.9319 Power Ratio: AntiLog(GES/10) pi = 3.1415927 Antenna Aperture Efficiency (n) = 0.6000

1. FAR ZONE CALCULATIONS ======================== Distance to the Far Zone (Df) = (n)(D**2) = 71.2577 m --------- lambda Far Zone Power Density (Rf) = (GES)(P) = 4.9677 W/m**2 ------------ 4*pi*(Df**2) = 0.4968 mW/cm**2 2. NEAR ZONE CALCULATIONS ========================= Power Flux Density is considered to be at a maximum value throughout the entire length of this Zone. The Zone is contained within a cylindrical volume which has the same diameter as the antenna. Beyond the Near Zone, the Power Flux Density will decrease with distance from the Antenna. Distance to the Near Zone (Dn) = D**2 = 29.6907 m -------- 4*lambda Near Zone Power Density (Rn) = 16.0(n)P = 10.6103 W/m**2 -------- pi(D**2) = 1.0610 mW/cm**2 3. TRANSITION ZONE CALCULATIONS =============================== The Power Density begins to decrease with distance in the Transition Zone. While the Power Density decreases inversely with distance in the Transition Zone, the Power Density decreases inversely with the square of the distance in the Far Zone. Since the maximum Power Density in the Transition Zone will not exceed the Near Zone values, it is not calculated.

4. MAIN REFLECTOR ZONE ====================== Main Reflector Power Density = 2(P) = 8.8419 W/m**2 ---- Sa = 0.8842 mW/cm**2 5. ZONE BETWEEN THE MAIN REFLECTOR AND THE GROUND ================================================= Applying uniform illumination of the Main Reflector Surface: Main to Ground Power Density = P = 4.4210 W/m**2 ---- Sa = 0.4421 mW/cm**2

CALCULATED SAFETY MARGINS SUMMARY AND EVALUATION -------------------------------------------------------------------------- Controlled Safety Margin = 5.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 4.5032 Complies with ANSI 2. Near Zone 3.9390 Complies with ANSI 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface 4.1158 Complies with ANSI 5. Main Reflector to Ground 4.5579 Complies with ANSI -------------------------------------------------------------------------- Uncontrolled Safety Margin = 1.0 - Calculated Zone Value (mW/cm**2) -------------------------------------------------------------------------- Safety Zones Margins Conclusions (mW/cm**2) ---------------------------- ------------ ---------------------------- 1. Far Zone 0.5032 Complies with ANSI 2. Near Zone -0.0610 POTENTIALLY HAZARDOUS 3. Transition Zone Rf < Rt < Rn Complies with ANSI 4. Main Reflector Surface 0.1158 Complies with ANSI 5. Main Reflector to Ground 0.5579 Complies with ANSI 6. EVALUATION ============== A. Controlled Environment B. Uncontrolled Environment The NEAR ZONE does not comply with the ANSI standards! The system will be FENCED so that no one can enter the affected Zone while the system is in use. Additionally, the system will be shut down for servicing.


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Document Modified: 2019-05-14 22:18:14
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