Attachment Coordination report

This document pretains to SES-LIC-INTR2019-00817 for License on a Satellite Earth Station filing.

IBFS_SESLICINTR201900817_1637841

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Arctic Slope Telephone Assoc Coop., Inc. ATQASUK, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 March 18, 2019

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA .................................................................................................. 6 5. CERTIFICATION ......................................................................................................................................... 10 Frequency Coordination and Interference Analysis Report 03/18/2019 Page 2 of 10

1. CONCLUSIONS An interference study considering all existing, proposed and prior coordinated microwave facilities within the coordination contours of the proposed earth station demonstrates that this site will operate satisfactorily with the common carrier microwave environment. Further, there will be no restrictions of its operation due to interference considerations. Frequency Coordination and Interference Analysis Report 03/18/2019 Page 3 of 10

2. SUMMARY OF RESULTS No great circle interference cases were identified during the interference study of the proposed earth station. Frequency Coordination and Interference Analysis Report 03/18/2019 Page 4 of 10

3. SUPPLEMENTAL SHOWING Pursuant to Part 25.203(c) of the FCC Rules and Regulations, the satellite earth station proposed in this application was coordinated by Comsearch using computer techniques and in accordance with Part 25 of the FCC Rules and Regulations. Coordination data for this earth station was sent to the below listed carriers with a letter dated 03/15/2019. Company Comsearch Frequency Coordination and Interference Analysis Report 03/18/2019 Page 5 of 10

4. EARTH STATION COORDINATION DATA This section presents the data pertinent to frequency coordination of the proposed earth station that was circulated to all carriers within its coordination contours. Frequency Coordination and Interference Analysis Report 03/18/2019 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 03/18/2019 Job Number: <PCNJobCode> Administrative Information Status ENGINEER PROPOSAL Call Sign <PCNCallSign> Licensee Code ARCTIC Licensee Name Arctic Slope Telephone Assoc Coop., Inc. Site Information ATQASUK, AK Venue Name Latitude (NAD 83) 70° 28' 47.4" N Longitude (NAD 83) 157° 24' 57.7" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 25.0 m / 82.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 113° W to 139° West Longitude Azimuth Range 133.9° to 160.5° Corresponding Elevation Angles 5.1° / 9.9° Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Viking Viking Model 3.8 meter 3.8 meter Gain / Diameter 42.0 dBi / 3.8 m 46.2 dBi / 3.8 m 3-dB / 15-dB Beamwidth 1.40° / 3.20° 0.90° / 2.00° Max Available RF Power (dBW/4 kHz) -16.3 (dBW/MHz) 7.7 Maximum EIRP (dBW/4 kHz) 29.9 (dBW/MHz) 53.9 Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Frequency Information Receive 4.0 GHz Transmit 6.1 GHz Emission / Frequency Range (MHz) 3M40G7W / 3700.0 - 4200.0 3M40G7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 555.7 km / 345.3 mi 220.9 km / 137.2 mi Precipitation Scatter Contour Radius 776.2 km / 482.3 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 03/18/2019 Page 7 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values ATQASUK, AK Licensee Name Arctic Slope Telephone Assoc Coop., Inc. Latitude (NAD 83) 70° 28' 47.4" N Longitude (NAD 83) 157° 24' 57.7" W Ground Elevation (AMSL) 25.0 m / 82.0 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Viking 3.8 meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power -16.3 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 0.00 133.67 -10.00 285.28 -10.00 126.71 5 0.00 128.71 -10.00 285.28 -10.00 126.71 10 0.00 123.74 -10.00 285.28 -10.00 126.71 15 0.00 118.76 -10.00 285.28 -10.00 126.71 20 0.00 113.79 -10.00 285.28 -10.00 126.71 25 0.00 108.81 -10.00 285.28 -10.00 126.71 30 0.00 103.83 -10.00 285.28 -10.00 126.71 35 0.00 98.86 -10.00 285.28 -10.00 126.71 40 0.00 93.88 -10.00 285.28 -10.00 126.71 45 0.00 88.90 -10.00 285.28 -10.00 126.71 50 0.00 83.92 -10.00 285.28 -10.00 126.71 55 0.00 78.94 -10.00 285.28 -10.00 126.71 60 0.00 73.96 -10.00 285.28 -10.00 126.71 65 0.00 68.98 -10.00 285.28 -10.00 126.71 70 0.00 64.00 -10.00 285.28 -10.00 126.71 75 0.00 59.03 -10.00 285.28 -10.00 126.71 80 0.00 54.06 -10.00 285.28 -10.00 126.71 85 0.00 49.09 -10.00 285.28 -10.00 126.71 90 0.00 44.13 -9.12 290.95 -9.12 129.05 95 0.00 39.18 -7.83 299.49 -7.83 132.51 100 0.00 34.23 -6.36 309.48 -6.36 135.25 105 0.00 29.31 -4.67 322.00 -4.67 140.14 110 0.00 24.41 -2.69 336.41 -2.69 146.33 115 0.00 19.55 -0.28 354.46 -0.28 154.48 120 0.00 14.80 2.75 378.06 2.75 165.71 125 0.00 10.26 6.72 410.12 6.72 182.75 130 0.00 6.45 11.77 455.23 11.77 202.11 135 0.00 5.26 13.97 555.75 13.97 220.88 140 0.00 6.41 11.83 518.91 11.83 206.25 145 0.00 7.44 10.21 486.93 10.21 196.15 150 0.00 8.36 8.95 462.51 8.95 191.33 155 0.00 9.14 7.97 444.25 7.97 187.58 160 0.00 9.80 7.22 431.86 7.22 184.69 165 0.00 10.86 6.10 404.89 6.10 180.37 170 0.00 13.67 3.61 384.96 3.61 170.69 175 0.00 17.47 0.94 363.88 0.94 158.89 180 0.00 21.75 -1.44 345.72 -1.44 150.48 185 0.00 26.27 -3.49 330.56 -3.49 143.78 Frequency Coordination and Interference Analysis Report 03/18/2019 Page 8 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values ATQASUK, AK Licensee Name Arctic Slope Telephone Assoc Coop., Inc. Latitude (NAD 83) 70° 28' 47.4" N Longitude (NAD 83) 157° 24' 57.7" W Ground Elevation (AMSL) 25.0 m / 82.0 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Viking 3.8 meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power -16.3 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.00 30.94 -5.26 317.82 -5.26 138.40 195 0.00 35.68 -6.81 306.37 -6.81 134.00 200 0.00 40.48 -8.18 297.11 -8.18 131.55 205 0.00 45.32 -9.41 289.08 -9.41 128.28 210 0.00 50.18 -10.00 285.28 -10.00 126.71 215 0.00 55.06 -10.00 285.28 -10.00 126.71 220 0.00 59.96 -10.00 285.28 -10.00 126.71 225 0.00 64.86 -10.00 285.28 -10.00 126.71 230 0.00 69.77 -10.00 285.28 -10.00 126.71 235 0.00 74.69 -10.00 285.28 -10.00 126.71 240 0.00 79.61 -10.00 285.28 -10.00 126.71 245 0.00 84.54 -10.00 285.28 -10.00 126.71 250 0.00 89.46 -10.00 285.28 -10.00 126.71 255 0.00 94.39 -10.00 285.28 -10.00 126.71 260 0.00 99.31 -10.00 285.28 -10.00 126.71 265 0.00 104.23 -10.00 285.28 -10.00 126.71 270 0.00 109.15 -10.00 285.28 -10.00 126.71 275 0.00 114.07 -10.00 285.28 -10.00 126.71 280 0.00 118.97 -10.00 285.28 -10.00 126.71 285 0.00 123.87 -10.00 285.28 -10.00 126.71 290 0.00 128.75 -10.00 285.28 -10.00 126.71 295 0.00 133.62 -10.00 285.28 -10.00 126.71 300 0.00 138.46 -10.00 285.28 -10.00 126.71 305 0.00 143.27 -10.00 285.28 -10.00 126.71 310 0.00 148.03 -10.00 285.28 -10.00 126.71 315 0.00 152.72 -10.00 285.28 -10.00 126.71 320 0.00 157.28 -10.00 285.28 -10.00 126.71 325 0.00 161.63 -10.00 285.28 -10.00 126.71 330 0.00 163.11 -10.00 285.28 -10.00 126.71 335 0.00 158.30 -10.00 285.28 -10.00 126.71 340 0.00 153.42 -10.00 285.28 -10.00 126.71 345 0.00 148.51 -10.00 285.28 -10.00 126.71 350 0.00 143.58 -10.00 285.28 -10.00 126.71 355 0.00 138.63 -10.00 285.28 -10.00 126.71 Frequency Coordination and Interference Analysis Report 03/18/2019 Page 9 of 10

5. CERTIFICATION I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION, THAT I AM FAMILIAR WITH PARTS 101 AND 25 OF THE FCC RULES AND REGULATIONS, THAT I HAVE EITHER PREPARED OR REVIEWED THE FREQUENCY COORDINATION DATA SUBMITTED WITH THIS APPLICATION, 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: March 18, 2019 Frequency Coordination and Interference Analysis Report 03/18/2019 Page 10 of 10


Document Created: 2019-03-20 09:25:51
Document Modified: 2019-03-20 09:25:51
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