Attachment Coordination report

This document pretains to SES-LIC-20190321-00434 for License on a Satellite Earth Station filing.

IBFS_SESLIC2019032100434_1637705

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Arctic Slope Telephone Assoc Coop., Inc. ANAKTUVUK, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 March 19, 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 03/19/2019 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 03/19/2019 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 03/19/2019 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 Alascom Inc Frequency Coordination and Interference Analysis Report 03/19/2019 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 03/19/2019 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 03/19/2019 Job Number: 190315COMSGE03 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code ARCTIC Licensee Name Arctic Slope Telephone Assoc Coop., Inc. Site Information ANAKTUVUK, AK Venue Name Latitude (NAD 83) 68° 8' 27.6" N Longitude (NAD 83) 151° 43' 58.6" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 661.0 m / 2168.6 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 101° W to 139° West Longitude Azimuth Range 127.2° to 166.3° Corresponding Elevation Angles 5.0° / 12.8° 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 568.8 km / 353.4 mi 226.9 km / 141.0 mi Precipitation Scatter Contour Radius 621.3 km / 386.0 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 03/19/2019 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 ANAKTUVUK, AK Licensee Name Arctic Slope Telephone Assoc Coop., Inc. Latitude (NAD 83) 68° 8' 27.6" N Longitude (NAD 83) 151° 43' 58.6" W Ground Elevation (AMSL) 661.0 m / 2168.6 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 10.69 126.98 -10.00 100.00 -10.00 100.00 5 9.66 122.07 -10.00 100.00 -10.00 100.00 10 7.89 117.15 -10.00 104.97 -10.00 100.00 15 5.52 112.19 -10.00 129.80 -10.00 100.00 20 2.81 107.18 -10.00 175.95 -10.00 100.00 25 0.40 102.15 -10.00 261.56 -10.00 110.92 30 0.25 97.17 -10.00 279.07 -10.00 122.66 35 0.00 92.18 -10.00 285.28 -10.00 126.71 40 0.00 87.20 -10.00 285.28 -10.00 126.71 45 0.36 82.22 -10.00 265.75 -10.00 113.78 50 0.60 77.23 -10.00 243.20 -10.00 100.00 55 1.05 72.24 -10.00 218.68 -10.00 100.00 60 1.25 67.24 -10.00 212.58 -10.00 100.00 65 1.29 62.25 -10.00 211.52 -10.00 100.00 70 1.40 57.26 -10.00 208.29 -10.00 100.00 75 1.84 52.26 -10.00 198.74 -10.00 100.00 80 1.79 47.27 -9.87 200.77 -9.87 100.00 85 2.18 42.27 -8.65 196.81 -8.65 100.00 90 2.28 37.28 -7.29 201.09 -7.29 100.00 95 3.35 32.23 -5.71 185.56 -5.71 100.00 100 5.86 27.21 -3.87 151.97 -3.87 100.00 105 7.67 22.35 -1.73 140.45 -1.73 100.00 110 8.51 17.54 0.90 144.92 0.90 100.00 115 10.41 13.34 3.87 143.31 3.87 100.00 120 11.77 9.89 7.12 151.42 7.12 100.00 125 10.51 5.97 12.61 568.81 12.61 226.92 130 10.18 4.21 16.40 511.46 16.40 202.00 135 10.35 3.06 19.86 432.67 19.86 168.04 140 8.50 0.18 42.00 495.00 46.20 185.19 145 6.95 2.61 21.57 363.33 21.57 124.01 150 4.71 5.82 12.88 306.83 12.88 111.37 155 4.39 6.99 10.89 279.21 10.89 104.69 160 3.25 8.83 8.35 272.13 8.35 100.00 165 2.57 10.09 6.91 279.88 6.91 100.00 170 2.22 11.21 5.76 280.93 5.76 100.00 175 6.14 10.93 6.03 206.60 6.03 100.00 180 8.71 14.27 3.14 155.35 3.14 100.00 185 7.77 19.33 -0.15 147.19 -0.15 100.00 Frequency Coordination and Interference Analysis Report 03/19/2019 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 ANAKTUVUK, AK Licensee Name Arctic Slope Telephone Assoc Coop., Inc. Latitude (NAD 83) 68° 8' 27.6" N Longitude (NAD 83) 151° 43' 58.6" W Ground Elevation (AMSL) 661.0 m / 2168.6 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 6.30 24.51 -2.73 152.18 -2.73 100.00 195 4.37 29.80 -4.85 169.34 -4.85 100.00 200 5.48 34.38 -6.41 143.88 -6.41 100.00 205 6.24 39.15 -7.82 131.21 -7.82 100.00 210 5.62 44.15 -9.12 132.30 -9.12 100.00 215 3.75 49.31 -10.00 153.04 -10.00 100.00 220 0.82 54.60 -10.00 230.28 -10.00 100.00 225 0.30 59.51 -10.00 272.83 -10.00 118.53 230 0.86 64.29 -10.00 227.86 -10.00 100.00 235 1.49 69.12 -10.00 206.03 -10.00 100.00 240 1.82 73.99 -10.00 199.47 -10.00 100.00 245 2.33 78.87 -10.00 186.91 -10.00 100.00 250 5.44 83.73 -10.00 130.57 -10.00 100.00 255 8.56 88.68 -10.00 100.00 -10.00 100.00 260 8.04 93.67 -10.00 103.41 -10.00 100.00 265 8.36 98.65 -10.00 100.59 -10.00 100.00 270 9.43 103.66 -10.00 100.00 -10.00 100.00 275 9.05 108.64 -10.00 100.00 -10.00 100.00 280 6.02 113.50 -10.00 124.95 -10.00 100.00 285 4.52 118.35 -10.00 140.11 -10.00 100.00 290 2.90 123.11 -10.00 173.88 -10.00 100.00 295 5.33 128.29 -10.00 131.62 -10.00 100.00 300 9.40 133.58 -10.00 100.00 -10.00 100.00 305 10.54 138.63 -10.00 100.00 -10.00 100.00 310 10.82 143.63 -10.00 100.00 -10.00 100.00 315 9.08 148.48 -10.00 100.00 -10.00 100.00 320 7.20 153.13 -10.00 112.17 -10.00 100.00 325 5.53 157.53 -10.00 129.70 -10.00 100.00 330 7.33 157.08 -10.00 110.82 -10.00 100.00 335 7.13 152.11 -10.00 112.95 -10.00 100.00 340 9.48 146.92 -10.00 100.00 -10.00 100.00 345 11.38 141.73 -10.00 100.00 -10.00 100.00 350 11.32 136.81 -10.00 100.00 -10.00 100.00 355 11.74 131.83 -10.00 100.00 -10.00 100.00 Frequency Coordination and Interference Analysis Report 03/19/2019 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 19, 2019 Frequency Coordination and Interference Analysis Report 03/19/2019 Page 10 of 10


Document Created: 2019-03-19 09:35:20
Document Modified: 2019-03-19 09:35:20
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