Attachment Exhibit B

This document pretains to SES-LIC-20130805-00692 for License on a Satellite Earth Station filing.

IBFS_SESLIC2013080500692_1006272

Exhibit B Frequency Coordination Per 47 C.F.R. Ch. 1 §25.130(b), attached is a “Frequency Coordination And Interference Analysis Report” performed pursuant to 47 C.F.R. Ch. 1 §25.203(c).

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for GCI Communications Corporation COEUR MINING, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 July 22, 2013

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 07/22/2013 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 07/22/2013 Page 3 of 10

2. SUMMARY OF RESULTS A number of great circle interference cases were identified during the interference study of the proposed earth station. Each of the cases, which exceeded the interference objective on a line-of-sight basis, was profiled and the propagation losses estimated using NBS TN101 (Revised) techniques. The losses were found to be sufficient to reduce the signal levels to acceptable magnitudes in every case. The following company reported potential great circle interference conflicts that did not meet the objectives on a line-of-sight basis. When over-the-horizon losses are considered on the interfering paths, sufficient blockage exists to negate harmful interference from occurring with the proposed transmit-receive earth station. Company Alaska Power & Telephone Company No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 07/22/2013 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 07/18/2013. Company Alascom Inc Alaska Power & Telephone Company NORTHWESTEL INC Frequency Coordination and Interference Analysis Report 07/22/2013 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 07/22/2013 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 07/22/2013 Job Number: 130718COMSTC06 Administrative Information Status ENGINEER PROPOSAL Call Sign COUER MI Licensee Code P3203 Licensee Name GCI Communications Corporation Site Information COEUR MINING, AK Venue Name Latitude (NAD 83) 58° 51' 58.7" N Longitude (NAD 83) 135° 6' 21.7" W Climate Zone A Rain Zone 3 Ground Elevation (AMSL) 224.94 m / 738.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 75° W to 194° West Longitude Azimuth Range 116.2° to 242.7° Corresponding Elevation Angles 6.3° / 6.9° Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Information Receive Transmit Manufacturer General Dynamics General Dynamics Model 2244 2244 Gain / Diameter 38.1 dBi / 2.4 m 42.2 dBi / 2.4 m 3-dB / 15-dB Beamwidth 1.50° / 3.00° 1.00° / 2.00° 45K0G7W - 36M0G7W 45K0D7W - 36M0D7W Max Available RF Power (dBW/4 kHz) -8.1 -23.52 (dBW/MHz) 15.9 -0.48 Maximum EIRP (dBW/4 kHz) 34.1 18.68 (dBW/MHz) 58.1 43.68 (dBW) 44.6 58.22 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) 45K0G7W - 36M0G7W / 3700.0 - 4200.0 45K0G7W - 36M0G7W / 5925.0 - 6425.0 45K0D7W - 36M0D7W / 3700.0 - 4200.0 45K0D7W - 36M0D7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 442.4 km / 274.8 mi 212.0 km / 131.7 mi Precipitation Scatter Contour Radius 418.7 km / 260.1 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 07/22/2013 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 COEUR MINING, AK Licensee Name GCI Communications Corporation Latitude (NAD 83) 58° 51' 58.7" N Longitude (NAD 83) 135° 6' 21.7" W Ground Elevation (AMSL) 224.94 m / 738.0 ft Antenna Centerline (AGL) 3.66 m / 12.0 ft 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 -8.1 (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 22.61 115.07 -10.00 100.00 -10.00 100.00 5 21.88 110.39 -10.00 100.00 -10.00 100.00 10 22.99 105.50 -10.00 100.00 -10.00 100.00 15 23.82 100.68 -10.00 100.00 -10.00 100.00 20 26.32 95.83 -10.00 100.00 -10.00 100.00 25 27.52 91.12 -10.00 100.00 -10.00 100.00 30 28.26 86.48 -10.00 100.00 -10.00 100.00 35 28.31 81.85 -10.00 100.00 -10.00 100.00 40 27.16 77.12 -10.00 100.00 -10.00 100.00 45 26.09 72.35 -10.00 100.00 -10.00 100.00 50 26.99 67.83 -10.00 100.00 -10.00 100.00 55 28.15 63.45 -10.00 100.00 -10.00 100.00 60 28.51 59.01 -10.00 100.00 -10.00 100.00 65 31.27 55.39 -10.00 100.00 -10.00 100.00 70 30.18 50.74 -10.00 100.00 -10.00 100.00 75 28.81 45.97 -9.56 100.00 -9.56 100.00 80 27.28 41.12 -8.35 100.00 -8.35 100.00 85 25.80 36.27 -6.99 100.00 -6.99 100.00 90 23.27 30.90 -5.25 100.00 -5.25 100.00 95 22.37 26.39 -3.54 100.00 -3.54 100.00 100 18.44 20.16 -0.61 100.00 -0.61 100.00 105 16.22 14.93 2.65 100.34 2.65 100.00 110 14.51 10.28 6.70 131.16 6.70 100.00 115 14.07 7.49 10.14 432.25 10.14 212.02 120 12.98 4.31 16.15 339.42 16.15 161.88 125 12.53 1.80 25.60 301.21 25.60 121.17 130 12.34 0.55 38.10 388.39 38.45 150.23 135 10.47 3.97 17.04 223.43 17.04 100.00 140 10.53 5.65 13.19 201.19 13.19 100.00 145 11.17 6.61 11.50 185.90 11.50 100.00 150 11.84 7.34 10.36 173.23 10.36 100.00 155 11.69 8.68 8.54 161.17 8.54 100.00 160 11.25 10.10 6.90 154.26 6.90 100.00 165 9.79 12.32 4.74 153.54 4.74 100.00 170 9.25 13.44 3.79 153.53 3.79 100.00 175 8.71 14.32 3.10 155.12 3.10 100.00 180 8.09 15.05 2.56 158.61 2.56 100.00 185 7.94 15.08 2.54 160.25 2.54 100.00 Frequency Coordination and Interference Analysis Report 07/22/2013 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 COEUR MINING, AK Licensee Name GCI Communications Corporation Latitude (NAD 83) 58° 51' 58.7" N Longitude (NAD 83) 135° 6' 21.7" W Ground Elevation (AMSL) 224.94 m / 738.0 ft Antenna Centerline (AGL) 3.66 m / 12.0 ft 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 -8.1 (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 8.21 14.47 2.99 159.89 2.99 100.00 195 9.91 12.21 4.84 152.92 4.84 100.00 200 11.15 10.19 6.80 154.44 6.80 100.00 205 11.78 8.59 8.65 161.11 8.65 100.00 210 12.69 6.51 11.65 174.03 11.65 100.00 215 12.95 4.92 14.71 191.03 14.71 100.00 220 13.34 3.00 20.07 218.79 20.07 100.00 225 13.47 1.17 30.27 297.48 30.27 102.61 230 12.54 0.32 38.10 386.40 42.20 173.68 235 12.58 1.84 25.36 296.93 25.36 119.78 240 10.59 2.16 23.64 368.58 23.64 159.77 245 6.38 2.37 22.65 442.36 22.65 202.36 250 4.70 7.63 9.94 250.29 9.94 100.00 255 2.36 13.10 4.07 263.85 4.07 113.72 260 0.22 18.51 0.32 355.70 0.32 187.09 265 0.00 23.30 -2.18 340.15 -2.18 180.04 270 0.00 28.10 -4.22 325.27 -4.22 172.14 275 0.00 32.96 -5.95 312.98 -5.95 163.79 280 0.00 37.85 -7.45 302.00 -7.45 158.17 285 0.00 42.77 -8.78 293.18 -8.78 153.44 290 0.00 47.69 -9.96 285.52 -9.96 149.38 295 0.00 52.63 -10.00 285.28 -10.00 149.26 300 0.00 57.58 -10.00 285.28 -10.00 149.26 305 0.00 62.53 -10.00 285.28 -10.00 149.26 310 1.22 67.43 -10.00 213.65 -10.00 100.00 315 1.69 72.39 -10.00 202.77 -10.00 100.00 320 2.99 77.35 -10.00 171.80 -10.00 100.00 325 4.99 82.32 -10.00 134.97 -10.00 100.00 330 6.38 87.32 -10.00 121.08 -10.00 100.00 335 5.60 92.32 -10.00 129.08 -10.00 100.00 340 7.94 97.32 -10.00 104.46 -10.00 100.00 345 12.74 102.25 -10.00 100.00 -10.00 100.00 350 16.26 107.08 -10.00 100.00 -10.00 100.00 355 19.92 111.71 -10.00 100.00 -10.00 100.00 Frequency Coordination and Interference Analysis Report 07/22/2013 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. Timothy O. Crutcher Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: July 22, 2013 Frequency Coordination and Interference Analysis Report 07/22/2013 Page 10 of 10


Document Created: 2013-07-25 15:10:53
Document Modified: 2013-07-25 15:10:53
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