Attachment Frequency Report

This document pretains to SES-MOD-20170418-00400 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2017041800400_1205527

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for EchoStar Corporation SUMMERSET, SD (E150098) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 February 09, 2017

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 02/09/2017 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 02/09/2017 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. Frequency Coordination and Interference Analysis Report 02/09/2017 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 01/25/2017. Company Campbell, County of Qwest Corporation Range Telephone Cooperative, Inc. Rapid City Medical Center, LLP Visionary Communications, Inc. West River Electric Association Inc Western Communications, Inc. Frequency Coordination and Interference Analysis Report 02/09/2017 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 02/09/2017 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 01/25/2017 Job Number: 170125COMSGE07 Administrative Information Status ENGINEER PROPOSAL Call Sign E150098 Licensee Code ZECHOS Licensee Name EchoStar Corporation Site Information SUMMERSET, SD Venue Name Latitude (NAD 83) 44° 11' 14.4" N Longitude (NAD 83) 103° 20' 9.6" W Climate Zone A Rain Zone 5 Ground Elevation (AMSL) 1109.98 m / 3641.7 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 33° W to 174° West Longitude Azimuth Range 104.0° to 256.3° Corresponding Elevation Angles 5.3° / 5.1° Antenna Centerline (AGL) 5.9 m / 19.4 ft Antenna Information Transmit - FCC32 Manufacturer General Dynamics General Dynamics Model 9.2 Meter 9.2 Meter Gain / Diameter 58.9 dBi / 9.2 m 61.9 dBi / 9.2 m 3-dB / 15-dB Beamwidth 0.19° / 0.43° 0.13° / 0.32° Max Available RF Power (dBW/4 kHz) -5.8 (dBW/MHz) 18.2 Maximum EIRP (dBW/4 kHz) 56.1 (dBW/MHz) 80.1 Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Frequency Information Receive 12.2 GHz Transmit 17.3 GHz Emission / Frequency Range (MHz) 300KGXD - 24M0G7W / 12200.0 - 12700.0 1M50F2D - 24M0G7W / 17300.0 - 17800.0 Max Great Circle Coordination Distance 578.0 km / 359.1 mi 339.2 km / 210.8 mi Precipitation Scatter Contour Radius 417.1 km / 259.1 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 02/09/2017 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 SUMMERSET, SD Licensee Name EchoStar Corporation Latitude (NAD 83) 44° 11' 14.4" N Longitude (NAD 83) 103° 20' 9.6" W Ground Elevation (AMSL) 1109.98 m / 3641.7 ft Antenna Centerline (AGL) 5.9 m / 19.4 ft Antenna Model General Dynamics Antenna Mode Receive 12.2 GHz Transmit 17.3 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -128.0 dBW/4 kHz .0025% Max Available RF Power -5.8 (dBW/4 kHz) Receive 12.2 GHz Transmit 17.3 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 2.00 103.73 -10.00 143.15 -10.00 100.00 5 2.53 98.98 -10.00 132.01 -10.00 100.00 10 2.77 93.99 -10.00 128.87 -10.00 100.00 15 2.67 88.99 -10.00 130.66 -10.00 100.00 20 3.20 83.99 -10.00 121.16 -10.00 100.00 25 3.53 78.99 -10.00 115.49 -10.00 100.00 30 3.47 74.00 -10.00 116.50 -10.00 100.00 35 3.79 69.00 -10.00 111.14 -10.00 100.00 40 4.09 64.00 -10.00 106.61 -10.00 100.00 45 4.30 58.99 -10.00 103.90 -10.00 100.00 50 4.36 53.99 -10.00 103.18 -10.00 100.00 55 4.20 49.00 -10.00 105.15 -10.00 100.00 60 4.22 44.00 -9.09 108.07 -9.09 100.00 65 4.23 39.00 -7.78 112.53 -7.78 100.00 70 4.31 34.00 -6.29 116.96 -6.29 100.00 75 4.30 29.00 -4.56 123.56 -4.56 100.00 80 4.84 23.99 -2.50 124.65 -2.50 100.00 85 5.16 18.99 0.04 130.94 0.04 100.00 90 3.11 14.16 3.23 185.72 3.23 100.00 95 2.02 9.57 7.48 227.25 7.48 118.68 100 2.82 4.70 15.20 255.15 15.20 130.28 105 1.58 3.85 17.35 577.98 17.35 339.23 110 0.00 7.98 9.44 364.27 9.44 219.96 115 0.00 11.39 5.59 305.85 5.59 193.06 120 0.00 14.71 2.81 292.24 2.81 182.50 125 0.00 17.94 0.66 280.30 0.66 174.30 130 0.00 21.05 -1.08 270.97 -1.08 167.70 135 0.00 24.03 -2.52 263.48 -2.52 160.74 140 0.00 26.83 -3.72 257.37 -3.72 156.31 145 0.32 29.17 -4.62 240.39 -4.62 141.82 150 0.83 31.10 -5.32 203.38 -5.32 111.35 155 1.26 32.78 -5.89 187.91 -5.89 100.00 160 1.38 34.42 -6.42 181.87 -6.42 100.00 165 1.55 35.67 -6.81 174.92 -6.81 100.00 170 2.00 36.25 -6.98 157.14 -6.98 100.00 175 2.68 36.19 -6.96 141.35 -6.96 100.00 180 3.33 35.74 -6.83 130.52 -6.83 100.00 185 4.14 34.73 -6.52 118.29 -6.52 100.00 Frequency Coordination and Interference Analysis Report 02/09/2017 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 BLACKHAWK, SD Licensee Name EchoStar Corporation Latitude (NAD 83) 44° 11' 14.4" N Longitude (NAD 83) 103° 20' 9.6" W Ground Elevation (AMSL) 1109.98 m / 3641.7 ft Antenna Centerline (AGL) 5.9 m / 19.4 ft Antenna Model General Dynamics Antenna Mode Receive 12.2 GHz Transmit 17.3 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -128.0 dBW/4 kHz .0025% Max Available RF Power -5.8 (dBW/4 kHz) Receive 12.2 GHz Transmit 17.3 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 3.64 34.64 -6.49 126.35 -6.49 100.00 195 4.47 32.87 -5.92 116.27 -5.92 100.00 200 5.11 30.94 -5.26 110.94 -5.26 100.00 205 4.03 30.28 -5.03 125.32 -5.03 100.00 210 3.90 28.42 -4.34 130.20 -4.34 100.00 215 2.98 26.92 -3.75 149.61 -3.75 100.00 220 3.44 24.01 -2.51 145.66 -2.51 100.00 225 3.53 21.21 -1.16 150.39 -1.16 100.00 230 3.57 18.27 0.45 157.87 0.45 100.00 235 3.65 15.15 2.49 169.42 2.49 100.00 240 3.64 11.98 5.04 183.42 5.04 100.00 245 3.63 8.70 8.51 201.08 8.51 100.00 250 3.64 5.35 13.79 285.53 13.79 146.09 255 3.65 1.89 25.06 547.59 25.06 313.79 260 3.86 3.94 17.12 243.35 17.12 120.66 265 4.01 8.81 8.38 193.14 8.38 100.00 270 3.41 13.84 3.47 180.18 3.47 100.00 275 3.04 18.85 0.12 171.17 0.12 100.00 280 2.77 23.85 -2.44 161.48 -2.44 100.00 285 2.44 28.86 -4.51 158.67 -4.51 100.00 290 2.49 33.83 -6.23 149.02 -6.23 100.00 295 2.00 38.85 -7.73 153.54 -7.73 100.00 300 2.11 43.83 -9.04 144.82 -9.04 100.00 305 1.55 48.84 -10.00 156.58 -10.00 100.00 310 1.21 53.84 -10.00 170.27 -10.00 100.00 315 0.25 58.87 -10.00 222.22 -10.00 131.54 320 0.00 63.86 -10.00 227.19 -10.00 135.85 325 0.00 68.83 -10.00 227.19 -10.00 135.85 330 0.00 73.81 -10.00 227.19 -10.00 135.85 335 1.15 78.77 -10.00 172.26 -10.00 100.00 340 1.09 83.76 -10.00 174.37 -10.00 100.00 345 1.50 88.75 -10.00 158.01 -10.00 100.00 350 1.54 93.74 -10.00 156.93 -10.00 100.00 355 1.64 98.73 -10.00 153.86 -10.00 100.00 Frequency Coordination and Interference Analysis Report 02/09/2017 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: February 09, 2017 Frequency Coordination and Interference Analysis Report 02/09/2017 Page 10 of 10


Document Created: 2017-02-09 14:59:45
Document Modified: 2017-02-09 14:59:45
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