Attachment Question E18

This document pretains to SES-LIC-20170414-00404 for License on a Satellite Earth Station filing.

IBFS_SESLIC2017041400404_1205499

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Echostar Satellite Operating Corporation MT JACKSON, VA Ku-band DBS 13.2 Meter Satellite Earth Station(s) Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 July 21, 2005

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 07/21/2005 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 07/21/2005 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 07/21/2005 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 04/04/2005. Company Charlottesville Cellular Partnership EASTERBROOKE CELLULAR CORPORATION NATIONAL RADIO ASTRONOMY OBSERVATORY New Cingular Wireless PCS LLC - N CAL New Cingular Wireless PCS LLC -NE Reg PRINCE WILLIAM COUNTY Virginia Cellular Inc./Cellular One Frequency Coordination and Interference Analysis Report 07/21/2005 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 07/21/2005 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 07/21/2005 Job Number: 050404COMSGE04 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code ZECHOS Licensee Name Echostar Satellite Operating Corporation Site Information MT JACKSON, VA Venue Name Latitude (NAD 83) 38° 43' 22.4" N Longitude (NAD 83) 78° 39' 58.5" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 282.24 m / 926.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 34° W to 151° West Longitude Azimuth Range 122.3° to 258.7° Corresponding Elevation Angles 25.9° / 5.0° Antenna Centerline (AGL) 7.92 m / 26.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer TIW TIW Model 13.2 Meter 13.2 Meter Gain / Diameter 62.0 dBi / 13.2 m 65.0 dBi / 13.2 m 3-dB / 15-dB Beamwidth 0.05° / 0.15° 0.05° / 0.10° Max Available RF Power (dBW/4 kHz) -1.6 (dBW/MHz) 22.4 Maximum EIRP (dBW/4 kHz) 63.4 (dBW/MHz) 87.4 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) 300KG2D - 24M0M1F / 12200.0 - 12700.0 1M50G2D - 24M0M1F / 17300.0 - 17800.0 Max Great Circle Coordination Distance 694.3 km / 431.4 mi 462.3 km / 287.2 mi Precipitation Scatter Contour Radius 604.0 km / 375.3 mi 142.5 km / 88.6 mi Frequency Coordination and Interference Analysis Report 07/21/2005 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 MT JACKSON, VA Licensee Name Echostar Satellite Operating Corporation Latitude (NAD 83) 38° 43' 22.4" N Longitude (NAD 83) 78° 39' 58.5" W Ground Elevation (AMSL) 282.24 m / 926.0 ft Antenna Centerline (AGL) 7.92 m / 26.0 ft Antenna Model TIW 13.2 Meter 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 0.0025% Max Available RF Power -1.6 (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 0.90 101.24 -10.00 182.32 -10.00 106.87 5 0.73 106.22 -10.00 191.52 -10.00 114.54 10 0.80 110.13 -10.00 187.59 -10.00 111.20 15 0.77 105.65 -10.00 189.52 -10.00 112.83 20 0.43 101.12 -10.00 205.73 -10.00 129.62 25 0.44 96.62 -10.00 205.02 -10.00 128.97 30 0.22 92.10 -10.00 225.40 -10.00 147.21 35 0.00 87.60 -10.00 227.19 -10.00 149.00 40 0.00 83.10 -10.00 227.19 -10.00 149.00 45 0.00 78.62 -10.00 227.19 -10.00 149.00 50 0.00 74.15 -10.00 227.19 -10.00 149.00 55 0.00 69.71 -10.00 227.19 -10.00 149.00 60 0.37 65.22 -10.00 211.14 -10.00 133.37 65 1.18 60.63 -10.00 171.25 -10.00 100.00 70 1.69 56.12 -10.00 152.10 -10.00 100.00 75 3.33 51.25 -10.00 118.87 -10.00 100.00 80 3.79 46.77 -9.75 111.98 -9.75 100.00 85 4.22 42.35 -8.67 109.47 -8.67 100.00 90 4.18 38.27 -7.57 113.97 -7.57 100.00 95 3.04 35.04 -6.62 135.40 -6.62 100.00 100 2.29 32.04 -5.64 156.57 -5.64 100.00 105 3.09 28.35 -4.31 144.62 -4.31 100.00 110 3.23 25.64 -3.22 146.76 -3.22 100.00 115 3.29 23.69 -2.37 149.67 -2.37 100.00 120 3.43 22.57 -1.84 149.28 -1.84 100.00 125 3.44 22.59 -1.85 148.88 -1.85 100.00 130 3.27 23.81 -2.42 149.85 -2.42 100.00 135 2.54 26.39 -3.54 161.42 -3.54 100.00 140 1.70 29.63 -4.79 180.16 -4.79 100.25 145 1.09 33.00 -5.96 192.71 -5.96 111.89 150 0.84 35.89 -6.88 198.78 -6.88 118.18 155 0.50 38.60 -7.66 209.61 -7.66 129.89 160 0.24 40.91 -8.30 230.31 -8.30 150.40 165 0.35 42.52 -8.72 218.78 -8.72 139.46 170 0.55 43.59 -8.98 202.15 -8.98 125.42 175 0.82 44.08 -9.11 190.41 -9.11 112.81 180 0.98 44.18 -9.13 182.45 -9.13 106.22 185 1.11 43.80 -9.04 178.25 -9.04 102.78 Frequency Coordination and Interference Analysis Report 07/21/2005 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 MT JACKSON, VA Licensee Name Echostar Satellite Operating Corporation Latitude (NAD 83) 38° 43' 22.4" N Longitude (NAD 83) 78° 39' 58.5" W Ground Elevation (AMSL) 282.24 m / 926.0 ft Antenna Centerline (AGL) 7.92 m / 26.0 ft Antenna Model TIW 13.2 Meter 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 0.0025% Max Available RF Power -1.6 (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 1.62 42.55 -8.72 160.53 -8.72 100.00 195 2.22 40.78 -8.26 145.71 -8.26 100.00 200 1.94 39.41 -7.89 154.61 -7.89 100.00 205 1.57 37.70 -7.41 171.28 -7.41 100.00 210 1.16 35.64 -6.80 186.78 -6.80 107.63 215 0.99 33.08 -5.99 195.78 -5.99 114.63 220 0.90 30.20 -5.00 204.09 -5.00 121.33 225 1.62 26.52 -3.59 188.35 -3.59 105.75 230 2.16 22.82 -1.96 181.52 -1.96 100.00 235 2.54 19.13 -0.04 182.15 -0.04 100.00 240 2.59 15.54 2.21 191.99 2.21 104.20 245 2.28 12.11 4.92 208.52 4.92 119.55 250 1.70 8.77 8.42 241.61 8.42 144.00 255 1.35 5.24 14.02 389.98 14.02 246.61 260 1.17 4.06 16.79 694.28 16.79 462.33 265 1.44 7.22 10.53 263.12 10.53 160.83 270 2.65 11.51 5.47 203.34 5.47 114.55 275 3.49 16.34 1.67 168.80 1.67 100.00 280 2.67 21.39 -1.26 172.83 -1.26 100.00 285 2.88 26.35 -3.52 153.20 -3.52 100.00 290 2.94 31.33 -5.40 142.87 -5.40 100.00 295 2.11 36.37 -7.02 154.39 -7.02 100.00 300 1.90 41.37 -8.42 153.23 -8.42 100.00 305 1.62 46.37 -9.66 156.10 -9.66 100.00 310 1.29 51.37 -10.00 167.52 -10.00 100.00 315 1.33 56.35 -10.00 166.34 -10.00 100.00 320 1.32 61.34 -10.00 166.56 -10.00 100.00 325 1.28 66.32 -10.00 167.92 -10.00 100.00 330 1.49 71.31 -10.00 158.35 -10.00 100.00 335 1.55 76.30 -10.00 156.66 -10.00 100.00 340 1.78 81.28 -10.00 149.61 -10.00 100.00 345 1.38 86.28 -10.00 162.19 -10.00 100.00 350 0.97 91.27 -10.00 178.61 -10.00 103.91 355 1.02 96.25 -10.00 176.47 -10.00 102.24 Frequency Coordination and Interference Analysis Report 07/21/2005 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: July 21, 2005 Frequency Coordination and Interference Analysis Report 07/21/2005 Page 10 of 10


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