Attachment Exhibit C

This document pretains to SES-LIC-20100318-00331 for License on a Satellite Earth Station filing.

IBFS_SESLIC2010031800331_806297

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Discovery Productions Group, Inc. STERLING, VA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 March 4, 2010

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA.................................................................................................. 7 5. CERTIFICATION......................................................................................................................................... 11 Frequency Coordination and Interference Analysis Report 03/04/2010 Page 2 of 11

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 03/04/2010 Page 3 of 11

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 companies 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 Allegheny Power Service Corporation Cellco Partnership-Newark-Dallas Verizon Local Communications Network, Inc. Loudoun County MCI Communication Services, Inc New Cingular Wireless PCS LLC – DC Virginia Electric & Power Company Washington D.C. SMSA L.P. WASHINGTON SUBURBAN SANITARY COMMISSION No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 03/04/2010 Page 4 of 11

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 01/06/2010. Company ALLTEL Communications of VA No. 1, Inc. ALLTEL Communications of Virginia, Inc. AT&T COMMUNICATIONS OF MARYLAND INC AT&T COMMUNICATIONS OF VIRGINIA INC AT&T CORP Allegheny Power Service Corporation Atlantic Broadband (Delmar), LLC Atlantic Broadband (Penn), LLC BAY BROADBAND COMMUNICATIONS LLC Baltimore County of Maryland Baltimore Gas and Electric Company COLLEGE OF SOUTHERN MARYLAND Cellco Partnership- PA Region Cellco Partnership-Newark-Dallas Verizon Cellco Partnership-Washington/Baltimore Charles, County of Conterra Ultra Broadband, LLC County of Frederick County of Stafford Enoch Pratt Free Library Frederick County HANOVER COUNTY Hardy Cellular Telephone Company Harrisonburg-Rockingham ECC International Communications Group, Inc. LB Tower Company LLC Last Mile Inc. Local Communications Network, Inc. Loudoun, County of MARYLAND PUBLIC BROADCASTING COMMISSION MCI Communication Services, Inc. METROPOLITAN AREA NETWORKS, INC. Maryland State Highway Administration Maryland, State of - Budget & Management NTELOS Telephone, Inc. National Radio Astronomy Observatory New Cingular Wireless PCS - VA/DC/MD New Cingular Wireless PCS LLC - DC New Cingular Wireless PCS, LLC - PA Northern Virginia Electric Cooperative Frequency Coordination and Interference Analysis Report 03/04/2010 Page 5 of 11

PENNSYLVANIA TURNPIKE COMMISSION PRINCE WILLIAM COUNTY Pennsylvania Commonwealth State Police Prince George's County RAPPAHANNOCK ELECTRIC COOPERATIVE South & Central Wireless, LLC - SOVA Southern Maryland Electric Cooperative I State of Maryland, MIEMSS State of WV DHHR/BPH STECS Texas Eastern Communications, Inc. USCOC of Cumberland, Inc. Virginia Broadband, LLC Virginia Cellular LLC Virginia Department of State Police Virginia Electric & Power Company Virginia PCS Alliance, L.C. WASHINGTON SUBURBAN SANITARY COMMISSION Washington D.C. SMSA L.P. Wireless Strategies, Inc. Frequency Coordination and Interference Analysis Report 03/04/2010 Page 6 of 11

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 03/04/2010 Page 7 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 02/24/2010 Job Number: 100106COMSGE02 Administrative Information Status PROPOSED Call Sign STERLING Licensee Code DISCOM Licensee Name Discovery Productions Group, Inc. Site Information STERLING, VA Venue Name Latitude (NAD 83) 38° 59' 14.8" N Longitude (NAD 83) 77° 25' 33.7" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 92.05 m / 302.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 43° W to 143° West Longitude Azimuth Range 132.6° to 254.1° Corresponding Elevation Angles 32.6° / 10.2° Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer ViaSat ViaSat Model 8009 8009 Gain / Diameter 50.3 dBi / 9.0 m 53.8 dBi / 9.0 m 3-dB / 15-dB Beamwidth 0.58° / 1.20° 0.38° / 0.80° Max Available RF Power (dBW/4 kHz) -15.0 (dBW/MHz) 9.0 Maximum EIRP (dBW/4 kHz) 38.8 (dBW/MHz) 62.8 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) 30M0G7D / 3700.0 - 4200.0 30M0G7D / 5925.0 - 6425.0 Max Great Circle Coordination Distance 451.8 km / 280.7 mi 196.4 km / 122.0 mi Precipitation Scatter Contour Radius 539.1 km / 335.0 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 03/04/2010 Page 8 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values STERLING, VA Licensee Name Discovery Productions Group, Inc. Latitude (NAD 83) 38° 59' 14.8" N Longitude (NAD 83) 77° 25' 33.7" W Ground Elevation (AMSL) 92.05 m / 302.0 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model ViaSat 8009, 9 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 -15.0 (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 0.26 105.70 -10.00 278.23 -10.00 125.55 5 0.24 110.62 -10.00 279.69 -10.00 126.51 10 0.00 115.51 -10.00 285.28 -10.00 130.16 15 0.00 112.95 -10.00 285.28 -10.00 130.16 20 0.00 108.86 -10.00 285.28 -10.00 130.16 25 0.34 104.78 -10.00 267.90 -10.00 118.65 30 0.40 100.60 -10.00 260.67 -10.00 113.71 35 0.38 96.39 -10.00 263.65 -10.00 115.76 40 0.38 92.16 -10.00 262.99 -10.00 115.30 45 0.33 87.93 -10.00 269.14 -10.00 119.48 50 0.33 83.71 -10.00 269.15 -10.00 119.49 55 0.47 79.48 -10.00 252.89 -10.00 108.28 60 0.57 75.27 -10.00 245.48 -10.00 103.08 65 0.63 71.09 -10.00 241.79 -10.00 100.39 70 0.69 66.95 -10.00 237.93 -10.00 100.00 75 0.71 62.89 -10.00 236.76 -10.00 100.00 80 0.72 58.90 -10.00 235.79 -10.00 100.00 85 0.70 55.02 -10.00 237.51 -10.00 100.00 90 0.73 51.25 -10.00 235.58 -10.00 100.00 95 0.76 47.64 -9.95 234.19 -9.95 100.00 100 0.76 44.24 -9.15 238.61 -9.15 100.00 105 0.68 41.16 -8.36 247.64 -8.36 102.06 110 0.82 38.24 -7.56 243.80 -7.56 100.00 115 0.80 35.83 -6.86 249.09 -6.86 100.62 120 0.78 33.92 -6.26 254.37 -6.26 103.28 125 0.66 32.69 -5.86 264.62 -5.86 109.74 130 0.69 31.95 -5.61 263.86 -5.61 108.79 135 0.65 31.99 -5.62 266.71 -5.62 110.77 140 0.54 32.78 -5.89 272.51 -5.89 115.18 145 0.53 34.12 -6.32 270.37 -6.32 114.47 150 0.52 36.03 -6.92 267.48 -6.92 113.50 155 0.57 38.29 -7.58 259.62 -7.58 109.17 160 0.59 40.34 -8.14 254.71 -8.14 106.66 165 0.57 42.04 -8.59 253.85 -8.59 106.77 170 0.57 43.28 -8.91 251.97 -8.91 105.94 175 0.54 44.06 -9.10 252.54 -9.10 106.65 180 0.00 44.86 -9.30 289.79 -9.30 132.05 185 0.00 44.60 -9.23 290.21 -9.23 132.22 Frequency Coordination and Interference Analysis Report 03/04/2010 Page 9 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values STERLING, VA Licensee Name Discovery Productions Group, Inc. Latitude (NAD 83) 38° 59' 14.8" N Longitude (NAD 83) 77° 25' 33.7" W Ground Elevation (AMSL) 92.05 m / 302.0 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model ViaSat 8009, 9 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 -15.0 (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 43.82 -9.04 291.44 -9.04 132.73 195 0.00 42.56 -8.73 293.51 -8.73 133.58 200 0.00 40.86 -8.28 296.44 -8.28 133.53 205 0.00 38.77 -7.71 300.25 -7.71 135.10 210 0.00 36.34 -7.01 305.01 -7.01 137.09 215 0.00 33.62 -6.17 310.84 -6.17 139.56 220 0.00 30.67 -5.17 318.49 -5.17 142.60 225 0.00 27.51 -3.99 326.93 -3.99 146.33 230 0.00 24.19 -2.59 337.12 -2.59 150.97 235 0.00 20.74 -0.92 349.62 -0.92 156.84 240 0.00 17.17 1.13 365.34 1.13 164.48 245 0.00 13.60 3.66 385.41 3.66 175.96 250 0.00 10.96 6.01 404.09 6.01 185.02 255 0.00 10.23 6.75 451.85 6.75 196.42 260 0.00 11.78 5.22 397.49 5.22 181.98 265 0.00 14.91 2.66 377.37 2.66 172.06 270 0.00 18.85 0.11 357.49 0.11 160.63 275 0.00 23.19 -2.13 340.50 -2.13 152.54 280 0.00 27.75 -4.08 326.26 -4.08 146.03 285 0.00 32.42 -5.77 314.23 -5.77 140.75 290 0.00 37.18 -7.26 303.33 -7.26 136.39 295 0.00 41.98 -8.58 294.50 -8.58 133.99 300 0.00 46.82 -9.76 286.81 -9.76 130.81 305 0.00 51.68 -10.00 285.28 -10.00 130.16 310 0.00 56.56 -10.00 285.28 -10.00 130.16 315 0.00 61.45 -10.00 285.28 -10.00 130.16 320 0.00 66.35 -10.00 285.28 -10.00 130.16 325 0.00 71.26 -10.00 285.28 -10.00 130.16 330 0.00 76.18 -10.00 285.28 -10.00 130.16 335 0.00 81.09 -10.00 285.28 -10.00 130.16 340 0.00 86.01 -10.00 285.28 -10.00 130.16 345 0.21 90.93 -10.00 284.52 -10.00 129.67 350 0.00 95.85 -10.00 285.28 -10.00 130.16 355 0.00 100.77 -10.00 285.28 -10.00 130.16 Frequency Coordination and Interference Analysis Report 03/04/2010 Page 10 of 11

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 4, 2010 Frequency Coordination and Interference Analysis Report 03/04/2010 Page 11 of 11


Document Created: 2010-03-18 11:24:27
Document Modified: 2010-03-18 11:24:27
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