Attachment Exhibit A

This document pretains to SES-MOD-20100628-00838 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010062800838_825651

EXHIBIT A FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for PanAmSat Licensee Corp. Castle Rock, Colorado (Call Sign: E030232) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 June 11, 2010

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 06/11/2010 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 06/11/2010 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 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 transmit-receive earth station. Company None No carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 06/11/2010 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 an Information-Only letter dated June 11, 2010. Company AT&T COMMUNICATIONS OF MOUNTAIN STATES Abraham Divestiture Company LLC Adcom 911 BNSF Railway Company Black Hills Corporation Boulder, County of CBS Communications Services CBS Television Stations COLORADO INTERSTATE GAS COMPANY Cellular Inc. Network Corporation City of Colorado Springs Colorado Springs Utilities ENTRAVISION HOLDINGS, LLC FONES WEST DIGITAL SYSTEMS INC. Gray Television Licensee, Inc. (KKTV) Great Western Communications, LLC Intermountain Rural Electric Association International Communications Group, Inc. LB Tower Company LLC METROPOLITAN AREA NETWORKS, INC. Multimedia Holdings Corporation N.E. Colorado Wireless Technologies, Inc New Cingular Wireless PCS LLC -Colorado Pueblo, County of QWEST CORPORATION Smoky Hill Cellular of Colorado LP Sprint Communications Co., LP Sprint Spectrum LP DBA Sprint PCS State of Colorado Stelera Wireless, LLC Tri State Generation & Transmission UNITED POWER Verizon Wireless - Mountain Region WWC Holding Co., Inc Frequency Coordination and Interference Analysis Report 06/11/2010 Page 5 of 10

4. EARTH STATION COORDINATION DATA This section presents the data pertinent to frequency coordination of the earth station that was circulated to all carriers within its coordination contours. Frequency Coordination and Interference Analysis Report 06/11/2010 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 06/11/2010 Job Number: 100611COMSJC01 Administrative Information Status ENGINEER PROPOSAL Call Sign E030232 Licensee Code PANAS Licensee Name PanAmSat Licensee Corp Site Information CASTLE ROCK, COLORADO Venue Name Latitude (NAD 83) 39° 16' 38.0" N Longitude (NAD 83) 104° 48' 36.0" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 2096.0 m / 6876.6 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 43° W to 139° West Longitude Azimuth Range 108.7° to 227.0° Corresponding Elevation Angles 13.0° / 32.5° Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Information Receive Transmit Manufacturer Vertex Vertex Model 4.6 KPC 4.6 KPC Gain / Diameter 43.8 dBi / 4.6 m 47.0 dBi / 4.6 m 3-dB / 15-dB Beamwidth 1.20° / 2.40° 0.80° / 1.40° Max Available RF Power (dBW/4 kHz) -6.5 (dBW/MHz) 17.5 Maximum EIRP (dBW/4 kHz) 40.5 (dBW/MHz) 64.5 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) 9M00G7W / 3700.0 - 4200.0 9M00G7W / 5925.0 - 6425.0 18M0G7W / 3700.0 - 4200.0 18M0G7W / 5925.0 - 6425.0 36M0G7W / 3700.0 - 4200.0 36M0G7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 388.5 km / 241.4 mi 208.8 km / 129.7 mi Precipitation Scatter Contour Radius 526.5 km / 327.1 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 06/11/2010 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 CASTLE ROCK, CO Licensee Name PanAmSat Licensee Corp Latitude (NAD 83) 39° 16' 38.0" N Longitude (NAD 83) 104° 48' 36.0" W Ground Elevation (AMSL) 2096.0 m / 6876.6 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model Vertex 4.6 KPC 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 -6.5 (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 7.25 108.65 -10.00 111.64 -10.00 100.00 5 7.03 103.67 -10.00 113.98 -10.00 100.00 10 6.35 98.69 -10.00 121.36 -10.00 100.00 15 5.76 93.72 -10.00 127.48 -10.00 100.00 20 4.96 88.76 -10.00 134.10 -10.00 100.00 25 4.97 83.81 -10.00 134.04 -10.00 100.00 30 4.27 78.88 -10.00 143.76 -10.00 100.00 35 4.14 73.94 -10.00 145.68 -10.00 100.00 40 3.90 69.02 -10.00 149.93 -10.00 100.00 45 3.84 64.10 -10.00 151.08 -10.00 100.00 50 3.72 59.20 -10.00 153.59 -10.00 100.00 55 3.41 54.33 -10.00 160.33 -10.00 100.00 60 3.04 49.49 -10.00 170.54 -10.00 100.00 65 2.02 44.83 -9.29 197.40 -9.29 100.00 70 1.10 40.25 -8.12 227.00 -8.12 109.44 75 0.77 35.64 -6.80 251.57 -6.80 126.12 80 0.00 31.31 -5.39 316.91 -5.39 173.80 85 0.00 26.88 -3.73 328.77 -3.73 180.22 90 0.00 22.66 -1.88 342.37 -1.88 187.37 95 0.00 18.82 0.14 357.66 0.14 195.12 100 0.00 15.60 2.17 373.48 2.17 202.88 105 0.00 13.50 3.75 386.07 3.75 207.28 110 0.00 13.03 4.12 388.50 4.12 208.76 115 0.21 14.20 3.20 380.83 3.20 204.57 120 0.31 16.89 1.31 352.82 1.31 189.14 125 0.00 20.58 -0.84 350.23 -0.84 191.39 130 0.45 23.70 -2.37 305.34 -2.37 157.26 135 0.37 27.06 -3.81 305.67 -3.81 160.32 140 0.38 30.17 -4.99 295.42 -4.99 154.27 145 0.43 33.06 -5.98 282.85 -5.98 146.18 150 0.69 35.53 -6.77 256.73 -6.77 129.75 155 0.76 37.86 -7.45 247.99 -7.45 124.53 160 0.84 39.83 -8.00 239.80 -8.00 119.23 165 1.02 41.32 -8.40 227.92 -8.40 110.57 170 0.85 42.69 -8.76 235.26 -8.76 116.80 175 0.87 43.42 -8.94 233.16 -8.94 115.42 180 0.72 43.81 -9.04 241.26 -9.04 121.73 185 0.92 43.36 -8.93 229.99 -8.93 112.92 Frequency Coordination and Interference Analysis Report 06/11/2010 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 CASTLE ROCK, CO Licensee Name PanAmSat Licensee Corp Latitude (NAD 83) 39° 16' 38.0" N Longitude (NAD 83) 104° 48' 36.0" W Ground Elevation (AMSL) 2096.0 m / 6876.6 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model Vertex 4.6 KPC 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 -6.5 (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 1.31 42.25 -8.65 217.59 -8.65 102.41 195 1.21 41.14 -8.36 222.08 -8.36 105.77 200 1.40 39.34 -7.87 218.84 -7.87 102.41 205 2.01 36.79 -7.14 205.06 -7.14 100.00 210 2.31 34.24 -6.36 204.66 -6.36 100.00 215 2.43 32.16 -5.68 205.34 -5.68 100.00 220 2.74 30.49 -5.10 201.63 -5.10 100.00 225 2.79 29.76 -4.84 201.77 -4.84 100.00 230 2.86 29.76 -4.84 200.33 -4.84 100.00 235 2.97 30.49 -5.10 196.78 -5.10 100.00 240 3.10 31.89 -5.59 191.52 -5.59 100.00 245 3.16 33.98 -6.28 186.66 -6.28 100.00 250 3.27 36.54 -7.07 180.36 -7.07 100.00 255 3.49 39.43 -7.90 170.95 -7.90 100.00 260 4.20 42.38 -8.68 150.90 -8.68 100.00 265 5.52 45.37 -9.42 132.08 -9.42 100.00 270 5.97 49.11 -10.00 125.51 -10.00 100.00 275 5.98 53.20 -10.00 125.39 -10.00 100.00 280 5.67 57.50 -10.00 128.34 -10.00 100.00 285 5.67 61.76 -10.00 128.34 -10.00 100.00 290 6.15 65.98 -10.00 123.60 -10.00 100.00 295 5.83 70.42 -10.00 126.81 -10.00 100.00 300 6.30 74.78 -10.00 121.96 -10.00 100.00 305 6.21 79.24 -10.00 122.89 -10.00 100.00 310 5.68 83.74 -10.00 128.26 -10.00 100.00 315 5.55 88.20 -10.00 129.54 -10.00 100.00 320 5.45 92.66 -10.00 130.45 -10.00 100.00 325 5.70 97.12 -10.00 128.07 -10.00 100.00 330 6.51 101.65 -10.00 119.60 -10.00 100.00 335 7.69 106.28 -10.00 107.08 -10.00 100.00 340 7.68 110.76 -10.00 107.16 -10.00 100.00 345 7.79 115.23 -10.00 105.95 -10.00 100.00 350 7.53 118.60 -10.00 108.71 -10.00 100.00 355 7.53 113.63 -10.00 108.68 -10.00 100.00 Frequency Coordination and Interference Analysis Report 06/11/2010 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. Jeffrey E. Cowles Principal Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Va. 20147 DATED: June 11, 2010 Frequency Coordination and Interference Analysis Report 06/11/2010 Page 10 of 10


Document Created: 2010-06-28 09:33:56
Document Modified: 2010-06-28 09:33:56
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