Attachment Exh. A

This document pretains to SES-LIC-20050121-00082 for License on a Satellite Earth Station filing.

IBFS_SESLIC2005012100082_414134

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for INTELSAT, LLC HAGERSTOWN, MARYLAND Satellite Earth Station Prepared By: COMSEARCH 19700 JANELIA FARM BOULEVARD ASHBURN, VIRGINIA 20147 JANUARY 6, 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 01/06/2005 Page 2 of 100

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. 01/06/2005 Page 3 of 100

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 USCOC of Cumberland, Inc. Dobson Cellular Systems, Inc. Cellco Partnership - Newark – Dallas Route Intermedia Services, LLC Vanguard Cellular Pennsylvania, LLC No other carriers reported potential interference cases. 01/06/2005 Page 4 of 100

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 November 30, 2004. Company AT&T COMMUNICATIONS OF MARYLAND INC AT&T COMMUNICATIONS OF VIRGINIA INC AT&T COMMUNICATIONS OF WEST VIRGINIA AT&T CORP Atlantic Broadband (Delmar), LLC Atlantic Broadband (Penn), LLC BAY BROADBAND COMMUNICATIONS LLC COLLEGE OF SOUTHERN MARYLAND Cellco Partnership - Newark-Dallas-Route Cellco Partnership - Virginia Cellco Partnership- PA Region Charles County Corban Networks, Inc. Dobson Cellular Systems, Inc. Exelon Generation Company, L.L.C Frederick County Em. Comm. Center Hardy Cellular Telephone Company Intermedia Services, LLC. LB Tower Company LLC LOUDOUN COUNTY GOVERNMENT Local Communications Network, Inc. MARYLAND PUBLIC BROADCASTING COMMISSION MCI Worldcom Network Services, Inc. Maryland State Highway Administration Maryland, State of - DBM NATIONAL RADIO ASTRONOMY OBSERVATORY Nera Networks Inc. PENNSYLVANIA TURNPIKE COMMISSION PRINCE WILLIAM COUNTY STATE OF MARYLAND, MIEMSS Southwestern Bell Mobile Sys LLC - DC Susquehanna Electric Company USCOC of Cumberland, Inc. Vanguard Cellular Pennsylvania, LLC Virginia Electric & Power Company Virginia PCS Alliance, L.C. WEST VIRGINIA HEALTH & HUMAN RESOURCES Washington D.C. SMSA L.P. West Virginia Ems Tsn, Inc. 01/06/2005 Page 5 of 100

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. 01/06/2005 Page 6 of 100

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 01/03/2005 Job Number: 041130COMSJC06 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code INTELS Licensee Name Intelsat, LLC Site Information HAGERSTOWN, MARYLAND Venue Name Latitude (NAD 83) 39° 35' 59.6" N Longitude (NAD 83) 77° 45' 27.5" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 169.47 m / 556.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 89° W to 90° West Longitude Azimuth Range 197.3° to 198.8° Corresponding Elevation Angles 42.7° / 42.4° Antenna Centerline (AGL) 1.83 m / 6.0 ft Antenna Information Receive Transmit Manufacturer Channel Master Channel Master Model 1.8 Meter 1.8 Meter Gain / Diameter 35.4 dBi / 1.8 m 39.3 dBi / 1.8 m 3-dB / 15-dB Beamwidth 3.00° / 5.60° 2.00° / 3.90° Max Available RF Power (dBW/4 kHz) -12.0 (dBW/MHz) 12.0 Maximum EIRP (dBW/4 kHz) 27.3 (dBW/MHz) 51.3 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) 21K9G7W - 72M0G7W / 3700.0 - 4200.0 21K9G7W - 72M0G7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 293.5 km / 182.3 mi 140.9 km / 87.5 mi Precipitation Scatter Contour Radius 100.0 km / 62.1 mi 100.0 km / 62.1 mi 01/06/2005 Page 7 of 100

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values HAGERSTOWN, MD Licensee Name Intelsat, LLC Latitude (NAD 83) 39° 35' 59.6" N Longitude (NAD 83) 77° 45' 27.5" W Ground Elevation (AMSL) 169.47 m / 556.0 ft Antenna Centerline (AGL) 1.83 m / 6.0 ft Antenna Model Channel Master 1.8 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 -12.0 (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 0.37 134.65 -10.00 263.97 -10.00 123.97 5 0.30 136.06 -10.00 272.30 -10.00 129.65 10 0.26 137.05 -10.00 277.35 -10.00 133.04 15 0.27 137.50 -10.00 277.01 -10.00 132.81 20 0.30 137.52 -10.00 273.36 -10.00 130.37 25 0.30 137.03 -10.00 272.97 -10.00 130.10 30 0.28 136.06 -10.00 275.66 -10.00 131.90 35 0.22 134.63 -10.00 282.67 -10.00 135.34 40 0.21 132.87 -10.00 283.45 -10.00 135.87 45 0.26 130.80 -10.00 277.99 -10.00 133.46 50 0.29 128.41 -10.00 274.38 -10.00 131.05 55 0.34 125.78 -10.00 267.87 -10.00 126.65 60 0.33 122.89 -10.00 269.00 -10.00 127.42 65 0.00 119.65 -10.00 285.28 -10.00 137.12 70 0.20 116.54 -10.00 285.12 -10.00 137.01 75 0.24 113.23 -10.00 280.13 -10.00 133.63 80 0.23 109.78 -10.00 281.50 -10.00 134.55 85 0.00 106.20 -10.00 285.28 -10.00 137.12 90 0.00 102.63 -10.00 285.28 -10.00 137.12 95 0.00 99.02 -10.00 285.28 -10.00 137.12 100 0.00 95.37 -10.00 285.28 -10.00 137.12 105 0.00 91.70 -10.00 285.28 -10.00 137.12 110 0.00 88.03 -10.00 285.28 -10.00 137.12 115 0.00 84.36 -10.00 285.28 -10.00 137.12 120 0.00 80.72 -10.00 285.28 -10.00 137.12 125 0.00 77.10 -10.00 285.28 -10.00 137.12 130 0.00 73.54 -10.00 285.28 -10.00 137.12 135 0.00 70.04 -10.00 285.28 -10.00 137.12 140 0.00 66.62 -10.00 285.28 -10.00 137.12 145 0.00 63.31 -10.00 285.28 -10.00 137.12 150 0.00 60.12 -10.00 285.28 -10.00 137.12 155 0.00 57.09 -10.00 285.28 -10.00 137.12 160 0.00 54.24 -10.00 285.28 -10.00 137.12 165 0.00 51.61 -10.00 285.28 -10.00 137.12 170 0.00 49.24 -10.00 285.28 -10.00 137.12 175 0.00 47.18 -9.84 286.28 -9.84 137.58 180 0.00 45.45 -9.44 288.87 -9.44 138.75 01/06/2005 Page 8 of 100

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values HAGERSTOWN, MD Licensee Name Intelsat, LLC Latitude (NAD 83) 39° 35' 59.6" N Longitude (NAD 83) 77° 45' 27.5" W Ground Elevation (AMSL) 169.47 m / 556.0 ft Antenna Centerline (AGL) 1.83 m / 6.0 ft Antenna Model Channel Master 1.8 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 -12.0 (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) 185 0.00 44.12 -9.12 290.97 -9.12 139.71 190 0.00 43.18 -8.88 292.50 -8.88 140.42 195 0.00 42.58 -8.73 293.48 -8.73 140.87 200 0.20 42.25 -8.65 293.44 -8.65 140.70 205 0.47 42.34 -8.67 260.68 -8.67 119.69 210 0.61 43.04 -8.85 249.49 -8.85 112.12 215 0.86 44.09 -9.11 232.78 -9.11 100.08 220 1.12 45.56 -9.46 219.16 -9.46 100.00 225 1.27 47.52 -9.92 212.38 -9.92 100.00 230 1.35 49.87 -10.00 209.94 -10.00 100.00 235 1.30 52.58 -10.00 211.17 -10.00 100.00 240 1.13 55.59 -10.00 216.30 -10.00 100.00 245 1.02 58.74 -10.00 219.69 -10.00 100.00 250 0.95 62.01 -10.00 223.06 -10.00 100.00 255 0.89 65.40 -10.00 226.24 -10.00 100.00 260 0.83 68.89 -10.00 229.54 -10.00 100.00 265 0.74 72.47 -10.00 235.05 -10.00 103.20 270 0.64 76.10 -10.00 240.96 -10.00 107.65 275 0.51 79.78 -10.00 249.17 -10.00 113.65 280 0.40 83.48 -10.00 260.99 -10.00 121.91 285 0.31 87.19 -10.00 271.59 -10.00 129.17 290 0.34 90.89 -10.00 267.53 -10.00 126.42 295 0.32 94.60 -10.00 270.70 -10.00 128.57 300 0.37 98.29 -10.00 264.46 -10.00 124.31 305 0.48 101.98 -10.00 252.16 -10.00 115.70 310 0.49 105.60 -10.00 251.07 -10.00 114.92 315 0.52 109.18 -10.00 248.41 -10.00 113.10 320 0.47 112.66 -10.00 252.61 -10.00 116.03 325 0.32 115.98 -10.00 270.47 -10.00 128.42 330 0.25 119.21 -10.00 279.20 -10.00 133.01 335 0.38 122.40 -10.00 263.04 -10.00 123.33 340 0.52 125.44 -10.00 248.27 -10.00 113.00 345 0.45 128.15 -10.00 254.87 -10.00 117.62 350 0.37 130.58 -10.00 264.09 -10.00 124.06 355 0.32 132.74 -10.00 270.58 -10.00 128.49 01/06/2005 Page 9 of 100

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 BLVD. ASHBURN, VA 20147 DATED: JANUARY 6, 2005 01/06/2005 Page 10 of 100


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Document Modified: 2005-01-24 11:13:24
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