Attachment Exhibit A

This document pretains to SES-STA-20100121-00106 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2010012100106_795749

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for TELESAT MAUNA KEA, HI Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 October 30, 2009

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 10/26/2009 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 10/26/2009 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 proposed transmit-receive earth station. Company University of Hawaii New Cingular Wireless PCS LLC – Hawaii Hawaiian Telcom (debtor-in-possession) Hawaii State No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 10/26/2009 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 09/29/2009. Company HAWAII COUNTY OF Hawaii State Hawaiian Telcom (debtor-in-possession) New Cingular Wireless PCS LLC - Hawaii Nextel WIP License Corp. University of Hawaii Frequency Coordination and Interference Analysis Report 10/26/2009 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 10/26/2009 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 10/22/2009 Job Number: 090929COMSGE01 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code TELEDS Licensee Name TELESAT Site Information MAUNA KEA, HI Venue Name Latitude (NAD 83) 19° 45' 38.6" N Longitude (NAD 83) 155° 28' 3.6" W Climate Zone B Rain Zone 4 Ground Elevation (AMSL) 2733.45 m / 8968.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 81° W to 143° West Longitude Azimuth Range 95.4° to 146.8° Corresponding Elevation Angles 5.9° / 62.8° Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Vertex Vertex Model 2.4 Meter SF 2.4 Meter SF Gain / Diameter 38.2 dBi / 2.4 m 42.1 dBi / 2.4 m 3-dB / 15-dB Beamwidth 2.12° / 4.45° 1.37° / 2.88° Max Available RF Power (dBW/4 kHz) -13.0 (dBW/MHz) 11.0 Maximum EIRP (dBW/4 kHz) 29.1 (dBW/MHz) 53.1 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) 3M60G7D / 3700.0 - 4200.0 3M60G7D / 5925.0 - 6425.0 Max Great Circle Coordination Distance 471.1 km / 292.7 mi 196.8 km / 122.2 mi Precipitation Scatter Contour Radius 422.3 km / 262.4 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 10/26/2009 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 MAUNA KEA, HI Licensee Name TELESAT Latitude (NAD 83) 19° 45' 38.6" N Longitude (NAD 83) 155° 28' 3.6" W Ground Elevation (AMSL) 2733.45 m / 8968.0 ft Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Model Vertex 2.4 meter SF 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 -13.0 (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 17.33 95.26 -10.00 100.00 -10.00 100.00 5 17.79 90.36 -10.00 100.00 -10.00 100.00 10 17.95 85.47 -10.00 100.00 -10.00 100.00 15 18.24 80.59 -10.00 100.00 -10.00 100.00 20 17.92 75.70 -10.00 100.00 -10.00 100.00 25 17.45 70.78 -10.00 100.00 -10.00 100.00 30 17.58 65.91 -10.00 100.00 -10.00 100.00 35 16.72 60.94 -10.00 100.00 -10.00 100.00 40 15.48 55.91 -10.00 100.00 -10.00 100.00 45 14.72 50.92 -10.00 100.00 -10.00 100.00 50 13.67 45.88 -9.54 100.00 -9.54 100.00 55 12.89 40.86 -8.28 106.02 -8.28 100.00 60 12.85 35.95 -6.89 110.38 -6.89 100.00 65 12.60 31.02 -5.29 116.27 -5.29 100.00 70 13.37 26.36 -3.53 118.21 -3.53 100.00 75 15.42 22.35 -1.73 114.67 -1.73 100.00 80 15.25 17.65 0.83 121.26 0.83 100.00 85 14.10 12.60 4.49 140.35 4.49 100.00 90 12.66 7.42 10.23 177.01 10.23 100.00 95 11.89 2.50 22.04 471.08 22.04 196.76 100 10.38 2.73 21.08 268.63 21.08 100.00 105 9.52 7.68 9.87 200.20 9.87 100.00 110 7.61 13.01 4.14 175.82 4.14 100.00 115 5.78 18.31 0.43 166.57 0.43 100.00 120 4.74 23.29 -2.18 168.41 -2.18 100.00 125 4.25 28.03 -4.19 163.83 -4.19 100.00 130 5.63 32.00 -5.63 141.11 -5.63 100.00 135 2.81 37.54 -7.36 184.96 -7.36 100.00 140 1.21 42.54 -8.72 250.73 -8.72 100.00 145 1.87 46.53 -9.69 208.01 -9.69 100.00 150 3.91 49.70 -10.00 142.29 -10.00 100.00 155 5.66 52.59 -10.00 124.45 -10.00 100.00 160 7.89 54.44 -10.00 118.46 -10.00 100.00 165 12.87 52.30 -10.00 100.95 -10.00 100.00 170 13.30 53.35 -10.00 100.00 -10.00 100.00 175 15.04 53.67 -10.00 100.00 -10.00 100.00 180 16.66 54.56 -10.00 100.00 -10.00 100.00 185 18.09 56.04 -10.00 100.00 -10.00 100.00 Frequency Coordination and Interference Analysis Report 10/26/2009 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 MAUNA KEA, HI Licensee Name TELESAT Latitude (NAD 83) 19° 45' 38.6" N Longitude (NAD 83) 155° 28' 3.6" W Ground Elevation (AMSL) 2733.45 m / 8968.0 ft Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Model Vertex 2.4 meter SF 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 -13.0 (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 19.42 58.00 -10.00 100.00 -10.00 100.00 195 20.33 60.54 -10.00 100.00 -10.00 100.00 200 18.43 64.64 -10.00 100.00 -10.00 100.00 205 18.84 67.70 -10.00 100.00 -10.00 100.00 210 18.83 71.05 -10.00 100.00 -10.00 100.00 215 17.38 74.88 -10.00 100.00 -10.00 100.00 220 17.38 78.28 -10.00 100.00 -10.00 100.00 225 15.86 81.96 -10.00 100.00 -10.00 100.00 230 16.22 85.32 -10.00 100.00 -10.00 100.00 235 13.20 88.82 -10.00 100.00 -10.00 100.00 240 11.34 91.98 -10.00 107.76 -10.00 100.00 245 11.96 95.16 -10.00 105.00 -10.00 100.00 250 9.77 97.88 -10.00 114.27 -10.00 100.00 255 7.71 100.28 -10.00 118.85 -10.00 100.00 260 9.26 103.52 -10.00 115.40 -10.00 100.00 265 9.26 106.30 -10.00 115.39 -10.00 100.00 270 9.24 108.97 -10.00 115.44 -10.00 100.00 275 9.18 111.50 -10.00 115.59 -10.00 100.00 280 8.91 113.78 -10.00 116.19 -10.00 100.00 285 7.46 115.07 -10.00 117.67 -10.00 100.00 290 6.74 116.54 -10.00 119.32 -10.00 100.00 295 6.20 117.89 -10.00 120.57 -10.00 100.00 300 6.09 119.33 -10.00 120.83 -10.00 100.00 305 7.42 121.82 -10.00 117.76 -10.00 100.00 310 8.06 123.54 -10.00 118.06 -10.00 100.00 315 9.67 125.95 -10.00 114.49 -10.00 100.00 320 10.79 127.66 -10.00 110.24 -10.00 100.00 325 11.90 129.07 -10.00 105.29 -10.00 100.00 330 12.60 125.10 -10.00 102.14 -10.00 100.00 335 13.86 120.05 -10.00 100.00 -10.00 100.00 340 14.07 115.10 -10.00 100.00 -10.00 100.00 345 14.79 110.12 -10.00 100.00 -10.00 100.00 350 15.88 105.13 -10.00 100.00 -10.00 100.00 355 16.93 100.18 -10.00 100.00 -10.00 100.00 Frequency Coordination and Interference Analysis Report 10/26/2009 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: October 30, 2009 Frequency Coordination and Interference Analysis Report 10/26/2009 Page 10 of 10


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Document Modified: 2010-01-21 14:07:08
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