Attachment Coordination study

This document pretains to SES-STA-20100426-00475 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2010042600475_812643

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Universal Space Network, Inc. North Pole, Alaska Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 August 29, 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 08/29/2009 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 08/29/2009 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 transmit and receive earth station. Company None No carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 08/29/2009 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. Expedited coordination data for this earth station was emailed and sent to the below listed carriers with a letter dated August 19, 2009. Company ANCHORAGE BROADCAST TV CONSORTIUM, INC. Alaska Broadcasting Company, Inc Alaska Public Telecommunications, Inc. Channel 2 Broadcasting Co. - KTUU TV FIREWEED COMMUNICATIONS CORP Piedmont Television of Anchorage License Smith Media License Holdings, LLC Society of Broadcast Engineers – Alaska Representative State of Alaska Frequency Coordination and Interference Analysis Report 08/29/2009 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 08/29/2009 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 08/29/2009 Job Number: 090819COMSJC01 Administrative Information Status ENGINEER PROPOSAL Call Sign NORTH PO Licensee Code UNSPNE Licensee Name Universal Space Network, Inc. Site Information NORTH POLE, ALASKA Venue Name Latitude (NAD 83) 64° 48' 15.3" N Longitude (NAD 83) 147° 30' 0.8" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 140.66 m / 461.5 ft Link Information Satellite Type Low Earth Orbit Mode TR – Transmit/Receive Modulation Digital Minimum Elevation Angle 5.0° Azimuth Range 0.0° to 360° Antenna Centerline (AGL) 8.54 m / 28.0 ft Antenna Information Receive Transmit Manufacturer Datron Datron Model 1453 1453 Gain / Diameter 46.9 dBi / 13.0 m 45.9 dBi / 13.0 m 3-dB / 15-dB Beamwidth 0.78° / 1.46° 0.76° / 1.46° Max Available RF Power (dBW/4 kHz) 5.1 (dBW/MHz) 22.1 Maximum EIRP (dBW/4 kHz) 51.0 (dBW/MHz) 68.0 (dBW) 68.0 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 2.2 GHz Transmit 2.0 GHz Emission / Frequency Range (MHz) 200KG2D / 2218.7511 200KG2D / 2043.1000 Max Great Circle Coordination Distance 559.9 km / 347.9 mi 476.4 km / 296.0 mi Precipitation Scatter Contour Radius 100.0 km / 62.1 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 08/29/2009 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 NORTH POLE, AK Licensee Name Universal Space Network, Inc. Latitude (NAD 83) 64° 48' 15.3" N Longitude (NAD 83) 147° 30' 0.8" W Ground Elevation (AMSL) 140.66 m / 461.5 ft Antenna Centerline (AGL) 8.54 m / 28.0 ft Antenna Model Datron 1453 Antenna Mode Receive 2.2 GHz Transmit 2.0 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 5.1 (dBW/4 kHz) Receive 2.2 GHz Transmit 2.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 0.85 5.00 4.50 436.30 4.50 340.80 5 1.20 5.00 4.50 414.80 4.50 317.10 10 1.19 5.00 4.50 415.30 4.50 317.70 15 1.02 5.00 4.50 425.10 4.50 328.60 20 0.94 5.00 4.50 430.20 4.50 331.10 25 0.76 5.00 4.50 422.90 4.50 348.10 30 0.75 5.00 4.50 443.60 4.50 348.90 35 0.48 5.00 4.50 467.90 4.50 375.60 40 0.32 5.00 4.50 487.20 4.50 396.90 45 0.00 5.00 4.50 559.90 4.50 476.40 50 0.00 5.00 4.50 559.90 4.50 476.40 55 0.00 5.00 4.50 559.90 4.50 476.40 60 0.00 5.00 4.50 559.90 4.50 476.40 65 0.00 5.00 4.50 559.90 4.50 476.40 70 0.00 5.00 4.50 559.90 4.50 476.40 75 0.00 5.00 4.50 559.90 4.50 476.40 80 0.00 5.00 4.50 559.90 4.50 476.40 85 0.00 5.00 4.50 559.90 4.50 476.40 90 0.00 5.00 4.50 559.90 4.50 476.40 95 0.00 5.00 4.50 559.90 4.50 476.40 100 0.00 5.00 4.50 559.90 4.50 476.40 105 0.00 5.00 4.50 559.90 4.50 476.40 110 0.00 5.00 4.50 559.90 4.50 476.40 115 0.00 5.00 4.50 559.90 4.50 476.40 120 0.00 5.00 4.50 559.90 4.50 476.40 125 0.00 5.00 4.50 559.90 4.50 476.40 130 0.00 5.00 4.50 559.90 4.50 476.40 135 0.00 5.00 4.50 559.90 4.50 476.40 140 0.00 5.00 4.50 559.90 4.50 476.40 145 0.00 5.00 4.50 559.90 4.50 476.40 150 0.00 5.00 4.50 559.90 4.50 476.40 155 0.00 5.00 4.50 559.90 4.50 476.40 160 0.00 5.00 4.50 559.90 4.50 476.40 165 0.00 5.00 4.50 559.90 4.50 476.40 170 0.00 5.00 4.50 559.90 4.50 476.40 175 0.00 5.00 4.50 559.90 4.50 476.40 180 0.00 5.00 4.50 559.90 4.50 476.40 185 0.00 5.00 4.50 559.90 4.50 476.40 Frequency Coordination and Interference Analysis Report 08/29/2009 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 NORTH POLE, AK Licensee Name Universal Space Network, Inc. Latitude (NAD 83) 64° 48' 15.3" N Longitude (NAD 83) 147° 30' 0.8" W Ground Elevation (AMSL) 140.66 m / 461.5 ft Antenna Centerline (AGL) 8.54 m / 28.0 ft Antenna Model Datron 1453 Antenna Mode Receive 2.2 GHz Transmit 2.0 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 5.1 (dBW/4 kHz) Receive 2.2 GHz Transmit 2.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.00 5.00 4.50 559.90 4.50 476.40 200 0.00 5.00 4.50 559.90 4.50 476.40 205 0.00 5.00 4.50 559.90 4.50 476.40 210 0.00 5.00 4.50 559.90 4.50 476.40 215 0.00 5.00 4.50 559.90 4.50 476.40 220 0.00 5.00 4.50 559.90 4.50 476.40 225 0.00 5.00 4.50 559.90 4.50 476.40 230 0.00 5.00 4.50 559.90 4.50 476.40 235 0.00 5.00 4.50 559.90 4.50 476.40 240 0.00 5.00 4.50 559.90 4.50 476.40 245 0.00 5.00 4.50 559.90 4.50 476.40 250 0.00 5.00 4.50 559.90 4.50 476.40 255 0.00 5.00 4.50 559.90 4.50 476.40 260 0.00 5.00 4.50 559.90 4.50 476.40 265 0.00 5.00 4.50 559.90 4.50 476.40 270 0.00 5.00 4.50 559.90 4.50 476.40 275 0.00 5.00 4.50 559.90 4.50 476.40 280 0.00 5.00 4.50 559.90 4.50 476.40 285 0.00 5.00 4.50 559.90 4.50 476.40 290 0.00 5.00 4.50 559.90 4.50 476.40 295 0.00 5.00 4.50 559.90 4.50 476.40 300 0.00 5.00 4.50 559.90 4.50 476.40 305 0.00 5.00 4.50 559.90 4.50 476.40 310 0.35 5.00 4.50 483.20 4.50 392.50 315 0.96 5.00 4.50 428.90 4.50 327.70 320 0.60 5.00 4.50 456.10 4.50 362.70 325 0.80 5.00 4.50 439.90 4.50 344.80 330 0.82 5.00 4.50 438.40 4.50 343.20 335 0.69 5.00 4.50 448.40 4.50 354.20 340 0.94 5.00 4.50 430.20 4.50 334.10 345 1.16 5.00 4.50 417.00 4.50 319.50 350 1.18 5.00 4.50 415.90 4.50 318.30 355 1.23 5.00 4.50 413.10 4.50 315.30 Frequency Coordination and Interference Analysis Report 08/29/2009 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. Jeffrey E. Cowles Principal Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Va. 20147 DATED: August 29, 2009 Frequency Coordination and Interference Analysis Report 08/29/2009 Page 10 of 10


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Document Modified: 2010-04-26 11:20:17
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