Attachment Exhibit A

This document pretains to SES-MOD-20101203-01496 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010120301496_854985

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for GCI Communication Corporation PLATINUM, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 November 18, 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 11/18/2010 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 11/18/2010 Page 3 of 10

2. SUMMARY OF RESULTS There were no great circle interference cases dentified during the interference study of the proposed earth station. No carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 11/18/2010 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 a letter dated 11/01/2010. Company NUSHAGAK ELECTRIC & TELEPHONE COOP Unicom, Inc. Frequency Coordination and Interference Analysis Report 11/18/2010 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 11/18/2010 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 11/18/2010 Job Number: 101118COMSTC01 Administrative Information Call Sign E000629 Licensee Code P3203 Licensee Name GCI Communication Corporation Site Information PLATINUM, AK Latitude (NAD 83) 59° 0' 44.8" N Longitude (NAD 83) 161° 49' 2.2" W Climate Zone B Rain Zone 2 Ground Elevation (AMSL) 4.57 m / 15.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 100° W to 194° West Longitude Azimuth Range 114.7° to 216.3° Corresponding Elevation Angles 5.4° / 17.5° Antenna Centerline (AGL) 1.83 m / 6.0 ft Antenna Information Receive - S40362 Transmit - S60362 Manufacturer SCIENTIFIC-ATLANTA, INC SCIENTIFIC-ATLANTA, INC Model 8136 8136 Gain / Diameter 41.8 dBi / 3.6 m 45.6 dBi / 3.6 m 3-dB / 15-dB Beamwidth 1.40° / 3.00° 0.90° / 1.70° 6K72G7W - 36M0G7W 6K72D7W - 36M0D7W Max Available RF Power (dBW/4 kHz) -2.7 -14.0 (dBW/MHz) -0.45 10.0 Maximum EIRP (dBW/4 kHz) 42.9 29.07 (dBW/MHz) 45.15 53.07 (dBW) 45.15 68.61 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) 6K72G7W - 36M0G7W / 3700.0 - 4200.0 6K72G7W - 36M0G7W / 5925.0 - 6425.0 6K72D7W - 36M0D7W / 3700.0 - 4200.0 6K72D7W - 36M0D7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 552.9 km / 343.5 mi 314.8 km / 195.6 mi Precipitation Scatter Contour Radius 611.0 km / 379.6 mi 101.3 km / 63.0 mi Frequency Coordination and Interference Analysis Report 11/18/2010 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 PLATINUM, AK Licensee Name GCI Communication Corporation Latitude (NAD 83) 59° 0' 44.8" N Longitude (NAD 83) 161° 49' 2.2" W Ground Elevation (AMSL) 4.57 m / 15.0 ft Antenna Centerline (AGL) 1.83 m / 6.0 ft Antenna Model SCIENTIFIC-ATLANTA, INC 8136 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 -2.7 (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 1.87 114.62 -10.20 204.90 -10.40 101.35 5 0.85 109.61 -10.20 269.26 -10.40 128.17 10 0.85 104.63 -10.20 269.24 -10.40 128.16 15 0.85 99.64 -10.20 269.25 -10.40 128.17 20 0.85 94.66 -10.20 269.23 -10.40 128.16 25 0.00 89.68 -10.20 409.73 -10.40 198.50 30 0.00 84.70 -10.20 409.73 -10.40 198.50 35 0.00 79.72 -10.20 409.73 -10.40 198.50 40 0.00 74.74 -10.20 409.73 -10.40 198.50 45 0.00 69.77 -10.20 409.73 -10.40 198.50 50 0.00 64.79 -10.20 409.73 -10.40 198.50 55 0.00 59.82 -10.20 409.73 -10.40 198.50 60 0.00 54.85 -10.20 409.73 -10.40 198.50 65 0.00 49.89 -10.18 410.00 -10.38 198.63 70 0.41 44.89 -9.18 354.83 -9.38 170.02 75 0.69 39.91 -8.16 309.69 -8.36 146.56 80 0.45 34.98 -6.20 373.59 -6.40 178.05 85 0.31 30.07 -5.21 432.01 -5.41 206.89 90 0.38 25.15 -3.26 433.89 -3.46 206.80 95 0.63 20.23 -0.34 402.67 -0.54 189.88 100 1.06 15.29 2.62 360.89 2.42 168.78 105 1.13 10.57 6.23 395.70 6.03 184.74 110 1.26 6.25 9.30 422.18 9.10 197.03 115 1.26 4.17 13.46 552.86 13.26 314.78 120 1.26 6.13 9.54 464.76 9.34 239.14 125 1.26 8.34 7.80 415.20 7.60 201.15 130 1.80 9.93 6.87 344.37 6.67 159.37 135 2.60 11.16 5.64 282.71 5.44 131.19 140 3.05 12.55 4.25 251.49 4.60 118.94 145 3.50 13.77 3.03 225.72 3.83 111.58 150 3.30 15.43 2.54 229.76 2.34 110.42 155 2.27 17.69 1.19 263.65 0.99 123.13 160 3.49 17.57 1.26 214.49 1.06 103.83 165 4.49 17.41 1.35 190.87 1.15 100.00 170 4.49 18.01 0.99 188.81 0.79 100.00 175 4.49 18.37 0.78 187.59 0.58 100.00 180 5.10 17.89 1.07 180.95 0.87 100.00 185 5.10 17.77 1.14 181.34 0.94 100.00 Frequency Coordination and Interference Analysis Report 11/18/2010 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 PLATINUM, AK Licensee Name GCI Communication Corporation Latitude (NAD 83) 59° 0' 44.8" N Longitude (NAD 83) 161° 49' 2.2" W Ground Elevation (AMSL) 4.57 m / 15.0 ft Antenna Centerline (AGL) 1.83 m / 6.0 ft Antenna Model SCIENTIFIC-ATLANTA, INC 8136 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 -2.7 (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 5.10 17.40 1.36 182.52 1.16 100.00 195 5.10 16.81 1.71 184.50 1.51 100.00 200 4.09 16.97 1.62 197.94 1.42 100.00 205 4.09 15.92 2.25 201.75 2.05 100.00 210 4.09 14.66 2.80 205.16 2.94 100.55 215 4.09 13.51 3.29 208.21 4.09 103.88 220 3.49 14.53 2.80 224.64 3.07 109.59 225 3.49 16.50 1.90 218.69 1.70 105.68 230 3.49 19.55 0.07 207.01 -0.13 100.45 235 3.49 23.26 -2.16 193.35 -2.36 100.00 240 3.49 27.36 -4.15 181.73 -4.35 100.00 245 3.48 31.71 -5.54 174.05 -5.74 100.00 250 2.47 36.57 -6.83 200.64 -7.03 100.00 255 3.69 40.76 -8.35 154.56 -8.55 100.00 260 3.69 45.44 -9.29 150.33 -9.49 100.00 265 3.69 50.17 -10.20 146.59 -10.40 100.00 270 3.69 54.94 -10.20 146.59 -10.40 100.00 275 3.69 59.73 -10.20 146.60 -10.40 100.00 280 3.69 64.54 -10.20 146.59 -10.40 100.00 285 3.69 69.37 -10.20 146.60 -10.40 100.00 290 3.69 74.21 -10.20 146.59 -10.40 100.00 295 4.70 79.01 -10.20 133.33 -10.40 100.00 300 4.70 83.88 -10.20 133.32 -10.40 100.00 305 4.70 88.75 -10.20 133.33 -10.40 100.00 310 4.70 93.63 -10.20 133.33 -10.40 100.00 315 4.70 98.50 -10.20 133.32 -10.40 100.00 320 4.70 103.37 -10.20 133.32 -10.40 100.00 325 3.28 108.12 -10.20 156.16 -10.40 100.00 330 3.28 112.95 -10.20 156.16 -10.40 100.00 335 3.28 117.76 -10.20 156.16 -10.40 100.00 340 3.28 122.55 -10.20 156.16 -10.40 100.00 345 1.87 127.03 -10.20 204.93 -10.40 101.36 350 1.87 124.60 -10.20 204.92 -10.40 101.36 355 1.87 119.61 -10.20 204.93 -10.40 101.36 Frequency Coordination and Interference Analysis Report 11/18/2010 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. Timothy O. Crutcher Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: November 18, 2010 Frequency Coordination and Interference Analysis Report 11/18/2010 Page 10 of 10


Document Created: 2010-12-02 15:10:05
Document Modified: 2010-12-02 15:10:05
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC