Attachment Freq Coord-E990444

This document pretains to SES-LIC-20100615-00705 for License on a Satellite Earth Station filing.

IBFS_SESLIC2010061500705_822582

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for WATERFALL GROUP, LTD. WATERFALL, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 June 09, 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 06/09/2010 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 06/09/2010 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 proposed transmit-receive earth station. Company ALASCOM, INC. No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 06/09/2010 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 06/09/2010. Company ALASCOM, INC. AP&T Wireless, Inc. Frequency Coordination and Interference Analysis Report 06/09/2010 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 06/09/2010 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 06/09/2010 Job Number: 100609COMSTC16 Administrative Information Licensee Name WATERFALL GROUP, LTD. Site Information WATERFALL, AK Latitude (NAD 83) 55° 17' 47.8" N Longitude (NAD 83) 133° 14' 36.0" W Climate Zone B Rain Zone 3 Ground Elevation (AMSL) 11.1 m / 36.4 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Analog and Digital Satellite Arc 69° W to 143° West Longitude Azimuth Range 111.6° to 191.8° Corresponding Elevation Angles 5.7° / 26.3° Antenna Centerline (AGL) 2.44 m / 8.0 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 -16.53 (dBW/MHz) -0.45 7.47 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 511.1 km / 317.5 mi 295.7 km / 183.7 mi Precipitation Scatter Contour Radius 425.4 km / 264.3 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 06/09/2010 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 WATERFALL, AK Licensee Name WATERFALL GROUP, LTD. Latitude (NAD 83) 55° 17' 47.8" N Longitude (NAD 83) 133° 14' 36.0" W Ground Elevation (AMSL) 11.1 m / 36.4 ft Antenna Centerline (AGL) 2.44 m / 8.0 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 8.40 111.61 -10.20 116.73 -10.40 100.00 5 8.99 106.61 -10.20 115.41 -10.40 100.00 10 9.25 101.62 -10.20 114.84 -10.40 100.00 15 8.87 96.63 -10.20 115.67 -10.40 100.00 20 8.39 91.64 -10.20 116.75 -10.40 100.00 25 8.30 86.64 -10.20 116.95 -10.40 100.00 30 7.39 81.64 -10.20 118.98 -10.40 100.00 35 6.63 76.64 -10.20 118.96 -10.40 100.00 40 5.36 71.64 -10.20 126.79 -10.40 100.00 45 5.96 66.64 -10.20 120.79 -10.40 100.00 50 6.56 61.64 -10.20 119.11 -10.40 100.00 55 6.56 56.64 -10.20 119.10 -10.40 100.00 60 7.09 51.65 -10.20 117.91 -10.40 100.00 65 7.09 46.66 -9.53 119.94 -9.73 100.00 70 7.58 41.67 -8.53 121.92 -8.73 100.00 75 7.58 36.68 -6.87 127.51 -7.07 100.00 80 7.79 31.70 -5.54 131.79 -5.74 100.00 85 9.25 26.86 -3.94 133.72 -4.14 100.00 90 10.46 22.14 -1.48 138.60 -1.68 100.00 95 13.69 18.42 0.75 128.74 0.55 100.00 100 13.68 14.10 2.80 136.25 3.50 100.00 105 13.69 10.40 6.40 150.73 6.20 100.00 110 18.93 12.20 4.60 511.07 4.60 295.73 115 18.98 9.79 7.01 353.32 6.81 207.86 120 18.20 6.74 8.32 206.94 8.12 134.04 125 22.47 8.33 7.80 111.95 7.60 100.00 130 22.46 6.25 9.31 116.34 9.11 100.00 135 19.96 2.05 21.50 176.92 21.30 100.00 140 23.20 3.25 16.30 133.13 16.10 100.00 145 19.42 1.97 21.97 183.68 21.77 100.00 150 17.15 5.61 10.58 146.50 10.38 100.00 155 17.17 6.83 8.14 136.63 7.94 100.00 160 14.86 10.15 6.65 144.50 6.45 100.00 165 12.57 13.27 3.53 145.96 4.33 100.00 170 8.74 17.70 1.18 156.83 0.98 100.00 175 5.26 21.56 -1.14 166.87 -1.34 100.00 180 3.05 23.90 -2.54 205.19 -2.74 100.00 185 4.40 22.42 -1.65 175.37 -1.85 100.00 Frequency Coordination and Interference Analysis Report 06/09/2010 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 WATERFALL, AK Licensee Name WATERFALL GROUP, LTD. Latitude (NAD 83) 55° 17' 47.8" N Longitude (NAD 83) 133° 14' 36.0" W Ground Elevation (AMSL) 11.1 m / 36.4 ft Antenna Centerline (AGL) 2.44 m / 8.0 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 3.74 22.68 -1.81 187.54 -2.01 100.00 195 4.36 22.20 -1.52 176.60 -1.72 100.00 200 5.81 22.04 -1.43 157.22 -1.63 100.00 205 6.21 23.91 -2.55 148.86 -2.75 100.00 210 6.87 26.40 -3.76 141.52 -3.96 100.00 215 7.67 29.45 -4.98 134.26 -5.18 100.00 220 7.41 33.52 -5.90 131.50 -6.10 100.00 225 7.61 37.58 -7.23 126.19 -7.43 100.00 230 7.19 42.06 -8.61 122.62 -8.81 100.00 235 6.73 46.62 -9.52 120.81 -9.72 100.00 240 6.39 51.20 -10.20 119.50 -10.40 100.00 245 5.92 55.84 -10.20 121.15 -10.40 100.00 250 5.09 60.58 -10.20 129.75 -10.40 100.00 255 3.61 65.42 -10.20 148.39 -10.40 100.00 260 1.79 70.25 -10.20 208.47 -10.40 103.01 265 1.38 74.80 -10.20 230.45 -10.40 112.72 270 2.10 79.24 -10.20 194.66 -10.40 100.00 275 3.08 83.75 -10.20 161.55 -10.40 100.00 280 3.25 88.33 -10.20 156.92 -10.40 100.00 285 3.21 92.93 -10.20 158.17 -10.40 100.00 290 2.97 97.51 -10.20 164.51 -10.40 100.00 295 2.64 102.06 -10.20 175.12 -10.40 100.00 300 2.15 106.54 -10.20 192.75 -10.40 100.00 305 1.32 110.90 -10.20 233.98 -10.40 114.20 310 1.03 115.28 -10.20 250.40 -10.40 119.11 315 0.00 119.38 -10.20 409.73 -10.40 198.50 320 0.00 123.65 -10.20 409.73 -10.40 198.50 325 0.00 127.83 -10.20 409.73 -10.40 198.50 330 0.00 131.91 -10.20 409.73 -10.40 198.50 335 0.37 136.03 -10.20 355.45 -10.40 170.79 340 2.32 131.55 -10.20 186.58 -10.40 100.00 345 4.71 126.63 -10.20 133.17 -10.40 100.00 350 6.08 121.64 -10.20 120.25 -10.40 100.00 355 7.28 116.63 -10.20 117.48 -10.40 100.00 Frequency Coordination and Interference Analysis Report 06/09/2010 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: June 09, 2010 Frequency Coordination and Interference Analysis Report 06/09/2010 Page 10 of 10

WATERFALL GROUP, LTD. Legend: Scale: 1:10,000,000 Great Circle: 6.1 GHz 4.0 GHz 19700 Janelia Farm Boulevard Ashburn, VA 20147 Precipitation Scatter: 6.1 GHz 4.0 GHz Earth Station Site:


Document Created: 2010-06-11 14:43:41
Document Modified: 2010-06-11 14:43:41
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC