Attachment Coordination Report

This document pretains to SES-LIC-20110427-00505 for License on a Satellite Earth Station filing.

IBFS_SESLIC2011042700505_885636

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Americom Government Services, Inc. ATLANTA, GA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 April 26, 2011

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 04/26/2011 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 04/26/2011 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 Verizon Wireless (VAW) LLC (Georgia) No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 04/26/2011 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 03/25/2011. Company ALLTEL Communications, LLC Allied Wireless Communications Corp. Athens Cellular, Inc. Bell Atlantic Mobile Allentown-Verizon W COBB COUNTY Cellco Partnership dba Verizon Wire (GA) Cellco Partnership-Newark-Dallas Verizon Conterra Ultra Broadband, LLC County of Forsyth Coweta County DeKalb County Police Department FLINT ELECTRIC MEMBERSHIP CORPORATION FULTON, COUNTY OF GWINNETT, COUNTY OF Georgia Southern and Florida Railway Co Georgia System Operations Corporation Greene County EOC/E-911 HOUSTON, COUNTY OF Hall County 9-1-1 International Communications Group, Inc. Jackson Electric Membership Corporation Norfolk Southern Railway Oconee County Sheriffs Office Open Range Communications Public Service Telephone Company SOUTHERN COMPANY SERVICES INC Southwestco Wireless LP (Georgia 5) Troy University Radio & Television Verizon Wireless (VAW) LLC (Georgia) Verizon Wireless of The East LP - (GA) Verizon Wireless of the East LP- Alabama Frequency Coordination and Interference Analysis Report 04/26/2011 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 04/26/2011 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 04/25/2011 Job Number: 110325COMSGE02 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code AMGOSE Licensee Name Americom Government Services, Inc. Site Information ATLANTA, GA Venue Name Latitude (NAD 83) 33° 22' 46.9" N Longitude (NAD 83) 84° 17' 41.6" W Climate Zone A Rain Zone 1 Ground Elevation (AMSL) 269.9 m / 885.5 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 37° W to 139° West Longitude Azimuth Range 116.9° to 248.7° Corresponding Elevation Angles 26.7° / 20.7° Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Prodelin Prodelin Model 1385 1385 Gain / Diameter 42.0 dBi / 3.8 m 46.5 dBi / 3.8 m 3-dB / 15-dB Beamwidth 1.40° / 2.80° 1.00° / 2.00° Max Available RF Power (dBW/4 kHz) -16.7 (dBW/MHz) 7.3 Maximum EIRP (dBW/4 kHz) 29.8 (dBW/MHz) 53.8 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) 252KG7W - 36M0F8W / 3700.0 - 4200.0 252KG7W - 36M0F8W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 329.0 km / 204.4 mi 141.9 km / 88.1 mi Precipitation Scatter Contour Radius 577.7 km / 358.9 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 04/26/2011 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 ATLANTA, GA Licensee Name Americom Government Services, Inc. Latitude (NAD 83) 33° 22' 46.9" N Longitude (NAD 83) 84° 17' 41.6" W Ground Elevation (AMSL) 269.9 m / 885.5 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Prodelin 3.8 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 -16.7 (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 0.21 109.87 -10.00 284.19 -10.00 124.95 5 0.25 109.52 -10.00 278.80 -10.00 121.43 10 0.24 105.10 -10.00 280.16 -10.00 122.32 15 0.29 100.66 -10.00 273.90 -10.00 118.20 20 0.24 96.19 -10.00 280.13 -10.00 122.30 25 0.26 91.72 -10.00 277.32 -10.00 120.46 30 0.26 87.25 -10.00 277.32 -10.00 120.46 35 0.26 82.77 -10.00 277.81 -10.00 120.78 40 0.21 78.32 -10.00 284.56 -10.00 125.19 45 0.00 73.91 -10.00 285.28 -10.00 125.65 50 0.00 69.51 -10.00 285.28 -10.00 125.65 55 0.21 65.10 -10.00 284.37 -10.00 125.07 60 0.25 60.76 -10.00 279.26 -10.00 121.74 65 0.28 56.49 -10.00 275.50 -10.00 119.26 70 0.24 52.32 -10.00 280.53 -10.00 122.57 75 0.00 48.36 -10.00 285.28 -10.00 125.65 80 0.00 44.44 -9.19 290.46 -9.19 127.78 85 0.00 40.71 -8.24 296.71 -8.24 130.32 90 0.00 37.22 -7.27 303.24 -7.27 132.93 95 0.00 34.05 -6.30 309.88 -6.30 134.29 100 0.00 31.30 -5.39 316.92 -5.39 136.86 105 0.00 29.09 -4.59 322.57 -4.59 139.18 110 0.00 27.55 -4.00 326.82 -4.00 140.95 115 0.00 26.80 -3.70 329.00 -3.70 141.87 120 0.00 26.90 -3.74 328.71 -3.74 141.75 125 0.23 27.62 -4.03 322.04 -4.03 137.77 130 0.00 29.55 -4.76 321.37 -4.76 138.68 135 0.00 31.89 -5.59 315.48 -5.59 136.28 140 0.00 34.75 -6.52 308.35 -6.52 133.69 145 0.00 37.97 -7.49 301.77 -7.49 132.34 150 0.00 41.08 -8.34 296.05 -8.34 130.05 155 0.00 43.90 -9.06 291.32 -9.06 128.14 160 0.41 46.03 -9.58 262.17 -9.58 109.65 165 0.52 47.94 -10.00 248.16 -10.00 100.61 170 0.34 49.60 -10.00 268.46 -10.00 114.56 175 0.24 50.63 -10.00 280.17 -10.00 122.33 180 0.00 51.18 -10.00 285.28 -10.00 125.65 185 0.23 50.64 -10.00 281.52 -10.00 123.21 Frequency Coordination and Interference Analysis Report 04/26/2011 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 ATLANTA, GA Licensee Name Americom Government Services, Inc. Latitude (NAD 83) 33° 22' 46.9" N Longitude (NAD 83) 84° 17' 41.6" W Ground Elevation (AMSL) 269.9 m / 885.5 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Prodelin 3.8 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 -16.7 (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 0.26 49.68 -10.00 278.00 -10.00 120.91 195 0.28 48.15 -10.00 275.46 -10.00 119.23 200 0.32 46.10 -9.59 272.97 -9.59 116.96 205 0.00 43.90 -9.06 291.31 -9.06 128.13 210 0.00 41.08 -8.34 296.05 -8.34 130.05 215 0.00 37.97 -7.49 301.77 -7.49 132.34 220 0.31 34.43 -6.42 295.04 -6.42 126.33 225 0.31 30.90 -5.25 303.11 -5.25 129.50 230 0.31 27.42 -3.95 312.95 -3.95 133.04 235 0.67 24.13 -2.56 285.78 -2.56 113.41 240 0.67 21.78 -1.45 293.67 -1.45 116.47 245 0.67 20.37 -0.72 299.00 -0.72 118.54 250 0.75 20.00 -0.53 294.75 -0.53 115.40 255 0.75 20.89 -1.00 291.27 -1.00 114.04 260 0.79 22.78 -1.94 281.77 -1.94 109.55 265 1.00 25.36 -3.11 260.58 -3.11 100.00 270 1.00 28.70 -4.45 251.97 -4.45 100.00 275 0.92 32.48 -5.79 248.52 -5.79 100.00 280 0.84 36.52 -7.06 245.81 -7.06 100.00 285 0.51 40.84 -8.28 259.41 -8.28 105.70 290 0.51 45.15 -9.37 252.86 -9.37 102.87 295 0.51 49.57 -10.00 249.04 -10.00 101.24 300 0.00 54.19 -10.00 285.28 -10.00 125.65 305 0.00 58.72 -10.00 285.28 -10.00 125.65 310 0.00 63.29 -10.00 285.28 -10.00 125.65 315 0.00 67.90 -10.00 285.28 -10.00 125.65 320 0.00 72.53 -10.00 285.28 -10.00 125.65 325 0.00 77.18 -10.00 285.28 -10.00 125.65 330 0.00 81.85 -10.00 285.28 -10.00 125.65 335 0.00 86.52 -10.00 285.28 -10.00 125.65 340 0.00 91.20 -10.00 285.28 -10.00 125.65 345 0.00 95.87 -10.00 285.28 -10.00 125.65 350 0.00 100.54 -10.00 285.28 -10.00 125.65 355 0.00 105.20 -10.00 285.28 -10.00 125.65 Frequency Coordination and Interference Analysis Report 04/26/2011 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: April 26, 2011 Frequency Coordination and Interference Analysis Report 04/26/2011 Page 10 of 10


Document Created: 2011-04-26 14:18:40
Document Modified: 2011-04-26 14:18:40
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