Attachment FCC_OkCityRpt.pdf

This document pretains to SES-DBE-20120820-00763 for Database Entry on a Satellite Earth Station filing.

IBFS_SESDBE2012082000763_962808

Exhibit A FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY, OKLAHOMA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 August 10, 2012

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 08/10/2012 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, based upon the restrictions noted in the Summary of Results (Section 2). Frequency Coordination and Interference Analysis Report 08/10/2012 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 most cases. 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 and frequency separation are considered on the interfering paths, sufficient losses exist to negate harmful interference from occurring with the proposed transmit-receive earth station. Further, the transmit spectrum will be limited from 5925.0 to 6359.0 MHz and 6391.5 to 6425.0 MHz. Company Alltel Communications LLC – Oklahoma New Cingular Wireless PCS, LLC - OK Oklahoma Department of Transportation Oklahoma Gas and Electric Company Oklahoma RSA 3 Limited Partnership Oklahoma RSA 9 Limited Partnership Western Farmers Electric Cooperative No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 08/10/2012 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 June 28, 2012. Company AMERICAN ELECTRIC POWER SERVICE CORP. Alltel Communications LLC - Oklahoma BNSF Railway Company CHOICE WIRELESS LC Cellular Network Partnership, A Ltd Prtn Conterra Ultra Broadband, LLC ENBRIDGE ENERGY COMPANY, INC. GRAND RIVER DAM AUTHORITY KAMO Electric Cooperative Inc. New Cingular Wireless PCS LLC - N Texas New Cingular Wireless PCS LLC - S Texas New Cingular Wireless PCS, LLC - OK Oklahoma City SMSA Limited Partnership Oklahoma Department of Transportation Oklahoma Gas and Electric Company Oklahoma Independent RSA 7 Partnership Oklahoma RSA 3 Limited Partnership Oklahoma RSA 9 Limited Partnership PUBLIC SERVICE COMPANY OF OKLAHOMA Pioneer Long Distance Inc. RAYTHEON COMPANY Redlands Community College Texahoma Cellular Limited Partnership US Cellular Telephone of Greater Tulsa USCOC of Greater Oklahoma, LLC USCOC of Oklahoma RSA #10, Inc. Verizon Wireless (VAW) LLC (KS,MO,MN,OK) WILSON PUBLIC SCHOOLS WWC License L.L.C.- Oklahoma WWC Texas RSA Limited Partnership Western Farmers Electric Cooperative Frequency Coordination and Interference Analysis Report 08/10/2012 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 08/10/2012 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 08/10/2012 Job Number: 120628COMSJC05 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code FEDFAA Licensee Name FEDERAL AVIATION ADMINISTRATION Site Information OKLAHOMA CITY, OKLAHOMA Venue Name Latitude (NAD 83) 35° 23' 42.0" N Longitude (NAD 83) 97° 37' 23.0" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 389.23 m / 1277.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 72° W to 139° West Longitude Azimuth Range 140.4° to 236.7° Corresponding Elevation Angles 40.7° / 30.2° Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Information Receive Transmit Manufacturer Superior Satellite Superior Satellite Model 4.5 Meter 4.5 Meter Gain / Diameter 43.6 dBi / 4.5 m 46.7 dBi / 4.5 m 3-dB / 15-dB Beamwidth 1.10° / 1.90° 0.76° / 1.43° Max Available RF Power (dBW/4 kHz) -2.7 (dBW/MHz) 10.8 Maximum EIRP (dBW/4 kHz) 44.0 (dBW/MHz) 57.5 (dBW) 57.5 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) 90K0G7W / 3700.0 - 4200.0 90K0G7W / 5925.0 - 6359.0 90K0G7W / 6391.5 - 6425.0 Max Great Circle Coordination Distance 318.2 km / 197.7 mi 189.1 km / 117.5 mi Precipitation Scatter Contour Radius 489.0 km / 303.8 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 08/10/2012 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 OKLAHOMA CITY, OK Licensee Name FEDERAL AVIATION ADMINISTRATION Latitude (NAD 83) 35° 23' 42.0" N Longitude (NAD 83) 97° 37' 23.0" W Ground Elevation (AMSL) 389.23 m / 1277.0 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model Superior Satellite 4.5 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 -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 0.00 118.35 -10.00 285.28 -10.00 170.66 5 0.00 122.41 -10.00 285.28 -10.00 170.66 10 0.00 119.40 -10.00 285.28 -10.00 170.66 15 0.00 116.02 -10.00 285.28 -10.00 170.66 20 0.00 112.53 -10.00 285.28 -10.00 170.66 25 0.00 108.95 -10.00 285.28 -10.00 170.66 30 0.00 105.30 -10.00 285.28 -10.00 170.66 35 0.00 101.59 -10.00 285.28 -10.00 170.66 40 0.00 97.84 -10.00 285.28 -10.00 170.66 45 0.00 94.07 -10.00 285.28 -10.00 170.66 50 0.00 90.28 -10.00 285.28 -10.00 170.66 55 0.00 86.50 -10.00 285.28 -10.00 170.66 60 0.00 82.72 -10.00 285.28 -10.00 170.66 65 0.00 78.97 -10.00 285.28 -10.00 170.66 70 0.00 75.26 -10.00 285.28 -10.00 170.66 75 0.00 71.59 -10.00 285.28 -10.00 170.66 80 0.00 68.00 -10.00 285.28 -10.00 170.66 85 0.00 64.50 -10.00 285.28 -10.00 170.66 90 0.00 61.10 -10.00 285.28 -10.00 170.66 95 0.00 57.84 -10.00 285.28 -10.00 170.66 100 0.00 54.74 -10.00 285.28 -10.00 170.66 105 0.00 51.84 -10.00 285.28 -10.00 170.66 110 0.00 49.17 -10.00 285.28 -10.00 170.66 115 0.00 46.79 -9.75 286.85 -9.75 171.62 120 0.00 44.73 -9.27 289.99 -9.27 173.51 125 0.00 43.06 -8.85 292.69 -8.85 175.12 130 0.00 41.80 -8.53 294.80 -8.53 176.37 135 0.00 41.02 -8.32 296.16 -8.32 177.16 140 0.00 40.73 -8.25 296.67 -8.25 177.46 145 0.00 40.94 -8.30 296.29 -8.30 177.24 150 0.00 41.66 -8.49 295.05 -8.49 176.52 155 0.00 42.84 -8.80 293.05 -8.80 175.34 160 0.00 44.46 -9.20 290.43 -9.20 173.77 165 0.00 46.30 -9.64 287.58 -9.64 172.06 170 0.00 47.72 -9.97 285.48 -9.97 170.78 175 0.00 48.60 -10.00 285.28 -10.00 170.66 180 0.00 48.90 -10.00 285.28 -10.00 170.66 Frequency Coordination and Interference Analysis Report 08/10/2012 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 OKLAHOMA CITY, OK Licensee Name FEDERAL AVIATION ADMINISTRATION Latitude (NAD 83) 35° 23' 42.0" N Longitude (NAD 83) 97° 37' 23.0" W Ground Elevation (AMSL) 389.23 m / 1277.0 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model Superior Satellite 4.5 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 -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) 185 0.00 48.60 -10.00 285.28 -10.00 170.66 190 0.00 47.72 -9.97 285.48 -9.97 170.78 195 0.00 46.30 -9.64 287.58 -9.64 172.06 200 0.00 44.40 -9.18 290.52 -9.18 173.83 205 0.00 42.08 -8.60 294.34 -8.60 176.09 210 0.00 39.40 -7.89 299.07 -7.89 178.86 215 0.00 36.57 -7.08 304.55 -7.08 181.99 220 0.00 34.11 -6.32 309.75 -6.32 184.90 225 0.00 32.18 -5.69 314.80 -5.69 187.34 230 0.20 30.67 -5.17 318.21 -5.17 189.13 235 0.25 30.00 -4.93 313.71 -4.93 185.21 240 0.26 30.11 -4.97 311.75 -4.97 184.22 245 0.35 30.89 -5.25 298.29 -5.25 173.74 250 0.41 32.38 -5.76 286.61 -5.76 163.02 255 0.44 34.51 -6.45 278.40 -6.45 157.23 260 0.39 37.18 -7.26 279.41 -7.26 159.42 265 0.34 40.24 -8.12 279.52 -8.12 160.92 270 0.29 43.59 -8.99 280.28 -8.99 163.00 275 0.31 47.15 -9.84 272.13 -9.84 157.34 280 0.27 50.92 -10.00 276.64 -10.00 161.48 285 0.22 54.84 -10.00 282.58 -10.00 168.30 290 0.21 58.85 -10.00 284.52 -10.00 170.00 295 0.23 62.94 -10.00 281.09 -10.00 165.36 300 0.21 67.12 -10.00 283.66 -10.00 169.25 305 0.24 71.34 -10.00 280.53 -10.00 164.88 310 0.34 75.59 -10.00 267.80 -10.00 153.92 315 0.42 79.89 -10.00 258.96 -10.00 146.60 320 0.44 84.21 -10.00 256.22 -10.00 144.38 325 0.39 88.55 -10.00 262.32 -10.00 149.35 330 0.35 92.89 -10.00 266.72 -10.00 153.01 335 0.30 97.21 -10.00 273.03 -10.00 158.36 340 0.29 101.53 -10.00 274.01 -10.00 159.21 345 0.30 105.82 -10.00 273.03 -10.00 158.36 350 0.24 110.07 -10.00 279.64 -10.00 164.09 355 0.00 114.21 -10.00 285.28 -10.00 170.66 Frequency Coordination and Interference Analysis Report 08/10/2012 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 Engineer III, Telecommunications COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Va 20147 DATED: August 10, 2012 Frequency Coordination and Interference Analysis Report 08/10/2012 Page 10 of 10


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