Attachment Exhibit A

This document pretains to SES-MOD-20130128-00095 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2013012800095_982545

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for PROACTIVE COMMUNICATIONS, INC. KILLEEN, TEXAS Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 January 21, 2013

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 01/21/2013 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 01/21/2013 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 Alltel Communications, LLC – Central Texas Lower Colorado River Authority New Cingular Wireless PCS LLC – N. Texas T-Mobile USA, Inc. Westar Satellite Services LP No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 01/21/2013 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 December 5, 2012. Company AirCanopy Internet Services, Inc. Alltel Communications Investments, Inc Alltel Communications LLC - Central TX Alltel Communications of Texas, LP Austin Energy Austin, City of BLANCO, COUNTY OF BURNET COUNTY, OFFICE OF EMERGENCY MGMT Bastrop County, Office of Emergency Mgmt Brazos Electric Power Cooperative Inc COMANCHE COUNTY ELECTRIC COOPERATIVE Central Telephone Company of Texas Cingular Wireless of Texas RSA #16 LP Dallas MTA, L.P. GTE Mobilnet of Texas RSA #17 LTD Prtnsh HARRIS METHODIST HEALTH SERVICES Hilco Electric Coop LLANO, COUNTY OF Lower Colorado River Authority New Cingular Wireless PCS LLC - N Texas New Cingular Wireless PCS LLC - S Texas Pedernales Electric Cooperative Inc RAYTHEON COMPANY San Antonio MTA, L.P. T-MOBILE USA, INC. T-Mobile License LLC Totelcom Communications, LLC Verizon Wireless (VAW) LLC-Central Texas Verizon Wireless Texas LLC - Houston GC Verizon Wireless(VAW) LLC-AZ/CO/NM/NV/UT West Central Wireless Westar Satellite Services LP Frequency Coordination and Interference Analysis Report 01/21/2013 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 01/21/2013 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 01/21/2013 Job Number: 121205COMSJC02 Administrative Information Status ENGINEER PROPOSAL Call Sign E060406 Licensee Code PROACT Licensee Name PROACTIVE COMMUNICATIONS, INC. Site Information KILLEEN, TEXAS Venue Name Latitude (NAD 83) 31° 4' 30.5" N Longitude (NAD 83) 97° 42' 39.8" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 263.65 m / 865.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 58° W to 139° West Longitude Azimuth Range 121.9° to 239.6° Corresponding Elevation Angles 34.0° / 32.8° Antenna Centerline (AGL) 1.8 m / 5.9 ft Antenna Information Receive Transmit Manufacturer Channel Master Channel Master Model WR137 WR137 Gain / Diameter 38.0 dBi / 2.4 m 42.2 dBi / 2.4 m 3-dB / 15-dB Beamwidth 2.10° / 4.20° 1.30° / 2.60° Max Available RF Power (dBW/4 kHz) -10.1 (dBW/MHz) 13.9 Maximum EIRP (dBW/4 kHz) 32.1 (dBW/MHz) 56.1 (dBW) 55.2 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) 819KG7W / 3700.0 - 4200.0 819KG7W / 5925.0 - 5958.5 819KG7W / 5991.0 - 6018.0 819KG7W / 6080.0 - 6425.0 Max Great Circle Coordination Distance 298.7 km / 185.6 mi 146.5 km / 91.0 mi Precipitation Scatter Contour Radius 487.2 km / 302.7 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 01/21/2013 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 KILLEEN, TX Licensee Name PROACTIVE COMMUNICATIONS, INC. Latitude (NAD 83) 31° 4' 30.5" N Longitude (NAD 83) 97° 42' 39.8" W Ground Elevation (AMSL) 263.65 m / 865.0 ft Antenna Centerline (AGL) 1.8 m / 5.9 ft Antenna Model Channel Master WR137 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 -10.1 (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 0.00 115.23 -10.00 285.28 -10.00 142.81 5 0.00 112.00 -10.00 285.28 -10.00 142.81 10 0.00 107.98 -10.00 285.28 -10.00 142.81 15 0.00 103.91 -10.00 285.28 -10.00 142.81 20 0.00 99.81 -10.00 285.28 -10.00 142.81 25 0.00 95.68 -10.00 285.28 -10.00 142.81 30 0.00 91.54 -10.00 285.28 -10.00 142.81 35 0.00 87.40 -10.00 285.28 -10.00 142.81 40 0.00 83.26 -10.00 285.28 -10.00 142.81 45 0.00 79.14 -10.00 285.28 -10.00 142.81 50 0.00 75.05 -10.00 285.28 -10.00 142.81 55 0.00 70.99 -10.00 285.28 -10.00 142.81 60 0.00 66.99 -10.00 285.28 -10.00 142.81 65 0.00 63.06 -10.00 285.28 -10.00 142.81 70 0.25 59.11 -10.00 278.76 -10.00 138.09 75 0.32 55.33 -10.00 270.70 -10.00 133.76 80 0.33 51.70 -10.00 269.00 -10.00 132.60 85 0.33 48.26 -10.00 269.12 -10.00 132.68 90 0.33 45.03 -9.34 273.59 -9.34 133.51 95 0.27 42.12 -8.61 285.71 -8.61 140.90 100 0.23 39.52 -7.92 294.32 -7.92 146.09 105 0.43 37.13 -7.24 274.25 -7.24 132.09 110 0.57 35.26 -6.68 265.53 -6.68 125.28 115 0.68 33.96 -6.27 260.81 -6.27 121.37 120 0.80 33.26 -6.05 254.36 -6.05 116.47 125 0.93 33.21 -6.03 246.05 -6.03 110.53 130 1.07 33.82 -6.23 238.26 -6.23 105.02 135 1.19 35.08 -6.63 232.00 -6.63 100.81 140 1.27 36.93 -7.19 226.27 -7.19 100.00 145 1.27 39.34 -7.87 222.76 -7.87 100.00 150 1.33 42.08 -8.60 217.13 -8.60 100.00 155 1.33 45.00 -9.33 213.54 -9.33 100.00 160 1.33 47.55 -9.93 210.68 -9.93 100.00 165 1.32 49.66 -10.00 210.71 -10.00 100.00 170 1.40 51.14 -10.00 208.40 -10.00 100.00 175 1.44 52.05 -10.00 207.28 -10.00 100.00 180 1.44 52.36 -10.00 207.28 -10.00 100.00 185 1.31 52.17 -10.00 210.94 -10.00 100.00 Frequency Coordination and Interference Analysis Report 01/21/2013 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 KILLEEN, TX Licensee Name PROACTIVE COMMUNICATIONS, INC. Latitude (NAD 83) 31° 4' 30.5" N Longitude (NAD 83) 97° 42' 39.8" W Ground Elevation (AMSL) 263.65 m / 865.0 ft Antenna Centerline (AGL) 1.8 m / 5.9 ft Antenna Model Channel Master WR137 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 -10.1 (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 1.30 51.23 -10.00 211.18 -10.00 100.00 195 1.22 49.74 -10.00 213.43 -10.00 100.00 200 1.23 47.64 -9.95 213.67 -9.95 100.00 205 1.10 45.16 -9.37 220.25 -9.37 100.00 210 1.10 42.23 -8.64 224.14 -8.64 100.00 215 0.96 39.37 -7.88 233.92 -7.88 104.15 220 0.94 36.80 -7.15 239.25 -7.15 107.14 225 0.80 34.78 -6.53 251.12 -6.53 114.89 230 0.68 33.32 -6.07 262.10 -6.07 121.97 235 0.63 32.41 -5.77 267.27 -5.77 125.09 240 0.45 32.30 -5.73 282.22 -5.73 133.88 245 0.34 32.81 -5.90 293.98 -5.90 142.37 250 0.29 33.93 -6.26 298.75 -6.26 146.51 255 0.34 35.53 -6.77 288.19 -6.77 139.67 260 0.35 37.71 -7.41 282.65 -7.41 136.80 265 0.37 40.31 -8.13 275.68 -8.13 133.13 270 0.58 43.14 -8.87 251.18 -8.87 118.43 275 0.43 46.49 -9.69 259.62 -9.69 125.66 280 0.43 49.98 -10.00 257.26 -10.00 124.45 285 0.45 53.63 -10.00 255.20 -10.00 123.00 290 0.35 57.48 -10.00 266.62 -10.00 130.97 295 0.35 61.39 -10.00 267.42 -10.00 131.52 300 0.31 65.40 -10.00 271.60 -10.00 133.12 305 0.26 69.48 -10.00 278.13 -10.00 137.64 310 0.27 73.60 -10.00 276.20 -10.00 136.29 315 0.22 77.77 -10.00 282.45 -10.00 140.74 320 0.00 81.98 -10.00 285.28 -10.00 142.81 325 0.00 86.17 -10.00 285.28 -10.00 142.81 330 0.00 90.38 -10.00 285.28 -10.00 142.81 335 0.00 94.58 -10.00 285.28 -10.00 142.81 340 0.00 98.77 -10.00 285.28 -10.00 142.81 345 0.00 102.95 -10.00 285.28 -10.00 142.81 350 0.00 107.09 -10.00 285.28 -10.00 142.81 355 0.00 111.18 -10.00 285.28 -10.00 142.81 Frequency Coordination and Interference Analysis Report 01/21/2013 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: January 21, 2013 Frequency Coordination and Interference Analysis Report 01/21/2013 Page 10 of 10


Document Created: 2013-01-24 15:53:52
Document Modified: 2013-01-24 15:53:52
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