Attachment Exhibit A

This document pretains to SES-MOD-20140724-00617 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2014072400617_1054569

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Brigham Young University Rexburg, Idaho (Call Sign: E130184) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 July 18, 2014

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 07/18/2014 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 07/18/2014 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 transmit-receive earth station. Further, the transmit spectrum will be limited to frequencies 5925.0 to 6107.0 MHz and 6140.0 MHz to 6425.0 MHz. Company Idaho 6 Clark Limited Partnership Teton Communications WWC License LLC – Mountain Region No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 07/18/2014 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 25, 2014. Company AT&T COMMUNICATIONS OF MOUNTAIN STATES Cellular, Inc. Financial Corporation Digis LLC Fremont Telcom Co Idaho 6 Clark Limited Partnership LP Broadband, Inc. New Cingular Wireless PCS-ID & WY Mkts PacifiCorp Qwest Corporation Riverbend Communications, LLC State of Idaho State of Montana TETON COMMUNICATIONS Union Telephone Company, Inc. Verizon Wireless (VAW) LLC -CO/ID/MT/WY WWC License LLC-Mountain Region Frequency Coordination and Interference Analysis Report 07/18/2014 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 07/18/2014 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 07/18/2014 Job Number: 140625COMSJC03 Administrative Information Status ENGINEER PROPOSAL Call Sign E130184 Licensee Code BYUBRD Licensee Name Brigham Young University Site Information REXBURG, IDAHO Venue Name Latitude (NAD 83) 43° 49' 0.3" N Longitude (NAD 83) 111° 46' 42.4" W Climate Zone A Rain Zone 5 Ground Elevation (AMSL) 1524.61 m / 5002.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 90° W to 92° West Longitude Azimuth Range 150.0° to 152.6° Corresponding Elevation Angles 35.0° / 35.7° Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Information Receive Transmit Manufacturer ASC Signal ASC Signal Model 4.5 Meter 4.5 Meter Gain / Diameter 43.8 dBi / 4.5 m 46.6 dBi / 4.5 m 3-dB / 15-dB Beamwidth 1.10° / 2.10° 0.80° / 1.50° 5M06G7W - 30M0G7W Max Available RF Power (dBW/4 kHz) -16.3 -16.3 (dBW/MHz) 7.7 7.7 Maximum EIRP (dBW/4 kHz) 30.3 30.3 (dBW/MHz) 54.3 54.3 (dBW) 61.3 69.05 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) 5M06G7W - 30M0G7W / 3700.0 - 4200.0 5M06G7W - 30M0G7W / 5925.0 - 6107.0 5M06G7W - 30M0G7W / 6140.0 - 6425.0 Max Great Circle Coordination Distance 285.3 km / 177.2 mi 126.7 km / 78.7 mi Precipitation Scatter Contour Radius 384.6 km / 239.0 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 07/18/2014 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 REXBURG, ID Licensee Name Brigham Young University Latitude (NAD 83) 43° 49' 0.3" N Longitude (NAD 83) 111° 46' 42.4" W Ground Elevation (AMSL) 1524.61 m / 5002.0 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model ASC Signal 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 -16.3 (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 0.00 135.23 -10.00 285.28 -10.00 126.71 5 0.00 132.19 -10.00 285.28 -10.00 126.71 10 0.00 128.90 -10.00 285.28 -10.00 126.71 15 0.00 125.43 -10.00 285.28 -10.00 126.71 20 0.00 121.80 -10.00 285.28 -10.00 126.71 25 0.00 118.05 -10.00 285.28 -10.00 126.71 30 0.00 114.20 -10.00 285.28 -10.00 126.71 35 0.00 110.28 -10.00 285.28 -10.00 126.71 40 0.00 106.29 -10.00 285.28 -10.00 126.71 45 0.00 102.26 -10.00 285.28 -10.00 126.71 50 0.00 98.19 -10.00 285.28 -10.00 126.71 55 0.00 94.11 -10.00 285.28 -10.00 126.71 60 0.00 90.01 -10.00 285.28 -10.00 126.71 65 0.47 85.89 -10.00 252.83 -10.00 104.86 70 0.74 81.76 -10.00 234.93 -10.00 100.00 75 1.06 77.61 -10.00 218.50 -10.00 100.00 80 1.29 73.47 -10.00 211.44 -10.00 100.00 85 1.67 69.32 -10.00 203.39 -10.00 100.00 90 1.90 65.24 -10.00 197.35 -10.00 100.00 95 2.16 61.18 -10.00 190.87 -10.00 100.00 100 2.42 57.20 -10.00 184.88 -10.00 100.00 105 2.69 53.29 -10.00 178.70 -10.00 100.00 110 2.87 49.54 -10.00 174.38 -10.00 100.00 115 3.08 45.93 -9.55 171.83 -9.55 100.00 120 3.28 42.53 -8.72 171.59 -8.72 100.00 125 3.31 39.51 -7.92 174.94 -7.92 100.00 130 3.41 36.80 -7.15 176.82 -7.15 100.00 135 3.44 34.57 -6.47 179.65 -6.47 100.00 140 3.37 32.97 -5.95 183.79 -5.95 100.00 145 3.18 32.12 -5.67 189.32 -5.67 100.00 150 2.90 32.05 -5.65 195.47 -5.65 100.00 155 2.62 32.67 -5.85 200.40 -5.85 100.00 160 2.50 33.79 -6.22 201.32 -6.22 100.00 165 2.48 35.23 -6.67 199.60 -6.67 100.00 170 2.24 37.27 -7.28 201.80 -7.28 100.00 175 2.07 39.70 -7.97 202.44 -7.97 100.00 180 1.87 42.52 -8.71 203.95 -8.71 100.00 Frequency Coordination and Interference Analysis Report 07/18/2014 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 REXBURG, ID Licensee Name Brigham Young University Latitude (NAD 83) 43° 49' 0.3" N Longitude (NAD 83) 111° 46' 42.4" W Ground Elevation (AMSL) 1524.61 m / 5002.0 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model ASC Signal 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 -16.3 (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 1.62 45.66 -9.49 204.72 -9.49 100.00 190 1.48 48.97 -10.00 206.16 -10.00 100.00 195 1.22 52.54 -10.00 213.44 -10.00 100.00 200 0.91 56.27 -10.00 225.17 -10.00 100.00 205 0.64 60.07 -10.00 240.73 -10.00 100.00 210 0.46 63.93 -10.00 254.80 -10.00 106.24 215 0.24 67.87 -10.00 280.31 -10.00 123.47 220 0.00 71.85 -10.00 285.28 -10.00 126.71 225 0.00 75.82 -10.00 285.28 -10.00 126.71 230 0.00 79.83 -10.00 285.28 -10.00 126.71 235 0.00 83.87 -10.00 285.28 -10.00 126.71 240 0.00 87.92 -10.00 285.28 -10.00 126.71 245 0.00 91.98 -10.00 285.28 -10.00 126.71 250 0.00 96.04 -10.00 285.28 -10.00 126.71 255 0.00 100.08 -10.00 285.28 -10.00 126.71 260 0.00 104.09 -10.00 285.28 -10.00 126.71 265 0.00 108.06 -10.00 285.28 -10.00 126.71 270 0.00 111.98 -10.00 285.28 -10.00 126.71 275 0.00 115.82 -10.00 285.28 -10.00 126.71 280 0.00 119.58 -10.00 285.28 -10.00 126.71 285 0.00 123.23 -10.00 285.28 -10.00 126.71 290 0.00 126.73 -10.00 285.28 -10.00 126.71 295 0.00 130.07 -10.00 285.28 -10.00 126.71 300 0.00 133.19 -10.00 285.28 -10.00 126.71 305 0.00 136.04 -10.00 285.28 -10.00 126.71 310 0.00 138.58 -10.00 285.28 -10.00 126.71 315 0.00 140.73 -10.00 285.28 -10.00 126.71 320 0.00 142.42 -10.00 285.28 -10.00 126.71 325 0.00 143.60 -10.00 285.28 -10.00 126.71 330 0.00 144.21 -10.00 285.28 -10.00 126.71 335 0.00 144.22 -10.00 285.28 -10.00 126.71 340 0.00 143.62 -10.00 285.28 -10.00 126.71 345 0.00 142.35 -10.00 285.28 -10.00 126.71 350 0.00 140.38 -10.00 285.28 -10.00 126.71 355 0.00 137.98 -10.00 285.28 -10.00 126.71 Frequency Coordination and Interference Analysis Report 07/18/2014 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: July 18, 2014 Frequency Coordination and Interference Analysis Report 07/18/2014 Page 10 of 10


Document Created: 2014-07-21 14:06:49
Document Modified: 2014-07-21 14:06:49
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