Attachment Final Coordination

This document pretains to SES-STA-20160804-00718 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2016080400718_1145185

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Iridium Constellation LLC FAIRBANKS, AK (E050282) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 July 28, 2016

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 07/28/2016 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 07/28/2016 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 Alaska Wireless Network, LLC No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 07/28/2016 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 06/23/2016. Company ACS of Anchorage License Sub, Inc. AT&T Mobility Spectrum LLC - AK Ace Tekk AlasConnect, Inc. Alaska Wireless Network, LLC FAIRBANKS NORTH STAR BOROUGH FAIRBANKS POLICE DEPARTMENT GCI Communications Corp. State of Alaska Frequency Coordination and Interference Analysis Report 07/28/2016 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 07/28/2016 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 07/28/2016 Job Number: 160623COMSGE03 Administrative Information Status ENGINEER PROPOSAL Call Sign E050282 Licensee Code IRICON Licensee Name Iridium Constellation LLC Site Information FAIRBANKS, AK Venue Name Latitude (NAD 83) 64° 49' 3.2" N Longitude (NAD 83) 147° 43' 26.8" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 128.02 m / 420.0 ft Link Information Satellite Type Low Earth Orbit Mode TR - Transmit-Receive Modulation Digital Minimum Elevation Angle 5.0° Azimuth Range 0.0° to 360° Antenna Centerline (AGL) 6.1 m / 20.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Scientific-Atlanta Scientific-Atlanta Model 3.0 meter 3.0 meter Gain / Diameter 54.0 dBi / 3.0 m 57.4 dBi / 3.0 m 3-dB / 15-dB Beamwidth 0.40° / 0.70° 0.24° / 0.45° Max Available RF Power (dBW/4 kHz) (1) -12.3 (2) -23.7 (dBW/MHz) 11.7 0.3 Maximum EIRP (dBW/4 kHz) 45.1 33.7 (dBW/MHz) 69.1 57.7 Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -150.2 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Frequency Information Receive 18.0 GHz Transmit 28.0 GHz Emission / Frequency Range (MHz) 200KF9D / 19400.2 - 19405.0 (1) 1M00F9D / 29102.0 14M0G7W / 19400.0 -19600.0 (1) 1M00F9D / 29298.0 (2) 14M0G7W / 29100.0 – 29300.0 Max Great Circle Coordination Distance 226.0 km / 140.4 mi 100.0 km / 62.1 mi Precipitation Scatter Contour Radius 120.8 km / 75.1 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 07/28/2016 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 FAIRBANKS, AK Licensee Name Iridium Constellation LLC Latitude (NAD 83) 64° 49' 3.2" N Longitude (NAD 83) 147° 43' 26.8" W Ground Elevation (AMSL) 128.02 m / 420.0 ft Antenna Centerline (AGL) 6.1 m / 20.0 ft Antenna Model Scientific-Atlanta 3 meter Antenna Mode Receive 18.0 GHz Transmit 28.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -150.2 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Max Available RF Power -23.7 (dBW/4 kHz) Receive 18.0 GHz Transmit 28.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 0.36 44.22 2.60 226.00 11.50 100.00 5 0.36 40.75 2.60 226.00 11.50 100.00 10 0.36 37.56 2.60 226.00 11.50 100.00 15 0.36 34.74 2.60 226.00 11.50 100.00 20 0.36 32.37 2.60 226.00 11.50 100.00 25 0.44 30.65 2.60 226.00 11.50 100.00 30 1.12 30.20 2.60 226.00 11.50 100.00 35 1.62 30.33 2.60 226.00 11.50 100.00 40 1.28 30.38 2.60 226.00 11.50 100.00 45 0.96 31.19 2.60 226.00 11.50 100.00 50 0.44 32.52 2.60 226.00 11.50 100.00 55 0.36 34.83 2.60 226.00 11.50 100.00 60 0.36 37.66 2.60 226.00 11.50 100.00 65 0.36 40.86 2.60 226.00 11.50 100.00 70 0.36 44.34 2.60 226.00 11.50 100.00 75 0.36 48.03 2.60 226.00 11.50 100.00 80 0.36 51.89 2.60 226.00 11.50 100.00 85 0.36 55.89 2.60 226.00 11.50 100.00 90 0.36 59.98 2.60 226.00 11.50 100.00 95 0.36 64.16 2.60 226.00 11.50 100.00 100 0.36 68.39 2.60 226.00 11.50 100.00 105 0.36 72.68 2.60 226.00 11.50 100.00 110 0.36 77.00 2.60 226.00 11.50 100.00 115 0.36 81.34 2.60 226.00 11.50 100.00 120 0.36 85.71 2.60 226.00 11.50 100.00 125 0.36 90.07 2.60 226.00 11.50 100.00 130 0.36 94.44 2.60 226.00 11.50 100.00 135 0.36 98.80 2.60 226.00 11.50 100.00 140 0.36 103.15 2.60 226.00 11.50 100.00 145 0.36 107.47 2.60 226.00 11.50 100.00 150 0.36 111.75 2.60 226.00 11.50 100.00 155 0.36 115.99 2.60 226.00 11.50 100.00 160 0.36 120.16 2.60 226.00 11.50 100.00 165 0.36 124.25 2.60 226.00 11.50 100.00 170 0.36 128.24 2.60 226.00 11.50 100.00 175 0.36 132.10 2.60 226.00 11.50 100.00 180 0.36 135.78 2.60 226.00 11.50 100.00 185 0.36 139.25 2.60 226.00 11.50 100.00 Frequency Coordination and Interference Analysis Report 07/28/2016 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 FAIRBANKS, AK Licensee Name Iridium Constellation LLC Latitude (NAD 83) 64° 49' 3.2" N Longitude (NAD 83) 147° 43' 26.8" W Ground Elevation (AMSL) 128.02 m / 420.0 ft Antenna Centerline (AGL) 6.1 m / 20.0 ft Antenna Model Scientific-Atlanta 3 meter Antenna Mode Receive 18.0 GHz Transmit 28.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -150.2 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Max Available RF Power -23.7 (dBW/4 kHz) Receive 18.0 GHz Transmit 28.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.36 142.44 2.60 226.00 11.50 100.00 195 0.36 145.26 2.60 226.00 11.50 100.00 200 0.36 147.63 2.60 226.00 11.50 100.00 205 0.36 149.43 2.60 226.00 11.50 100.00 210 0.36 150.56 2.60 226.00 11.50 100.00 215 0.36 150.93 2.60 226.00 11.50 100.00 220 0.36 150.53 2.60 226.00 11.50 100.00 225 0.36 149.38 2.60 226.00 11.50 100.00 230 0.36 147.56 2.60 226.00 11.50 100.00 235 0.36 145.17 2.60 226.00 11.50 100.00 240 0.36 142.34 2.60 226.00 11.50 100.00 245 0.36 139.14 2.60 226.00 11.50 100.00 250 0.36 135.66 2.60 226.00 11.50 100.00 255 0.36 131.97 2.60 226.00 11.50 100.00 260 0.36 128.11 2.60 226.00 11.50 100.00 265 0.36 124.11 2.60 226.00 11.50 100.00 270 0.36 120.02 2.60 226.00 11.50 100.00 275 0.36 115.84 2.60 226.00 11.50 100.00 280 0.36 111.61 2.60 226.00 11.50 100.00 285 0.36 107.32 2.60 226.00 11.50 100.00 290 0.36 103.00 2.60 226.00 11.50 100.00 295 0.36 98.66 2.60 226.00 11.50 100.00 300 0.36 94.29 2.60 226.00 11.50 100.00 305 0.36 89.93 2.60 226.00 11.50 100.00 310 0.41 85.56 2.60 226.00 11.50 100.00 315 0.36 81.20 2.60 226.00 11.50 100.00 320 0.36 76.85 2.60 226.00 11.50 100.00 325 0.36 72.53 2.60 226.00 11.50 100.00 330 0.36 68.25 2.60 226.00 11.50 100.00 335 0.36 64.01 2.60 226.00 11.50 100.00 340 0.36 59.84 2.60 226.00 11.50 100.00 345 0.36 55.75 2.60 226.00 11.50 100.00 350 0.36 51.76 2.60 226.00 11.50 100.00 355 0.36 47.90 2.60 226.00 11.50 100.00 Frequency Coordination and Interference Analysis Report 07/28/2016 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: July 28, 2016 Frequency Coordination and Interference Analysis Report 07/28/2016 Page 10 of 10


Document Created: 2016-07-28 09:41:34
Document Modified: 2016-07-28 09:41:34
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