Attachment Exhibit C

This document pretains to SES-LIC-20190320-00387 for License on a Satellite Earth Station filing.

IBFS_SESLIC2019032000387_1637921

Exhibit C FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Intelsat License LLC NAPA, CA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 March 13, 2019

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA .................................................................................................. 7 5. CERTIFICATION ......................................................................................................................................... 11 Frequency Coordination and Interference Analysis Report 03/13/2019 Page 2 of 11

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 03/13/2019 Page 3 of 11

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. Frequency Coordination and Interference Analysis Report 03/13/2019 Page 4 of 11

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 02/21/2019. Company AT&T Mobility Wireless Operations Hldgs Alameda County of California CBS Broadcasting Inc CBS Communications Services Inc California Rural Service Area #1, Inc. California State University, Sacramento California, State of Cify of Richmond California City & County of San Francisco PUC Contra Costa, County of County of San Mateo Crystal Smr Inc. East Bay Municipal Utility District East Bay Regional Park Field, David J Golden Gate Bridge Hwy & Trans Dist KGO Television, Inc. M.U.T. Licensing, LLC Marin, County of Mendocino County of Modesto Irrigation District Napa, City of Napa, County of New Cingular Wireless PCS LLC - N CAL Nextel of California Inc. Olympic Wireless, LLC Pacific Gas and Electric Company Pacific Satellite Connection, Inc. Sacramento County Sacramento Municipal Utility District Sacramento Valley Limited Partnership San Mateo County Transit Dist - PCJPB Santa Clara, County of Solano, County of Sonoma, County of CA Southern California Edison Company Telepath Corporation Transmission Agency of Northern Californ Tri-Dam Project Union Pacific Railroad Company Verizon Wireless (VAW) LLC-N CA/NV Frequency Coordination and Interference Analysis Report 03/13/2019 Page 5 of 11

Yolo Emergency Communications Agency Yuba County Water Agency Yuba, County of Frequency Coordination and Interference Analysis Report 03/13/2019 Page 6 of 11

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 03/13/2019 Page 7 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 03/13/2019 Job Number: 190221COMSGE05 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code INTELS Licensee Name Intelsat License LLC Site Information NAPA, CA Venue Name Latitude (NAD 83) 38° 14' 41.6" N Longitude (NAD 83) 122° 16' 45.8" W Climate Zone A Rain Zone 3 Ground Elevation (AMSL) 13.14 m / 43.1 ft Link Information Satellite Type Geostationary Mode TO - Transmit-Only Modulation Digital Satellite Arc 50° W to 194° West Longitude Azimuth Range 101.2° to 258.4° Corresponding Elevation Angles 5.2° / 5.6° Antenna Centerline (AGL) 7.32 m / 24.0 ft Antenna Information Transmit - FCC32 Manufacturer Vertex-RSI Model 11.1 MKX Gain / Diameter 55.5 dBi / 11.1 m 3-dB / 15-dB Beamwidth 0.28° / 0.59° Max Available RF Power (dBW/4 kHz) (1) -4.5 (2) -12.9 (dBW/MHz) 19.5 11.1 Maximum EIRP (dBW/4 kHz) 51.0 42.6 (dBW/MHz) 75.0 66.6 Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Frequency Information Transmit 6.7 GHz Emission / Frequency Range (MHz) 20M5G7D / 6598.58 - 6618.58 (1) 20M5G7D / 6649.73 - 6669.73 (2) Max Great Circle Coordination Distance 399.5 km / 248.2 mi Precipitation Scatter Contour Radius 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 03/13/2019 Page 8 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values NAPA, CA Licensee Name Intelsat License LLC Latitude (NAD 83) 38° 14' 41.6" N Longitude (NAD 83) 122° 16' 45.8" W Ground Elevation (AMSL) 13.14 m / 43.1 ft Antenna Centerline (AGL) 7.32 m / 24.0 ft Antenna Model Vertex 11.1 meter Antenna Mode Transmit 6.7 GHz Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Max Available RF Power -4.5/-12.9 (dBW/4 kHz) Transmit 6.7 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 0 0.00 101.15 -10.00 162.08 5 0.00 96.17 -10.00 162.08 10 0.77 91.19 -10.00 122.75 15 0.51 86.20 -10.00 133.30 20 0.43 81.22 -10.00 139.84 25 0.45 76.24 -10.00 138.24 30 1.37 71.23 -10.00 102.75 35 2.18 66.23 -10.00 100.00 40 2.10 61.24 -10.00 100.00 45 2.99 56.22 -10.00 100.00 50 2.74 51.23 -10.00 100.00 55 3.58 46.21 -9.62 100.00 60 3.75 41.21 -8.38 100.00 65 4.59 36.20 -6.97 100.00 70 4.55 31.20 -5.35 100.00 75 4.27 26.21 -3.46 100.00 80 4.23 21.21 -1.16 100.00 85 4.05 16.23 1.74 100.00 90 3.83 11.27 5.70 106.37 95 3.01 6.56 11.58 142.32 100 3.37 2.16 23.66 399.47 105 3.04 4.29 16.19 211.64 110 3.06 8.06 9.34 133.62 115 3.62 11.43 5.55 109.50 120 3.54 15.14 2.50 100.00 125 4.39 18.11 0.55 100.00 130 5.01 21.09 -1.10 100.00 135 5.54 23.97 -2.49 100.00 140 5.25 27.27 -3.89 100.00 145 5.00 30.32 -5.04 100.00 150 4.65 33.21 -6.03 100.00 155 3.40 36.60 -7.09 100.00 160 2.56 39.34 -7.87 100.00 165 2.23 41.28 -8.39 100.00 170 2.25 42.47 -8.70 100.00 175 2.46 42.99 -8.83 100.00 180 3.04 42.65 -8.75 100.00 185 3.27 42.19 -8.63 100.00 Frequency Coordination and Interference Analysis Report 03/13/2019 Page 9 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values NAPA, CA Licensee Name Intelsat License LLC Latitude (NAD 83) 38° 14' 41.6" N Longitude (NAD 83) 122° 16' 45.8" W Ground Elevation (AMSL) 13.14 m / 43.1 ft Antenna Centerline (AGL) 7.32 m / 24.0 ft Antenna Model Vertex 11.1 meter Antenna Mode Transmit 6.7 GHz Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Max Available RF Power -4.5/-12.9 (dBW/4 kHz) Transmit 6.7 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 190 3.61 41.15 -8.36 100.00 195 3.69 39.92 -8.03 100.00 200 3.78 38.25 -7.57 100.00 205 2.93 37.00 -7.20 100.00 210 2.66 34.85 -6.56 100.00 215 1.82 32.82 -5.90 103.73 220 1.04 30.44 -5.09 126.07 225 0.29 27.79 -4.10 176.84 230 0.00 24.63 -2.79 191.58 235 0.00 21.13 -1.12 197.96 240 0.00 17.51 0.92 205.72 245 0.00 13.82 3.48 214.22 250 0.00 10.05 6.94 229.11 255 0.00 6.57 11.56 277.13 260 0.24 5.59 13.32 384.22 265 0.43 8.35 8.96 215.88 270 0.51 12.62 4.47 191.59 275 0.44 17.32 1.03 182.67 280 0.40 22.15 -1.63 175.47 285 0.41 27.02 -3.79 163.63 290 0.80 31.88 -5.59 134.22 295 0.93 36.81 -7.15 123.81 300 0.74 41.79 -8.53 128.29 305 1.14 46.72 -9.74 109.50 310 0.70 51.73 -10.00 125.97 315 0.81 56.69 -10.00 120.71 320 0.89 61.66 -10.00 117.26 325 0.96 66.64 -10.00 114.13 330 0.84 71.62 -10.00 119.50 335 0.00 76.62 -10.00 162.08 340 0.00 81.60 -10.00 162.08 345 0.00 86.58 -10.00 162.08 350 0.00 91.55 -10.00 162.08 355 0.00 96.53 -10.00 162.08 Frequency Coordination and Interference Analysis Report 03/13/2019 Page 10 of 11

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: March 13, 2019 Frequency Coordination and Interference Analysis Report 03/13/2019 Page 11 of 11


Document Created: 2019-03-19 15:04:10
Document Modified: 2019-03-19 15:04:10
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