Attachment Exhibit A

This document pretains to SES-MOD-20180418-00364 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2018041800364_1376390

Exhibit A FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Intelsat License LLC HAGERSTOWN, MD (KA261) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 April 03, 2018

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA .................................................................................................. 9 5. CERTIFICATION ......................................................................................................................................... 13 Frequency Coordination and Interference Analysis Report 04/03/2018 Page 2 of 13

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 04/03/2018 Page 3 of 13

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 04/03/2018 Page 4 of 13

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 03/19/2018. Company AB Services LLC AT&T Corp. AT&T Wireless Services 3 LLC - PA Adams County Department of Emergency Svc Affiniti PA, LLC Albemarle, County of, Virginia Appalachia Engineering Services Argos Engineering, LLC Atlantic Broadband (Penn), LLC Atlantic City Electric Company Atlantic, County of Baltimore County of Maryland Baltimore Gas and Electric Company Beaver Springs Faith Baptist Church, Inc Bedford County of Believe Wireless, LLC Berks County Department of Emergency Ser Blair County 911 Blue Ridge Carriers Blueline Communications CBS Radio of Maryland, LLC Calvert, County of Cambria, County of Capital Communications of America Caroline County, VA Carroll, County of Cellco Partnership - Bridgeville, PA/WV Cellco Partnership - Southern Virginia Cellco Partnership- PA Region Cellco Partnership-WDC/Baltimore Cellco Prtnrshp - Phil. Tri-State Rgn Centre Communications Inc. Charles, County of Chester, County of City of Fredericksburg Clearfield, County of Clinton, County of Columbia Gas Transmission, LLC Columbia, County Commonwealth of Pennsylvania-Radio Proj. Comprehensive Wireless LLC Frequency Coordination and Interference Analysis Report 04/03/2018 Page 5 of 13

Conterra Ultra Broadband, LLC Coralinks County of Augusta County of Centre County of Culpeper County of Fayette County of Frederick County of Lycoming County of York DSRC Networks Dauphin County Emergency Management Delaware County (PA) Emergency Services Delaware Division of Communications Delmarva Broadcasting Company Delmarva Power and Light Company Dominion Energy Transmission, Inc. ECW Wireless, LLC Eastern MLG LLC Enoch Pratt Free Library Essex, County of Exelon Generation Company, LLC FELHC, Inc. Frederick County Fulton County of (PA) Fundamental Broadcasting LLC GTT America LLC Garden State Transmissions Getwireless.Net Gloucester, County of Greene, County of (PA) Hanover, County of Hardy Cellular Telephone Company Hardy County OEM/E911 Harrisonburg-Rockingham ECC High Voltage Communications LLC (CFN) Huntingdon County, Pa Huntingdon, County of Indiana, County of Jefferson County of Pennsylvania Jefferson Microwave, LLC Juniata County Emergency Services King and Queen County Kryptick Technologies Lancaster County-Wide Communications Loudoun, County of MCI Communications Services Inc. Maryland Public Broadcasting Commission Maryland State Highway Administration Maryland, State of - Dept.of Info & Tech Mifflin County Montgomery County Of Montgomery, County of Mountain State Communications, llc National Tower Company LLC New Cingular Wireless PCS LLC - NJ New Cingular Wireless PCS - Maryland Frequency Coordination and Interference Analysis Report 04/03/2018 Page 6 of 13

New Cingular Wireless PCS LLC - DC New Cingular Wireless PCS LLC - VA New Cingular Wireless PCS LLC - WV,NC,SC New Cingular Wireless PCS LLC-DE/NH/RI New Cingular Wireless PCS, LLC - PA New Jersey Turnpike Authority-Pkwy Div New Jersey, State of -NJ Transit New Line Networks, LLC Norfolk Southern Railway Northumberland County DPS/911 PSEG Services Corporation Peco Energy Company Pennsylvania Turnpike Commission Perry, County of Pittsburgh SMSA Limited Partnership Preston County Office of Emergency Manag Prince George's County Prince William, County of Radio One Inc Rappahannock Electric Cooperative Rural Broadband Network Services LLC SW Networks Shenandoah Personal Communications, LLC Shenandoah Valley Electric Cooperative Somerset, County of South Central Task Force (SCTFNET) Southern Maryland Electric Cooperative I Spotsylvania, County of St. Mary's County of (MD) Stafford, County of State of Maryland, MIEMSS T-Mobile License LLC Texas Eastern Communications, LLC The Voice Radio, LLC Thought Transmissions, LLC Torellco LLC Transcontinental Gas Pipeline Corp. US Cellular Operating Company, LLC (WI) USCOC of Cumberland, Inc. USCOC of Virginia RSA #3, Inc. USOC of Pennsylvania RSA No 10 B2 Inc. Uniti Fiber PEG, LLC Ursa Navigation Solutions, Inc. Verizon Maryland, Inc. Verizon Wireless (VAW) LLC - Maryland Verizon Wireless (VAW) LLC - W/B/V Mkts Verizon Wireless (VAW) LLC-Pennsylvania Verizon Wireless VAW LLC-Southern VA Virginia Broadband, LLC Virginia Department of State Police Virginia Electric & Power Company WV DHHR BPH, Office of Ems, Com. Div. Warrenton Fauquier Joint Communications Washington Gas Light Company Washington Suburban Sanitary Commission Webline Holdings LLC Frequency Coordination and Interference Analysis Report 04/03/2018 Page 7 of 13

Westmoreland, County of Wicomico County Wireless Internetwork LLC World Class Wireless, LLC iSignal xWave Engineering LLC Frequency Coordination and Interference Analysis Report 04/03/2018 Page 8 of 13

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 04/03/2018 Page 9 of 13

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 04/03/2018 Job Number: 180319COMSGE04 Administrative Information Status ENGINEER PROPOSAL Call Sign KA261 Licensee Code INTELS Licensee Name Intelsat License LLC Site Information HAGERSTOWN, MD Venue Name Latitude (NAD 83) 39° 35' 57.0" N Longitude (NAD 83) 77° 45' 22.0" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 166.0 m / 544.6 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 6° W to 65° West Longitude Azimuth Range 101.9° to 160.4° Corresponding Elevation Angles 5.3° / 42.3° Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Vertex Vertex Model 15.2 KPC 15.2 KPC Gain / Diameter 55.0 dBi / 15.2 m 58.4 dBi / 15.2 m 3-dB / 15-dB Beamwidth 0.32° / 0.57° 0.21° / 0.39° Max Available RF Power (dBW/4 kHz) 3.0 (dBW/MHz) 27.0 Maximum EIRP (dBW/4 kHz) 61.4 (dBW/MHz) 85.4 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) 500KG7W / 3700.0 - 4200.0 850KFXD / 6173.7 - 6173.7 850KFXD / 6176.3 - 6176.3 Max Great Circle Coordination Distance 748.9 km / 465.3 mi 513.7 km / 319.2 mi Precipitation Scatter Contour Radius 613.5 km / 381.2 mi 269.5 km / 167.4 mi Frequency Coordination and Interference Analysis Report 04/03/2018 Page 10 of 13

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values HAGERSTOWN, MD Licensee Name Intelsat License LLC Latitude (NAD 83) 39° 35' 57.0" N Longitude (NAD 83) 77° 45' 22.0" W Ground Elevation (AMSL) 166.0 m / 544.6 ft Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Model Vertex 15.2 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 3.0 (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 0.23 101.82 -10.00 281.47 -10.00 189.60 5 0.23 96.84 -10.00 282.05 -10.00 190.07 10 0.00 91.86 -10.00 285.28 -10.00 192.68 15 0.29 86.88 -10.00 274.54 -10.00 183.84 20 0.00 81.90 -10.00 285.28 -10.00 192.68 25 0.00 76.93 -10.00 285.28 -10.00 192.68 30 0.00 71.95 -10.00 285.28 -10.00 192.68 35 0.00 66.97 -10.00 285.28 -10.00 192.68 40 0.00 62.00 -10.00 285.28 -10.00 192.68 45 0.00 57.03 -10.00 285.28 -10.00 192.68 50 0.00 52.06 -10.00 285.28 -10.00 192.68 55 0.00 47.10 -9.82 286.40 -9.82 193.35 60 0.00 42.14 -8.62 294.23 -8.62 197.97 65 0.00 37.19 -7.26 303.30 -7.26 203.14 70 0.00 32.26 -5.72 314.61 -5.72 207.43 75 0.00 27.35 -3.92 327.40 -3.92 214.60 80 0.00 22.47 -1.79 343.07 -1.79 223.63 85 0.00 17.66 0.83 362.98 0.83 235.46 90 0.00 12.98 4.17 388.85 4.17 251.14 95 0.00 8.67 8.55 426.05 8.55 275.19 100 0.00 5.62 13.26 748.92 13.26 513.70 105 0.00 6.15 12.28 541.99 12.28 357.46 110 0.00 9.60 7.45 416.38 7.45 268.81 115 0.00 13.27 3.93 387.54 3.93 249.92 120 0.00 16.89 1.31 366.72 1.31 237.73 125 0.00 20.41 -0.75 350.91 -0.75 228.25 130 0.00 23.83 -2.43 338.33 -2.43 220.88 135 0.00 27.11 -3.83 328.09 -3.83 214.99 140 0.00 30.23 -5.01 319.61 -5.01 210.21 145 0.00 33.14 -6.01 311.94 -6.01 206.30 150 0.00 35.82 -6.85 306.10 -6.85 204.71 155 0.00 38.20 -7.55 301.33 -7.55 202.04 160 0.00 40.26 -8.12 297.51 -8.12 199.87 165 0.00 41.93 -8.56 294.59 -8.56 198.19 170 0.00 43.16 -8.88 292.52 -8.88 196.98 175 0.00 44.28 -9.16 290.71 -9.16 195.91 180 0.00 45.81 -9.52 288.32 -9.52 194.50 185 0.00 47.72 -9.97 285.49 -9.97 192.81 Frequency Coordination and Interference Analysis Report 04/03/2018 Page 11 of 13

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values HAGERSTOWN, MD Licensee Name Intelsat License LLC Latitude (NAD 83) 39° 35' 57.0" N Longitude (NAD 83) 77° 45' 22.0" W Ground Elevation (AMSL) 166.0 m / 544.6 ft Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Model Vertex 15.2 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 3.0 (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 0.00 49.95 -10.00 285.28 -10.00 192.68 195 0.00 52.47 -10.00 285.28 -10.00 192.68 200 0.00 55.23 -10.00 285.28 -10.00 192.68 205 0.00 58.19 -10.00 285.28 -10.00 192.68 210 0.00 61.32 -10.00 285.28 -10.00 192.68 215 0.00 64.60 -10.00 285.28 -10.00 192.68 220 0.32 67.87 -10.00 270.05 -10.00 180.00 225 0.23 71.40 -10.00 281.23 -10.00 189.39 230 0.00 75.02 -10.00 285.28 -10.00 192.68 235 0.00 78.64 -10.00 285.28 -10.00 192.68 240 0.00 82.29 -10.00 285.28 -10.00 192.68 245 0.00 85.97 -10.00 285.28 -10.00 192.68 250 0.00 89.67 -10.00 285.28 -10.00 192.68 255 0.00 93.36 -10.00 285.28 -10.00 192.68 260 0.00 97.05 -10.00 285.28 -10.00 192.68 265 0.25 100.75 -10.00 279.20 -10.00 187.73 270 0.25 104.39 -10.00 278.72 -10.00 187.33 275 0.29 107.98 -10.00 274.02 -10.00 183.39 280 0.21 111.47 -10.00 284.23 -10.00 191.83 285 0.00 114.80 -10.00 285.28 -10.00 192.68 290 0.00 118.10 -10.00 285.28 -10.00 192.68 295 0.00 121.26 -10.00 285.28 -10.00 192.68 300 0.00 124.25 -10.00 285.28 -10.00 192.68 305 0.20 127.19 -10.00 284.85 -10.00 192.33 310 0.00 129.62 -10.00 285.28 -10.00 192.68 315 0.00 131.90 -10.00 285.28 -10.00 192.68 320 0.00 133.87 -10.00 285.28 -10.00 192.68 325 0.00 135.47 -10.00 285.28 -10.00 192.68 330 0.00 131.65 -10.00 285.28 -10.00 192.68 335 0.30 126.71 -10.00 272.66 -10.00 182.24 340 0.26 121.73 -10.00 277.79 -10.00 186.56 345 0.23 116.75 -10.00 281.95 -10.00 189.98 350 0.00 111.77 -10.00 285.28 -10.00 192.68 355 0.31 106.80 -10.00 271.84 -10.00 181.55 Frequency Coordination and Interference Analysis Report 04/03/2018 Page 12 of 13

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: April 03, 2018 Frequency Coordination and Interference Analysis Report 04/03/2018 Page 13 of 13


Document Created: 2018-04-18 15:54:46
Document Modified: 2018-04-18 15:54:46
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