Supplemental Letter

SUPPLEMENT submitted by AT&T Corp.

Supplemental Letter

2018-11-14

This document pretains to SES-MOD-20181017-03678 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2018101703678_1572929

Jennifer D. Hindin 202.719.4975 jhindin@wileyrein.com VIA ELECTRONIC FILING November 14, 2018 Marlene H. Dortch Office of the Secretary Federal Communications Commission 445 12th Street, SW Washington, DC 20554 Re: AT&T Corp. Application for Modification of Call Sign E980493 to Add New Antenna, IBFS File No. SES‐MOD‐INTR2018‐09338 Dear Ms. Dortch: AT&T Corp., by its undersigned counsel, respectfully notifies the Federal Communications Commission that the coordination process for the above‐captioned earth station modification application has been completed. Attached is the final Frequency Coordination and Interference Analysis Report for inclusion in the FCC’s files for the above‐referenced earth station application. Should you have any questions regarding this filing, please do not hesitate to contact me. Respectfully Submitted, /s/ Jennifer D. Hindin Jennifer D. Hindin Counsel for AT&T Corp. 1776 K Street NW | Washington, DC 20006 | 202.719.7000 wileyrein.com

Attachment Coordination Report for 13.1-meter Antenna

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for AT&T Corp - ROARING CRK, PA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 October 31, 2018

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA .................................................................................................. 8 5. CERTIFICATION ......................................................................................................................................... 12 Frequency Coordination and Interference Analysis Report 10/31/2018 Page 2 of 12

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 10/31/2018 Page 3 of 12

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 Webline Holdings LLC xWave Engineering LLC Kryptick Technologies Northumberland County DPS/911 No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 10/31/2018 Page 4 of 12

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 10/15/2018. Company AB Services LLC AQ2AT LLC AT&T Corp. AT&T Wireless Services 3 LLC - PA Adams County Department of Emergency Svc Affiniti PA, LLC Agile Network Builders LLC Algonquin Gas Transmission, LLC Allentown SMSA Limited Partnership Alltel Communications LLC - Western PA Alltel Communications LLC-E OH WV American Electric Power Service Corp Auburn Data Systems, LLC Beaver Springs Faith Baptist Church, Inc Bedford County of Berks County Department of Emergency Ser Binghamton MSA Limited Partnership(NY) Blair County 911 Blue Ridge Carriers Blueline Communications Bradford County Bucks County Dept. of Emergency Comm Cambria, County of Capital Communications of America Carbon, County of 911 Center Cellco Partnership - Bridgeville, PA/WV Cellco Partnership- PA Region Chemung County City of New York Clearfield, County of Clinton, County of Commonwealth of Pennsylvania-Radio Proj. Comprehensive Wireless LLC Consolidated Edison Company of New York Conterra Ultra Broadband, LLC County of Centre County of Fayette County of Lycoming County of Pike County of Tioga County of Warren, NJ Frequency Coordination and Interference Analysis Report 10/31/2018 Page 5 of 12

County of York DSRC Networks Dauphin County Emergency Management Direct Broadcast Services, Inc. Dominion Energy Transmission, Inc. EMS of Northeast Pennsylvania East Ohio Gas Company Eastern MLG LLC Eastern Pennsylvania EMS Council Electric Railroad, LLC Essex County Sheriff's Office (NJ) FELHC, Inc. GTT America LLC Garden State Transmissions Getwireless.Net Hammarlund Research LLC High Voltage Communications LLC (CFN) Higher Ground LLC Highway Networks, LLC Huntingdon, County of Indiana, County of Jefferson Microwave, LLC Jefferson, County Of Juniata County Emergency Services Kryptick Technologies Lackawanna, County of Lancaster County-Wide Communications Limitless Mobile, LLC Luzerne County of PA McKean, County of Middlesex, County of Mifflin County Monmouth, County of Monroe County Control Center (PA) Montgomery County Of Morris, County of Mountain State Communications, llc NYNEX Mobile of New York LP Nassau County Police Department New Cingular Wireless PCS LLC - NJ New Cingular Wireless PCS, LLC (NY) New Cingular Wireless PCS, LLC - PA New Jersey State Police New Jersey Transit Rail Operations, Inc. New Jersey, State of -NJ Transit New Line Networks, LLC New York City Police Department New York RSA No. 3 Cellular Partnership New York State Electric & Gas Corp Norfolk Southern Railway Northeast Pennsylvania SMSA LTD Prtnrsh Northumberland County DPS/911 Office of Emergency Telecom Services, NJ Ohio Networks Orange County Dept of Emergency Services Orange and Rockland Utilities, Inc. Frequency Coordination and Interference Analysis Report 10/31/2018 Page 6 of 12

PSEG Services Corporation Peco Energy Company Pennsylvania 3 Sector 2, L.P. - PA Regn Pennsylvania Turnpike Commission Perry, County of Pike County Commissioners Pittsburgh SMSA Limited Partnership Port Authority of New York & New Jersey Potter County of (PA) Qoncept Holdings LLC Radio License Holding CBC, LLC SW Networks Schuyler, County of Shenandoah Personal Communications, LLC Snyder, County of Somerset County Dept. of Emergency Servi South Central Task Force (SCTFNET) Sullivan, County of T-Mobile License LLC Texas Eastern Communications, LLC Tioga, County of Tompkins, County Dept of Emergency Respo Torellco LLC Transcontinental Gas Pipeline Corp. Transwave Communication Systems, Inc. Uniti Fiber PEG, LLC Verizon Wireless (VAW) LLC-Pennsylvania WV DHHR BPH, Office of Ems, Com. Div. Webline Holdings LLC Westmoreland, County of Williams Energy Services Wireless Internetwork LLC World Class Wireless, LLC iSignal xWave Engineering LLC Frequency Coordination and Interference Analysis Report 10/31/2018 Page 7 of 12

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 10/31/2018 Page 8 of 12

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 10/31/2018 Job Number: 181015COMSGE13 Administrative Information Status ENGINEER PROPOSAL Call Sign E980493 Licensee Code P1175P Licensee Name AT&T Corp - Site Information ROARING CRK, PA Venue Name Latitude (NAD 83) 40° 53' 39.3" N Longitude (NAD 83) 76° 26' 19.8" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 292.61 m / 960.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 4.6° W to 148.2° West Longitude Azimuth Range 102.1° to 257.8° Corresponding Elevation Angles 5.0° / 5.0° Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Gen Dynamics Gen Dynamics Model Satcom Satcom Gain / Diameter 53.5 dBi / 13.1 m 57.3 dBi / 13.1 m 3-dB / 15-dB Beamwidth 0.38° / 0.76° 0.26° / 0.52° Max Available RF Power (dBW/4 kHz) -2.7 (dBW/MHz) 21.3 Maximum EIRP (dBW/4 kHz) 54.6 (dBW/MHz) 78.6 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) 54K6G7W - 72M0G7W / 3700.0 - 4200.0 54K6G7W - 72M0G7W / 5850.0 - 6425.0 Max Great Circle Coordination Distance 743.1 km / 461.7 mi 448.0 km / 278.3 mi Precipitation Scatter Contour Radius 621.4 km / 386.1 mi 101.8 km / 63.2 mi Frequency Coordination and Interference Analysis Report 10/31/2018 Page 9 of 12

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values ROARING CRK, PA Licensee Name AT&T Corp Latitude (NAD 83) 40° 53' 39.3" N Longitude (NAD 83) 76° 26' 19.8" W Ground Elevation (AMSL) 292.61 m / 960.0 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model Gen Dynamics 13.1 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 -2.7 (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 0.00 102.08 -10.00 285.28 -10.00 170.66 5 1.55 97.11 -10.00 206.75 -10.00 103.55 10 2.47 92.12 -10.00 183.74 -10.00 100.00 15 2.63 87.13 -10.00 180.05 -10.00 100.00 20 2.36 82.13 -10.00 186.24 -10.00 100.00 25 2.23 77.14 -10.00 189.36 -10.00 100.00 30 2.00 72.15 -10.00 194.54 -10.00 100.00 35 1.66 67.16 -10.00 203.72 -10.00 100.72 40 1.34 62.18 -10.00 210.18 -10.00 108.89 45 1.06 57.21 -10.00 218.49 -10.00 116.11 50 1.13 52.22 -10.00 216.27 -10.00 114.22 55 1.06 47.25 -9.86 219.10 -9.86 116.45 60 1.55 42.23 -8.64 210.46 -8.64 107.48 65 1.22 37.28 -7.29 227.41 -7.29 120.07 70 0.64 32.38 -5.76 266.66 -5.76 146.54 75 0.49 27.46 -3.97 289.45 -3.97 162.55 80 0.31 22.58 -1.84 327.57 -1.84 190.84 85 0.24 17.74 0.77 357.39 0.77 206.79 90 0.33 12.96 4.18 372.16 4.18 211.80 95 0.28 8.52 8.74 416.67 8.74 237.32 100 0.25 5.16 14.18 743.11 14.18 448.01 105 0.43 5.37 13.75 568.27 13.75 328.01 110 0.99 8.48 8.80 354.94 8.80 193.03 115 1.39 11.79 5.22 306.86 5.22 162.04 120 1.74 15.05 2.56 272.44 2.56 140.25 125 2.30 18.07 0.57 240.93 0.57 121.86 130 2.50 21.22 -1.17 224.93 -1.17 111.54 135 2.21 24.59 -2.77 222.90 -2.77 111.46 140 1.88 27.82 -4.11 224.13 -4.11 113.78 145 2.05 30.47 -5.10 214.31 -5.10 106.57 150 2.55 32.56 -5.82 202.16 -5.82 100.00 155 2.59 34.75 -6.52 197.87 -6.52 100.00 160 3.13 36.14 -6.95 184.11 -6.95 100.00 165 3.71 37.08 -7.23 169.55 -7.23 100.00 170 3.28 38.57 -7.66 176.99 -7.66 100.00 175 3.23 39.28 -7.85 177.26 -7.85 100.00 180 3.05 39.68 -7.96 180.62 -7.96 100.00 185 2.87 39.63 -7.95 184.68 -7.95 100.00 Frequency Coordination and Interference Analysis Report 10/31/2018 Page 10 of 12

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values ROARING CRK, PA Licensee Name AT&T Corp - Latitude (NAD 83) 40° 53' 39.3" N Longitude (NAD 83) 76° 26' 19.8" W Ground Elevation (AMSL) 292.61 m / 960.0 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model Gen Dynamics 13.1 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 -2.7 (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 2.76 39.07 -7.80 187.89 -7.80 100.00 195 2.56 38.17 -7.54 193.60 -7.54 100.00 200 2.32 36.88 -7.17 200.74 -7.17 100.00 205 2.04 35.23 -6.67 206.77 -6.67 101.67 210 2.11 32.93 -5.94 208.63 -5.94 102.42 215 1.93 30.56 -5.13 217.33 -5.13 109.19 220 1.76 27.91 -4.14 227.64 -4.14 116.62 225 1.65 25.01 -2.95 238.25 -2.95 123.55 230 1.16 22.21 -1.66 264.02 -1.66 139.31 235 0.95 19.05 0.00 285.54 0.00 153.40 240 1.59 15.17 2.48 277.57 2.48 144.03 245 2.11 11.28 5.69 283.76 5.69 143.95 250 2.49 7.43 10.22 309.92 10.22 155.41 255 2.37 3.87 17.30 554.30 17.30 315.28 260 1.52 4.12 16.63 740.41 16.63 445.94 265 0.84 8.30 9.02 367.56 9.02 201.62 270 0.46 12.99 4.16 356.15 4.16 202.13 275 0.51 17.74 0.78 322.71 0.78 182.90 280 0.39 22.63 -1.87 318.20 -1.87 183.69 285 0.64 27.50 -3.98 278.14 -3.98 153.24 290 0.00 32.52 -5.81 313.99 -5.81 186.90 295 0.00 37.47 -7.34 302.76 -7.34 180.97 300 0.00 42.42 -8.69 293.76 -8.69 175.75 305 0.00 47.38 -9.89 285.98 -9.89 171.09 310 0.00 52.35 -10.00 285.28 -10.00 170.66 315 0.00 57.32 -10.00 285.28 -10.00 170.66 320 0.00 62.29 -10.00 285.28 -10.00 170.66 325 0.00 67.27 -10.00 285.28 -10.00 170.66 330 0.00 72.25 -10.00 285.28 -10.00 170.66 335 0.00 77.23 -10.00 285.28 -10.00 170.66 340 0.00 82.21 -10.00 285.28 -10.00 170.66 345 0.00 87.19 -10.00 285.28 -10.00 170.66 350 0.00 92.17 -10.00 285.28 -10.00 170.66 355 0.00 97.15 -10.00 285.28 -10.00 170.66 Frequency Coordination and Interference Analysis Report 10/31/2018 Page 11 of 12

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: October 31, 2018 Frequency Coordination and Interference Analysis Report 10/31/2018 Page 12 of 12


Document Created: 2018-11-14 17:04:31
Document Modified: 2018-11-14 17:04:31
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