Attachment Freq. Coordination

This document pretains to SES-MOD-20130807-00720 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2013080700720_1005727

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Discovery Communications, Inc. STERLING, VA (9 Meter) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 July 26, 2013

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 07/25/2013 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 07/25/2013 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. 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 Capital Communications of America Blue Ridge Carriers Appalachia Engineering Services B20 LLC Virginia Electric & Power Company No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 07/25/2013 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 05/30/2013. Company ADAMS COUNTY EMERGENCY MANAGEMENT AGENCY AT&T COMMUNICATIONS OF MARYLAND INC AT&T Communications of Virginia, LLC AT&T Corp. Alltel Communications LLC-Southern VA Alltel Communications of Petersburg Inc Appalachia Engineering Services Appalachian Broadcasting Atlantic Broadband (Delmar), LLC Atlantic Broadband (Penn), LLC B20 LLC BAY BROADBAND COMMUNICATIONS LLC Baltimore County of Maryland Baltimore Gas and Electric Company Believe Wireless, LLC Blue Ridge Carriers Capital Communications of America Cellco Partnership - Bridgeville, PA/WV Cellco Partnership - Southern Virginia Cellco Partnership- PA Region Cellco Partnership-Newark-Dallas Verizon Cellco Partnership-WDC/Baltimore Charles, County of Comprehensive Wireless LLC Conterra Ultra Broadband, LLC County of Frederick ECW Wireless, LLC Eastern MLG LLC Enoch Pratt Free Library FELHC, Inc. Firstlevel Networks Frederick County Fundamental Broadcasting LLC Garden State Transmissions Hanover, County of Hardy Cellular Telephone Company Harrisonburg-Rockingham ECC Last Mile Inc. Loudoun, County of MCI Communications Services Inc. Frequency Coordination and Interference Analysis Report 07/25/2013 Page 5 of 11

MVC Research. LLC Maryland Public Broadcasting Commission Maryland State Highway Administration Maryland, State of - Dept.of Info & Tech National Radio Astronomy Observatory 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 - PA Norfolk Southern Railway Old Dominion LLC Open Line Communications PA Communications PEG Bandwidth PENNSYLVANIA TURNPIKE COMMISSION Prince George's County Prince William, County of RAPPAHANNOCK ELECTRIC COOPERATIVE SCTF NET SHENANDOAH VALLEY ELECTRIC COOPERATIVE Southern Maryland Electric Cooperative I St. Mary's County of (MD) Stafford, County of State of Maryland, MIEMSS State of WV DHHR/BPH STECS Texas Eastern Communications, Inc. Thought Transmissions, LLC US Cellular Operating Company, LLC (WI) USCOC of Cumberland, Inc. Verizon Wireless (VAW) LLC - Maryland Verizon Wireless VAW LLC-Southern VA Virginia Broadband, LLC Virginia Cellular LLC Virginia Department of State Police Virginia Electric & Power Company Virginia PCS Alliance, L.C. Washington D.C. SMSA L.P. Washington Gas Light Company Washington Suburban Sanitary Commission World Class Wireless LLC iSignal Frequency Coordination and Interference Analysis Report 07/25/2013 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 07/25/2013 Page 7 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 07/25/2013 Job Number: 130530COMSGE02 Administrative Information Status ENGINEER PROPOSAL Call Sign E100042 Licensee Code DISCOM Licensee Name Discovery Communications, Inc. Site Information STERLING, VA Venue Name Latitude (NAD 83) 38° 59' 16.1" N Longitude (NAD 83) 77° 25' 31.1" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 92.05 m / 302.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 43° W to 143° West Longitude Azimuth Range 132.6° to 254.1° Corresponding Elevation Angles 32.6° / 10.2° Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer ViaSat ViaSat Model 8009 8009 Gain / Diameter 50.3 dBi / 9.0 m 53.8 dBi / 9.0 m 3-dB / 15-dB Beamwidth 0.58° / 1.20° 0.38° / 0.80° Max Available RF Power (dBW/4 kHz) -15.0 (dBW/MHz) 9.0 Maximum EIRP (dBW/4 kHz) 38.8 (dBW/MHz) 62.8 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) 30M0G7D / 3700.0 - 4200.0 30M0G7D / 5925.0 - 6425.0 Max Great Circle Coordination Distance 451.9 km / 280.7 mi 196.4 km / 122.0 mi Precipitation Scatter Contour Radius 539.1 km / 335.0 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 07/25/2013 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 STERLING, VA Licensee Name Discovery Communications, Inc. Latitude (NAD 83) 38° 59' 16.1" N Longitude (NAD 83) 77° 25' 31.1" W Ground Elevation (AMSL) 92.05 m / 302.0 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model ViaSat 9 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 -15.0 (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 0.23 105.70 -10.00 281.95 -10.00 127.99 5 0.24 110.62 -10.00 280.31 -10.00 126.92 10 0.00 115.51 -10.00 285.28 -10.00 130.16 15 0.00 112.95 -10.00 285.28 -10.00 130.16 20 0.21 108.91 -10.00 283.90 -10.00 129.27 25 0.47 104.81 -10.00 253.07 -10.00 108.41 30 0.52 100.62 -10.00 248.64 -10.00 105.35 35 0.57 96.40 -10.00 245.10 -10.00 102.80 40 0.41 92.16 -10.00 259.45 -10.00 112.87 45 0.37 87.93 -10.00 264.91 -10.00 116.62 50 0.34 83.71 -10.00 267.77 -10.00 118.56 55 0.48 79.48 -10.00 251.83 -10.00 107.53 60 0.58 75.27 -10.00 244.59 -10.00 102.43 65 0.64 71.09 -10.00 241.02 -10.00 100.00 70 0.71 66.95 -10.00 236.65 -10.00 100.00 75 0.73 62.88 -10.00 235.62 -10.00 100.00 80 0.75 58.89 -10.00 234.46 -10.00 100.00 85 0.74 55.01 -10.00 234.85 -10.00 100.00 90 0.76 51.24 -10.00 233.82 -10.00 100.00 95 0.78 47.63 -9.95 232.76 -9.95 100.00 100 0.73 44.26 -9.15 240.30 -9.15 100.00 105 0.76 41.10 -8.35 243.08 -8.35 100.00 110 0.81 38.25 -7.57 244.54 -7.57 100.00 115 0.86 35.78 -6.84 245.53 -6.84 100.00 120 0.84 33.86 -6.24 250.35 -6.24 100.38 125 0.71 32.64 -5.84 261.44 -5.84 107.51 130 0.74 31.91 -5.60 261.10 -5.60 106.85 135 0.69 31.95 -5.61 263.99 -5.61 108.88 140 0.56 32.76 -5.88 270.90 -5.88 114.08 145 0.53 34.12 -6.32 270.37 -6.32 114.47 150 0.53 36.02 -6.91 266.60 -6.91 112.89 155 0.53 38.33 -7.59 262.34 -7.59 111.07 160 0.58 40.35 -8.15 255.33 -8.15 107.09 165 0.50 42.11 -8.61 258.48 -8.61 110.04 170 0.52 43.32 -8.92 254.98 -8.92 108.08 175 0.52 44.08 -9.11 253.74 -9.11 107.51 180 0.00 44.86 -9.30 289.79 -9.30 132.05 185 0.00 44.60 -9.23 290.21 -9.23 132.22 Frequency Coordination and Interference Analysis Report 07/25/2013 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 STERLING, VA Licensee Name Discovery Communications, Inc. Latitude (NAD 83) 38° 59' 16.1" N Longitude (NAD 83) 77° 25' 31.1" W Ground Elevation (AMSL) 92.05 m / 302.0 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model ViaSat 9 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 -15.0 (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 43.82 -9.04 291.44 -9.04 132.73 195 0.00 42.56 -8.73 293.51 -8.73 133.58 200 0.00 40.86 -8.28 296.44 -8.28 133.53 205 0.00 38.77 -7.71 300.25 -7.71 135.10 210 0.00 36.34 -7.01 305.01 -7.01 137.09 215 0.00 33.62 -6.17 310.84 -6.17 139.56 220 0.00 30.67 -5.17 318.49 -5.17 142.60 225 0.00 27.51 -3.99 326.93 -3.99 146.33 230 0.00 24.19 -2.59 337.12 -2.59 150.97 235 0.00 20.74 -0.92 349.62 -0.92 156.84 240 0.00 17.17 1.13 365.34 1.13 164.48 245 0.00 13.60 3.66 385.42 3.66 175.96 250 0.00 10.96 6.01 404.09 6.01 185.02 255 0.00 10.23 6.75 451.87 6.75 196.42 260 0.00 11.78 5.22 397.50 5.22 181.98 265 0.00 14.91 2.66 377.38 2.66 172.06 270 0.00 18.85 0.12 357.49 0.12 160.63 275 0.00 23.19 -2.13 340.51 -2.13 152.54 280 0.00 27.75 -4.08 326.26 -4.08 146.03 285 0.00 32.42 -5.77 314.23 -5.77 140.75 290 0.00 37.18 -7.26 303.33 -7.26 136.39 295 0.00 41.98 -8.58 294.50 -8.58 133.99 300 0.00 46.82 -9.76 286.81 -9.76 130.81 305 0.00 51.68 -10.00 285.28 -10.00 130.16 310 0.00 56.56 -10.00 285.28 -10.00 130.16 315 0.00 61.45 -10.00 285.28 -10.00 130.16 320 0.00 66.35 -10.00 285.28 -10.00 130.16 325 0.00 71.26 -10.00 285.28 -10.00 130.16 330 0.00 76.17 -10.00 285.28 -10.00 130.16 335 0.00 81.09 -10.00 285.28 -10.00 130.16 340 0.00 86.01 -10.00 285.28 -10.00 130.16 345 0.00 90.93 -10.00 285.28 -10.00 130.16 350 0.00 95.85 -10.00 285.28 -10.00 130.16 355 0.00 100.77 -10.00 285.28 -10.00 130.16 Frequency Coordination and Interference Analysis Report 07/25/2013 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: July 26, 2013 Frequency Coordination and Interference Analysis Report 07/25/2013 Page 11 of 11


Document Created: 2013-07-26 13:55:00
Document Modified: 2013-07-26 13:55:00
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