Attachment Exhibit B

This document pretains to SES-MOD-20101022-01324 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010102201324_846846

Exhibit B FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for XM RADIO, INC ELLENWOOD, GA (Call Sign E040204) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 October 15, 2010

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 10/15/2010 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 10/15/2010 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. Frequency Coordination and Interference Analysis Report 10/15/2010 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 09/17/2010. Company ALABAMA EDUCATIONAL TELEVISION COMMISSIO ATLANTA TELEVISION STATION WUPA INC American Broadcasting Companies, Inc. COMMUNITY TELEVISION, INC. Georgia Public Telecomm. Commission Georgia Television Company ION MEDIA ATLANTA LICENSE, INC. MEDIA GENERAL COMMUNICATIONS HOLDINGS, L MEREDITH CORPORATION MEREDITH CORPORATION - WGCL-TV New World Communications of Atlanta, Inc Pacific and Southern Company, Inc. SOUTH CAROLINA EDUCATIONAL TELEVISION CO TV ALABAMA, INC. - WCFT-TV Trinity Broadcasting Network Inc UGARF Media Holding, LLC UNIVISION ATLANTA, LLC WBRC License Subsidiary, LLC SBE Coordinator Atlanta Area 3G Wireless, LLC Broadcast Sports Corp Broadcast Sports Enterprises Inc. Casper, John Citywide News Network, Inc. Cohen, Elana FISHMAN BROTHERS ENTERPRISES GOODYEAR TIRE AND RUBBER COMPANY Heiden Mr, William Information Super Station LLC NSM Surveillance Onboard Images Production & Satellite Services, Inc. Regulus Media Services, Inc. REMOTE FACILITIES CONSULTING SERVICES RF Film, Inc RF Technology, LLC Total RF Marketing Inc Universal Satellite Communications Inc. Village Video Productions Inc WOLFE AIR AVIATION Wexler Video, Inc. Winged Vision Inc Frequency Coordination and Interference Analysis Report 10/15/2010 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 10/15/2010 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 10/15/2010 Job Number: 100917COMSGE01 Administrative Information Status ENGINEER PROPOSAL Call Sign E040204 Licensee Code XMSRAD Licensee Name XM RADIO, INC Site Information ELLENWOOD, GA Venue Name Latitude (NAD 83) 33° 39' 51.0" N Longitude (NAD 83) 84° 16' 24.0" W Climate Zone A Rain Zone 1 Ground Elevation (AMSL) 242.32 m / 795.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 80° W to 120° West Longitude Azimuth Range 172.3° to 232.4° Corresponding Elevation Angles 50.6° / 35.4° Antenna Centerline (AGL) 4.57 m / 15.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Vertex RSI Vertex RSI Model 7.2 Meter 7.2 Meter Gain / Diameter 41.8 dBi / 7.2 m 52.4 dBi / 7.2 m 3-dB / 15-dB Beamwidth 0.50° / 1.00° 0.20° / 0.40° Max Available RF Power (dBW/4 kHz) -1.0 (dBW/MHz) 23.0 Maximum EIRP (dBW/4 kHz) 51.4 (dBW/MHz) 75.4 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 2.0 GHz Transmit 7.0 GHz Emission / Frequency Range (MHz) 1M84G1E / 2332.5 – 2345.0 800KF2D / 7042.6 – 7074.4 100KG2D / 2332.5 – 2345.0 1M84G1E / 7056.845 – 7074.869 Max Great Circle Coordination Distance 303.0 km / 188.3 mi 187.7 km / 116.6 mi Precipitation Scatter Contour Radius 556.0 km / 345.4 mi 159.4 km / 99.0 mi Frequency Coordination and Interference Analysis Report 10/15/2010 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 ELLENWOOD, GA Licensee Name XM RADIO, INC Latitude (NAD 83) 33° 39' 51.0" N Longitude (NAD 83) 84° 16' 24.0" W Ground Elevation (AMSL) 242.32 m / 795.0 ft Antenna Centerline (AGL) 4.57 m / 15.0 ft Antenna Model Vertex RSI 7.2 Meter Antenna Mode Receive 2.0 GHz Transmit 7.0 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 -1.0 (dBW/4 kHz) Receive 2.0 GHz Transmit 7.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 4.50 121.58 -10.00 140.47 -10.00 100.00 5 4.50 125.51 -10.00 140.47 -10.00 100.00 10 3.59 128.87 -10.00 156.39 -10.00 100.00 15 2.30 127.87 -10.00 187.71 -10.00 100.00 20 1.66 125.58 -10.00 203.61 -10.00 105.73 25 0.97 123.05 -10.00 221.71 -10.00 123.92 30 0.00 120.17 -10.00 285.28 -10.00 177.26 35 0.00 117.83 -10.00 285.28 -10.00 177.26 40 0.28 115.47 -10.00 275.38 -10.00 168.65 45 0.34 112.81 -10.00 268.10 -10.00 160.56 50 0.35 110.00 -10.00 266.48 -10.00 159.14 55 0.42 107.10 -10.00 259.11 -10.00 152.76 60 0.41 104.08 -10.00 260.10 -10.00 153.61 65 0.40 100.99 -10.00 260.77 -10.00 154.18 70 0.30 97.84 -10.00 272.68 -10.00 164.61 75 0.29 94.67 -10.00 274.62 -10.00 167.98 80 0.00 91.48 -10.00 285.28 -10.00 177.26 85 0.39 88.29 -10.00 262.27 -10.00 155.48 90 0.65 85.07 -10.00 240.08 -10.00 137.20 95 0.72 81.87 -10.00 235.91 -10.00 133.94 100 0.55 78.76 -10.00 246.61 -10.00 142.44 105 0.70 75.62 -10.00 237.15 -10.00 134.90 110 0.81 72.55 -10.00 230.99 -10.00 131.38 115 0.85 69.58 -10.00 228.25 -10.00 129.22 120 1.00 66.66 -10.00 220.44 -10.00 122.86 125 1.05 63.91 -10.00 218.88 -10.00 121.56 130 0.97 61.38 -10.00 221.87 -10.00 124.05 135 1.26 58.78 -10.00 212.35 -10.00 115.93 140 1.85 56.13 -10.00 198.54 -10.00 101.07 145 1.68 54.27 -10.00 203.16 -10.00 105.31 150 1.20 52.98 -10.00 214.21 -10.00 117.56 155 1.12 51.65 -10.00 216.47 -10.00 119.51 160 1.06 50.65 -10.00 218.42 -10.00 121.17 165 1.20 49.79 -10.00 214.25 -10.00 117.59 170 0.95 49.67 -10.00 222.75 -10.00 124.77 175 0.72 49.93 -10.00 236.31 -10.00 134.25 180 0.68 50.18 -10.00 238.29 -10.00 135.79 185 0.51 50.04 -10.00 249.03 -10.00 144.42 Frequency Coordination and Interference Analysis Report 10/15/2010 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 ELLENWOOD, GA Licensee Name XM RADIO, INC Latitude (NAD 83) 33° 39' 51.0" N Longitude (NAD 83) 84° 16' 24.0" W Ground Elevation (AMSL) 242.32 m / 795.0 ft Antenna Centerline (AGL) 4.57 m / 15.0 ft Antenna Model Vertex RSI 7.2 Meter Antenna Mode Receive 2.0 GHz Transmit 7.0 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 -1.0 (dBW/4 kHz) Receive 2.0 GHz Transmit 7.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.60 49.05 -10.00 243.67 -10.00 140.07 195 0.56 47.61 -9.94 246.50 -9.94 142.27 200 0.94 45.31 -9.41 226.34 -9.41 127.00 205 1.11 42.80 -8.79 223.13 -8.79 123.66 210 0.62 40.60 -8.21 252.62 -8.21 144.83 215 0.51 38.51 -7.64 263.43 -7.64 152.98 220 0.47 36.82 -7.15 270.41 -7.15 158.23 225 0.41 35.69 -6.81 280.19 -6.81 167.85 230 0.39 35.11 -6.63 283.08 -6.63 170.10 235 0.34 35.17 -6.65 289.05 -6.65 175.23 240 0.27 35.87 -6.87 297.03 -6.87 182.18 245 0.00 37.33 -7.30 303.02 -7.30 187.68 250 0.20 38.87 -7.74 299.84 -7.74 185.82 255 0.32 40.97 -8.31 281.62 -8.31 171.47 260 0.42 43.47 -8.95 264.77 -8.95 156.09 265 0.35 46.43 -9.67 268.29 -9.67 160.23 270 0.70 49.39 -10.00 237.21 -10.00 134.95 275 0.88 52.69 -10.00 226.80 -10.00 128.06 280 1.01 56.22 -10.00 220.13 -10.00 122.60 285 1.34 59.82 -10.00 210.09 -10.00 113.92 290 1.97 63.46 -10.00 195.37 -10.00 100.00 295 1.80 67.49 -10.00 199.98 -10.00 102.38 300 2.70 71.32 -10.00 178.50 -10.00 100.00 305 3.91 75.25 -10.00 149.68 -10.00 100.00 310 3.91 79.47 -10.00 149.68 -10.00 100.00 315 5.30 83.62 -10.00 131.91 -10.00 100.00 320 6.47 87.92 -10.00 120.10 -10.00 100.00 325 6.73 92.30 -10.00 117.28 -10.00 100.00 330 6.97 96.70 -10.00 114.71 -10.00 100.00 335 8.06 101.19 -10.00 103.24 -10.00 100.00 340 7.13 105.46 -10.00 112.98 -10.00 100.00 345 6.23 109.62 -10.00 122.74 -10.00 100.00 350 6.37 113.91 -10.00 121.20 -10.00 100.00 355 5.40 117.82 -10.00 130.95 -10.00 100.00 Frequency Coordination and Interference Analysis Report 10/15/2010 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: October 15, 2010 Frequency Coordination and Interference Analysis Report 10/15/2010 Page 10 of 10


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Document Modified: 2010-10-22 11:10:16
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