Attachment Exhibit A

This document pretains to SES-MOD-20101014-01388 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010101401388_845034

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Globecomm Systems, Inc. Laurel, Maryland Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 September 29, 2010 {00222702-1 }

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA .................................................................................................. 8 5. CERTIFICATION ......................................................................................................................................... 12 E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } 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. E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } 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 None No carriers reported potential interference cases. E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } 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. Expedited coordination data for this earth station was emailed and sent to the below listed carriers with a letter dated September 22, 2010. Company ACCELACOM-BALTIMORE LLC ALLEGANY COLLEGE OF MARYLAND ART Licensing Corp. AT&T COMMUNICATIONS OF MARYLAND INC AT&T COMMUNICATIONS OF VIRGINIA INC AT&T CORP Airband Communications Inc Albermarle, County of, Virginia Allegheny Power Service Corporation Allentown SMSA Limited Partnership Alltel Communications of Virginia #1 LLC Alltel Communications of Virginia, Inc. Atlantic Broadband (Delmar), LLC Atlantic Broadband (Penn), LLC BALTIMORE CITY DEPARTMENT OF PUBLIC WORK BAY BROADBAND COMMUNICATIONS LLC BEDFORD COUNTY 911 Baltimore County of Maryland Baltimore Gas and Electric Company Believe Wireless, LLC Berks, County of Blaze Broadband Bucks, County of CHESTER, COUNTY OF COMMONWEALTH OF PENNSYLVANIA,RADIO PROJ. Cambria, County of Cape May County Municipal Utilities Auth Cape May County, MIS Department Cellco Partnership - Southern Virginia Cellco Partnership- PA Region Cellco Partnership-Newark-Dallas Verizon Cellco Prtnrshp - Phil. Tri-State Rgn Chesterfield, County of City of Laurel City of Ocean City, MD E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } Page 5 of 12

Company (Continued) Clearwire Spectrum Holdings II, LLC Clearwire Spectrum Holdings III, LLC Clearwire Spectrum Holdings LLC Conterra Ultra Broadband, LLC County of Burlington County of Stafford Cricket Communications, Inc Cumberland, County of D&E Communications, Inc. DELAWARE STATE - DTI Eduro Networks LLC Enoch Pratt Free Library Exelon Generation Company, L.L.C FiberTower Network Services Corp. Franklin County Dept. of Emergency Servi Frederick County GEORGE MASON UNIVERSITY INSTR FNDTION GETWIRELESS.NET Gannett Company, Inc. Globecomm Systems, Inc. HANOVER COUNTY HENRICO COUNTY Hampton Roads Planning District Commissi Hardy Cellular Telephone Company Harrisonburg-Rockingham ECC Huntingdon County of International Communications Group, Inc. JUNIATA COUNTY OF Kent County Levy Court LANCASTER COUNTY OF LB Tower Company LLC LOWER SHORE BROADBAND COOPERATIVE Last Mile Inc. Lehigh, County of Loudoun County Public Schools Loudoun Wireless LLC Loudoun, County of M&T Bank METROPOLITAN AREA NETWORKS, INC. MIFFLIN COUNTY MIT LINCOLN LABORATORY Maryland Port Administration Maryland Public Broadcasting Commission Maryland State Highway Administration Maryland, State of - Budget & Management Middle East Broadcasting Networks, Inc. Montgomery, County of NEW JERSEY STATE POLICE NOROC Broadband LLC National Radio Astronomy Observatory Netrepid, Inc. E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } Page 6 of 12

Company (Continued) New Cingular Wireless PCS - VA/DC/MD New Cingular Wireless PCS LLC - DC New Cingular Wireless PCS of PA LLC New Cingular Wireless PCS, LLC - PA New Cingular Wireless PCS, LLC - WV/VA New Jersey Turnpike Authority New Jersey Turnpike Authority-Pkwy Div New Jersey, State of -NJ Transit New Kent County Nextlink Wireless, Inc Northern Virginia Electric Cooperative ORBCOMM GLOBAL LP Open Range Communications PENNSYLVANIA MICROWAVE NETWORK INC. PENNSYLVANIA TURNPIKE COMMISSION Petersburg Cellular Partnership Petersburg Police Department Philly Sports Wireless Pontis Communications, Inc. Port Networks, LLC Public Broadcasting Service QUALCOMM INC. RAYTHEON COMPANY RCTC Wholesale Corporation - Verizon Roadstar Internet, Inc. Rural Broadband Network Services LLC SCHUYLKILL, COUNTY OF SCTF NET SECOM NET SOUTHEASTERN PENNSYLVANIA TRANSIT AUTH Salem County Information Technology Somerset County, Maryland State of Maryland, MIEMSS Synergy Telecommunications Corp Telecom Transport Management, Inc UNION, COUNTY OF UNIVERSITY OF MARYLAND USCOC of Cumberland, Inc. USCOC of Virginia RSA #3, Inc. Verizon New Jersey, Inc. Verizon Virginia, Inc. Virginia Broadband, LLC Virginia Electric & Power Company Virginia RSA #7, Inc. WASHINGTON SUBURBAN SANITARY COMMISSION WEST VIRGINIA RADIO CORPORATION WHYY, INC. WICOMICO BOARD OF EDUCATION Warrenton Fauquier Joint Communications Washington Gas Light Company Western PA Internet Access, Inc. York County York County Dept of Emergency Services E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } 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. E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } Page 8 of 12

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 09/28/2010 Job Number: 100922COMSJC03 Administrative Information Status ENGINEER PROPOSAL Call Sign E020288 Licensee Code SWSITE Licensee Name Globecomm Systems, Inc. Site Information LAUREL, MARYLAND Venue Name Latitude (NAD 83) 39° 6' 47.0" N Longitude (NAD 83) 76° 49' 53.0" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 73.15 m / 240.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 15° W to 143° West Longitude Azimuth Range 108.7° to 254.4° Corresponding Elevation Angles 13.0° / 9.7° Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Information Receive Transmit Manufacturer Andrew Corporation Andrew Corporation Model 5.6 Meter 5.6 Meter Gain / Diameter 55.7 dBi / 5.6 m 57.1 dBi / 5.6 m 3-dB / 15-dB Beamwidth 0.40° / 0.80° 0.20° / 0.60° Max Available RF Power (dBW/4 kHz) -14.0 (dBW/MHz) 10.0 Maximum EIRP (dBW/4 kHz) 43.1 (dBW/MHz) 67.1 Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -144.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Frequency Information Receive 11.0 GHz Transmit 14.0 GHz Emission / Frequency Range (MHz) 578KG7W - 36M0G7W / 10950.0 - 11200.0 578KG7W - 36M0G7W / 13750.0 - 14500.0 578KG7W - 36M0G7W / 11450.0 - 12200.0 Max Great Circle Coordination Distance 356.5 km / 221.5 mi 167.8 km / 104.3 mi Precipitation Scatter Contour Radius 542.3 km / 336.9 mi 100.0 km / 62.1 mi E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } 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 LAUREL, MD Licensee Name Globecomm Systems, Inc. Latitude (NAD 83) 39° 6' 47.0" N Longitude (NAD 83) 76° 49' 53.0" W Ground Elevation (AMSL) 73.15 m / 240.0 ft Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Model Andrew Corporation 5.6 Meter Antenna Mode Receive 11.0 GHz Transmit 14.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -144.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Max Available RF Power -14.0 (dBW/4 kHz) Receive 11.0 GHz Transmit 14.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 0.35 105.36 -10.00 208.88 -10.00 103.93 5 0.35 103.33 -10.00 209.18 -10.00 104.20 10 0.29 98.45 -10.00 214.19 -10.00 108.54 15 0.27 93.58 -10.00 216.67 -10.00 110.64 20 0.21 88.70 -10.00 222.25 -10.00 115.29 25 0.25 83.83 -10.00 217.84 -10.00 111.63 30 0.00 78.96 -10.00 222.88 -10.00 115.80 35 0.00 74.10 -10.00 222.88 -10.00 115.80 40 0.00 69.24 -10.00 222.88 -10.00 115.80 45 0.00 64.39 -10.00 222.88 -10.00 115.80 50 0.00 59.56 -10.00 222.88 -10.00 115.80 55 0.00 54.74 -10.00 222.88 -10.00 115.80 60 0.00 49.95 -10.00 222.88 -10.00 115.80 65 0.00 45.19 -9.38 225.48 -9.38 117.36 70 0.00 40.47 -8.18 230.59 -8.18 120.36 75 0.00 35.82 -6.85 236.46 -6.85 123.72 80 0.00 31.25 -5.37 243.25 -5.37 127.51 85 0.00 26.83 -3.71 251.29 -3.71 130.56 90 0.00 22.62 -1.86 260.49 -1.86 135.67 95 0.00 18.79 0.15 270.94 0.15 141.70 100 0.00 15.59 2.18 281.86 2.18 148.24 105 0.00 13.51 3.73 290.57 3.73 153.61 110 0.00 13.08 4.09 292.58 4.09 154.87 115 0.00 14.45 3.01 286.47 3.01 151.07 120 0.00 17.19 1.12 276.08 1.12 144.76 125 0.00 20.67 -0.88 265.51 -0.88 138.54 130 0.30 23.90 -2.46 246.74 -2.46 126.77 135 0.00 27.43 -3.96 250.12 -3.96 129.93 140 0.00 30.58 -5.14 244.49 -5.14 128.11 145 0.00 33.53 -6.13 239.72 -6.13 125.55 150 0.00 36.23 -6.98 235.89 -6.98 123.40 155 0.00 38.65 -7.68 232.77 -7.68 121.62 160 0.00 40.74 -8.25 230.28 -8.25 120.18 165 0.00 42.43 -8.69 228.37 -8.69 119.07 170 0.00 43.69 -9.01 227.03 -9.01 118.28 175 0.00 44.46 -9.20 226.22 -9.20 117.80 180 0.00 44.72 -9.26 225.95 -9.26 117.64 185 0.00 44.46 -9.20 226.22 -9.20 117.80 E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } 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 LAUREL, MD Licensee Name Globecomm Systems, Inc. Latitude (NAD 83) 39° 6' 47.0" N Longitude (NAD 83) 76° 49' 53.0" W Ground Elevation (AMSL) 73.15 m / 240.0 ft Antenna Centerline (AGL) 3.66 m / 12.0 ft Antenna Model Andrew Corporation 5.6 Meter Antenna Mode Receive 11.0 GHz Transmit 14.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -144.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Max Available RF Power -14.0 (dBW/4 kHz) Receive 11.0 GHz Transmit 14.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.00 43.69 -9.01 227.02 -9.01 118.27 195 0.00 42.43 -8.69 228.38 -8.69 119.07 200 0.00 40.74 -8.25 230.28 -8.25 120.18 205 0.00 38.65 -7.68 232.77 -7.68 121.62 210 0.00 36.23 -6.98 235.89 -6.98 123.40 215 0.00 33.53 -6.14 239.72 -6.14 125.55 220 0.00 30.58 -5.14 244.49 -5.14 128.12 225 0.00 27.43 -3.96 250.12 -3.96 129.92 230 0.00 24.12 -2.56 256.99 -2.56 133.70 235 0.00 20.67 -0.88 265.50 -0.88 138.54 240 0.00 17.11 1.17 276.35 1.17 144.92 245 0.25 13.32 3.89 286.10 3.89 149.18 250 0.29 10.39 6.58 294.53 6.58 154.83 255 0.43 9.28 7.81 356.51 7.81 167.80 260 0.43 10.80 6.16 280.12 6.16 139.99 265 0.48 13.99 3.35 259.11 3.35 128.64 270 0.45 18.05 0.59 247.84 0.59 123.60 275 0.41 22.49 -1.80 239.82 -1.80 120.53 280 0.45 27.09 -3.82 226.67 -3.82 112.35 285 0.48 31.80 -5.56 215.80 -5.56 105.22 290 0.39 36.62 -7.09 217.81 -7.09 108.66 295 0.45 41.43 -8.43 206.62 -8.43 100.30 300 0.64 46.27 -9.63 193.30 -9.63 100.00 305 0.57 51.17 -10.00 195.63 -10.00 100.00 310 0.46 56.08 -10.00 202.75 -10.00 100.00 315 0.40 61.00 -10.00 205.08 -10.00 100.55 320 0.49 65.91 -10.00 200.27 -10.00 100.00 325 0.61 70.83 -10.00 193.35 -10.00 100.00 330 0.62 75.76 -10.00 193.11 -10.00 100.00 335 0.47 80.70 -10.00 201.51 -10.00 100.00 340 0.55 85.63 -10.00 196.42 -10.00 100.00 345 0.44 90.57 -10.00 204.31 -10.00 100.00 350 0.37 95.50 -10.00 207.17 -10.00 102.43 355 0.33 100.43 -10.00 210.54 -10.00 105.39 E020288 Frequency Coord. Exh. A 10/13/2010 (00222702).RTF09/29/2010 {00222702-1 } Page 11 of 12

5. CER RTIFICAT TION I HEREBY CERTIFY THAT T I AM THE T TECHNIC CALLY QUAALIFIED PERS SON RESPO ONSIBLE FOR THE PREPARAT TION OF TH HE FREQUENCY COORD DINATION DATA D CONTAAINED IN TH HIS APPLICA ATION, M FAMILIAR WITH PART THAT I AM TS 101 AND 25 OF THE FCC RULES S AND REGUULATIONS, THAT T I HAVE EITHER PREPA ARED OR REVIEWED THE FREQUE ENCY COOR RDINATION DATA D SUBM MITTED WITH THISS APPLICAT TION, AND THAT T IT IS COMPLETEE AND COR RRECT TO THE T BEST OF O MY KNOWLED DGE AND BELIEF. Jeffrey E. Cowles C Engineer III, Telecommuunications COMSEAR RCH 19700 Jane elia Farm Bou ulevard Ashburn, Va. V 20147 eptember 29, 2010 DATED: Se E0 {00222702-1 }020288 Frequ uency Coord. Exh. A 10/13 3/2010 (00222 2702).RTF09//29/2010 Page 12 of o 12


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Document Modified: 2010-10-13 10:50:12
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