Attachment Exhibit A

This document pretains to SES-MOD-20100617-00709 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010061700709_823100

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Denali 20020, LLC BREWSTER, WA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 June 17, 2010

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 06/17/2010 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 06/17/2010 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 WASHINGTON STATE DOT Time Warner Cable LLC QWEST CORPORATION Washington State Patrol MULTI AGENCY COMMUNICATIONS CTR E911 Verizon Wireless (VAW) LLC - (WA) VERIZON NORTHWEST INC.-FRONTIER No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 06/17/2010 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 05/17/2010. Company AT&T COMMUNICATIONS OF PACIFIC NORTHWEST BNSF Railway Company Boeing Company CenturyTel of Cowiche, Inc. CenturyTel of Washington, Inc. City of Seattle City of Tacoma / Tacoma Public Utilities Confederated Tribes of the Colville Res. Eastern Sub-RSA Limited Partnership Eastside Public Safety Com Agency International Communications Group, Inc. KING COUNTY DEPT OF TRANSPORTATION King, County of METROPOLITAN AREA NETWORKS, INC. MTS Allstream Inc MULTI AGENCY COMMUNICATIONS CTR E911 New Cingular Wireless PCS -AK,WA,OR, NID Noel Communications, Inc North East Washington Microwave Northwest Microwave Inc. PACIFIC WIRELESS SYSTEMS LLC PIERCE, COUNTY OF PUYALLUP, CITY OF PocketiNet Communications Inc. Puget Sound Energy QWEST CORPORATION SPOKANE COUNTY Seattle SMSA Limited Partnership Snohomish County Pub.Trans.Benefit Area Sprint Communications Co., LP Startouch, Inc. TELUS COMMUNICATIONS,(B.C.)INC. THURSTON, COUNTY OF Tacoma, City of Time Warner Cable LLC USCOC of Richland, Inc. Union Pacific Railroad Company VERIZON NORTHWEST INC.-FRONTIER Verizon Wireless (VAW) LLC - (WA) WASHINGTON STATE - MILITARY DEPT Frequency Coordination and Interference Analysis Report 06/17/2010 Page 5 of 11

WASHINGTON STATE DOT Washington RSA No. 8 Limited Partnership Washington State Patrol Western Sub-RSA LTD Partnership Yakima MSA Limited Partnership Frequency Coordination and Interference Analysis Report 06/17/2010 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 06/17/2010 Page 7 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 06/17/2010 Job Number: 100517COMSGE03 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code DENALI Licensee Name Denali 20020, LLC Site Information BREWSTER, WA Venue Name Latitude (NAD 83) 48° 8' 50.0" N Longitude (NAD 83) 119° 41' 28.0" W Climate Zone A Rain Zone 5 Ground Elevation (AMSL) 377.0 m / 1236.9 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 53° W to 186° West Longitude Azimuth Range 107.8° to 251.9° Corresponding Elevation Angles 6.7° / 6.9° Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Vertex Vertex Model 11 Meter 11 Meter Gain / Diameter 51.9 dBi / 11.0 m 55.4 dBi / 11.0 m 3-dB / 15-dB Beamwidth 0.90° / 1.80° 0.60° / 1.20° Max Available RF Power (dBW/4 kHz) 1.1 (dBW/MHz) 25.1 Maximum EIRP (dBW/4 kHz) 56.5 (dBW/MHz) 80.5 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) 2M40G7D - 36M0G7F / 3700.0 - 4200.0 2M40G7D - 36M0G7F / 5925.0 - 6425.0 36M0F3F / 3700.0 - 4200.0 36M0F3F / 5925.0 - 6425.0 Max Great Circle Coordination Distance 533.7 km / 331.6 mi 335.6 km / 208.5 mi Precipitation Scatter Contour Radius 448.7 km / 278.8 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 06/17/2010 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 BREWSTER, WA Licensee Name Denali 20020, LLC Latitude (NAD 83) 48° 8' 50.0" N Longitude (NAD 83) 119° 41' 28.0" W Ground Elevation (AMSL) 377.0 m / 1236.9 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model Vertex 11 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 1.1 (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 1.15 107.71 -10.00 215.68 -10.00 125.26 5 1.07 102.73 -10.00 218.12 -10.00 127.34 10 0.72 97.75 -10.00 236.14 -10.00 140.88 15 1.36 92.78 -10.00 209.60 -10.00 119.92 20 1.70 87.80 -10.00 202.65 -10.00 111.28 25 0.60 82.84 -10.00 243.56 -10.00 147.18 30 0.58 77.87 -10.00 244.45 -10.00 147.94 35 0.79 72.89 -10.00 232.19 -10.00 137.60 40 1.22 67.90 -10.00 213.66 -10.00 123.51 45 1.56 62.91 -10.00 206.28 -10.00 114.66 50 1.61 57.94 -10.00 205.11 -10.00 113.57 55 1.88 52.95 -10.00 197.71 -10.00 106.74 60 1.83 47.98 -10.00 199.08 -10.00 107.99 65 2.13 42.99 -8.83 197.02 -8.83 105.08 70 2.18 38.02 -7.50 202.12 -7.50 108.70 75 2.44 33.04 -5.97 203.81 -5.97 109.12 80 2.63 28.06 -4.20 205.75 -4.20 111.81 85 2.60 23.14 -2.11 217.29 -2.11 120.27 90 2.74 18.21 0.49 229.06 0.49 127.58 95 2.91 13.33 3.88 247.17 3.88 135.66 100 2.85 8.68 8.54 285.10 8.54 157.48 105 2.46 5.05 14.41 348.69 14.41 197.65 110 2.27 4.92 14.71 484.32 14.71 296.43 115 2.21 7.97 9.46 312.83 9.46 179.00 120 2.60 10.71 6.26 273.84 6.26 152.27 125 2.73 13.53 3.72 250.94 3.72 138.49 130 1.93 17.00 1.24 256.14 1.24 145.47 135 1.11 20.36 -0.72 272.26 -0.72 160.69 140 0.47 23.43 -2.24 303.79 -2.24 189.63 145 0.32 25.90 -3.33 316.23 -3.33 199.81 150 0.00 28.30 -4.30 324.71 -4.30 205.58 155 0.00 30.17 -4.99 319.75 -4.99 204.56 160 0.00 31.76 -5.55 315.81 -5.55 202.44 165 0.00 33.03 -5.97 312.82 -5.97 200.82 170 0.00 33.96 -6.27 310.10 -6.27 199.67 175 0.00 34.52 -6.45 308.85 -6.45 198.98 180 0.00 34.71 -6.51 308.43 -6.51 198.76 185 0.00 34.52 -6.45 308.85 -6.45 198.98 Frequency Coordination and Interference Analysis Report 06/17/2010 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 BREWSTER, WA Licensee Name Denali 20020, LLC Latitude (NAD 83) 48° 8' 50.0" N Longitude (NAD 83) 119° 41' 28.0" W Ground Elevation (AMSL) 377.0 m / 1236.9 ft Antenna Centerline (AGL) 5.49 m / 18.0 ft Antenna Model Vertex 11 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 1.1 (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 33.96 -6.27 310.09 -6.27 199.67 195 0.00 33.03 -5.97 312.82 -5.97 200.82 200 0.00 31.76 -5.55 315.81 -5.55 202.44 205 0.00 30.18 -4.99 319.74 -4.99 204.55 210 0.00 28.30 -4.30 324.71 -4.30 205.58 215 0.00 26.18 -3.45 330.84 -3.45 208.87 220 0.00 23.84 -2.43 338.31 -2.43 212.94 225 0.00 21.29 -1.20 347.46 -1.20 218.00 230 0.00 18.59 0.27 358.68 0.27 224.34 235 0.00 15.73 2.08 372.78 2.08 232.46 240 0.00 12.76 4.35 390.35 4.35 243.21 245 0.38 9.41 7.67 394.28 7.67 240.55 250 0.40 6.78 11.22 533.71 11.22 335.56 255 2.14 5.69 13.12 347.09 13.12 198.50 260 1.65 9.65 7.38 315.36 7.38 184.16 265 2.53 13.80 3.50 254.77 3.50 141.58 270 3.18 18.47 0.34 217.81 0.34 118.94 275 3.33 23.36 -2.21 203.55 -2.21 106.30 280 3.30 28.31 -4.30 193.73 -4.30 100.00 285 3.20 33.29 -6.06 187.05 -6.06 100.00 290 2.79 38.29 -7.58 188.42 -7.58 100.00 295 1.55 43.37 -8.93 209.09 -8.93 118.46 300 2.01 48.29 -10.00 194.33 -10.00 103.70 305 2.12 53.25 -10.00 191.68 -10.00 101.34 310 1.84 58.24 -10.00 198.86 -10.00 107.78 315 2.17 63.20 -10.00 190.74 -10.00 100.52 320 2.19 68.18 -10.00 190.25 -10.00 100.09 325 1.97 73.17 -10.00 195.20 -10.00 104.48 330 2.04 78.15 -10.00 193.68 -10.00 103.12 335 1.63 83.13 -10.00 204.49 -10.00 112.98 340 1.18 88.11 -10.00 214.90 -10.00 124.59 345 0.47 93.08 -10.00 252.83 -10.00 155.16 350 0.00 98.04 -10.00 285.28 -10.00 185.38 355 0.00 103.00 -10.00 285.28 -10.00 185.38 Frequency Coordination and Interference Analysis Report 06/17/2010 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: June 17, 2010 Frequency Coordination and Interference Analysis Report 06/17/2010 Page 11 of 11


Document Created: 2010-06-17 10:04:22
Document Modified: 2010-06-17 10:04:22
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