Attachment Freq Coord

This document pretains to SES-STA-20090602-00674 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2009060200674_722696

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT TEMPORAY TRANSMIT ONLY EARTH STATION OPERATION DATES: 7/14/2009 – 01/14/2010 Prepared for CAPROCK COMMUNICATIONS CORP. NEW ORLEANS, LA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 July 14, 2009 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. 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. There are no unresolved interference cases involving this earth station. Frequency Coordination and Interference Analysis Report 07/14/2009 Page 1 of 6

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. Verabal and written coordination for this earth station was conducted with the below listed carriers on 07/14/2009. Company Acadiana Cellular General Partnership Bell Atlantic Mobile Allentown-Verizon W Cellular South Licenses, Inc. Cleco Power LLC ERF Enterprise Network Services East Ascension Telephone Company Exxon Communications Company Federal Communications Commission Greater Lafourche Port Commission Jefferson Parish Sheriff's Office LOUISIANA STATE COMMUNICATION SECTION Louisiana Dept. of Transportation and De Louisiana RSA #7 Cell Gen Partnership Louisiana, State Of MCI Communication Services, Inc. METROPOLITAN AREA NETWORKS, INC. NEW ORLEANS EDUCATIONAL TELECOMM New Cingular Wireless PCS, LLC - LA PATHNET, INC. - DEBTOR IN POSSESSION Plaquemines Parish Government Sprint Spectrum LP Louisiana Stratos Offshore Services Company Verizon Wireless Personal Comm., LP Frequency Coordination and Interference Analysis Report 07/14/2009 Page 2 of 6

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. Timothy O. Crutcher Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: July 14, 2009 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 07/14/2009 Page 3 of 6

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5665 http://www.comsearch.com Date: 07/14/2009 Job Number: 090714COMSTC04 Administrative Information Status TEMPORARY (Operation from 07/17/2009 to 01/17/2010) Licensee Name CAPROCK COMMUNICATIONS CORP. Site Information NEW ORLEANS, LA Latitude (NAD 83) 28° 58' 25.5" N Longitude (NAD 83) 90° 17' 52.3" W Climate Zone B Rain Zone 1 Ground Elevation (AMSL) 0.0 m / 0.0 ft Link Information Satellite Type Geostationary Mode TO - Transmit-Only Modulation Digital Satellite Arc 53° W to 53° West Longitude Azimuth Range 122.5° to 122.5° Corresponding Elevation Angles 37.2° / 37.2° Antenna Centerline (AGL) 0.91 m / 3.0 ft Antenna Information Transmit Manufacturer SEATEL 9797 Gain / Diameter 41.1 dBi / 2.4 m 3-dB / 15-dB Beamwidth 1.00° / 2.00° Max Available RF Power (dBW/4 kHz) -8.3 (dBW/MHz) 15.7 Maximum EIRP (dBW/4 kHz) 32.8 (dBW/MHz) 56.8 Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Frequency Information Transmit 6.1 GHz Emission / Frequency Range (MHz) 200KG7W / 5925.0 - 6048.0 200KG7W / 6109.0 - 6300.5 200KG7W / 6331.0 - 6389.5 200KG7W / 6420.0 - 6425.0 Max Great Circle Coordination Distance 184.6 km / 114.7 mi Precipitation Scatter Contour Radius 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 07/14/2009 Page 4 of 6

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5665 http://www.comsearch.com Coordination Values NEW ORLEANS, LA Licensee Name CAPROCK COMMUNICATIONS CORP. Latitude (NAD 83) 28° 58' 25.5" N Longitude (NAD 83) 90° 17' 52.3" W Ground Elevation (AMSL) 0.0 m / 0.0 ft Antenna Centerline (AGL) 0.91 m / 3.0 ft Antenna Mode Transmit 6.1 GHz Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Max Available RF Power -8.3 (dBW/4 kHz) Transmit 6.1 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 0 0.00 115.31 -10.00 170.86 5 0.00 111.55 -10.00 170.86 10 0.00 107.72 -10.00 170.86 15 0.00 103.83 -10.00 170.86 20 0.00 99.89 -10.00 170.86 25 0.00 95.93 -10.00 170.86 30 0.00 91.96 -10.00 170.86 35 0.00 87.97 -10.00 170.86 40 0.00 84.00 -10.00 170.86 45 0.00 80.04 -10.00 170.86 50 0.00 76.10 -10.00 170.86 55 0.00 72.21 -10.00 170.86 60 0.00 68.38 -10.00 170.86 65 0.00 64.62 -10.00 170.86 70 0.00 60.95 -10.00 170.86 75 0.00 57.40 -10.00 170.86 80 0.00 54.00 -10.00 170.86 85 0.00 50.77 -10.00 170.86 90 0.00 47.76 -9.98 170.97 95 0.00 45.01 -9.33 174.12 100 0.00 42.58 -8.73 177.12 105 0.00 40.53 -8.20 179.83 110 0.00 38.93 -7.76 182.10 115 0.00 37.82 -7.44 183.73 120 0.00 37.25 -7.28 184.59 125 0.00 37.26 -7.28 184.58 130 0.00 37.83 -7.45 183.71 135 0.00 38.95 -7.76 182.06 140 0.00 40.57 -8.20 179.79 145 0.00 42.62 -8.74 177.06 150 0.00 45.06 -9.34 174.06 155 0.00 47.81 -9.99 170.92 160 0.00 50.82 -10.00 170.86 165 0.00 54.06 -10.00 170.86 170 0.00 57.47 -10.00 170.86 175 0.00 61.02 -10.00 170.86 180 0.00 64.69 -10.00 170.86 185 0.00 68.45 -10.00 170.86 Frequency Coordination and Interference Analysis Report 07/14/2009 Page 5 of 6

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5665 http://www.comsearch.com Coordination Values NEW ORLEANS, LA Licensee Name CAPROCK COMMUNICATIONS CORP. Latitude (NAD 83) 28° 58' 25.5" N Longitude (NAD 83) 90° 17' 52.3" W Ground Elevation (AMSL) 0.0 m / 0.0 ft Antenna Centerline (AGL) 0.91 m / 3.0 ft Antenna Mode Transmit 6.1 GHz Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Max Available RF Power -8.3 (dBW/4 kHz) Transmit 6.1 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 190 0.00 72.28 -10.00 170.86 195 0.00 76.17 -10.00 170.86 200 0.00 80.11 -10.00 170.86 205 0.00 84.07 -10.00 170.86 210 0.00 88.04 -10.00 170.86 215 0.00 92.03 -10.00 170.86 220 0.00 96.00 -10.00 170.86 225 0.00 99.96 -10.00 170.86 230 0.00 103.90 -10.00 170.86 235 0.00 107.79 -10.00 170.86 240 0.00 111.62 -10.00 170.86 245 0.00 115.38 -10.00 170.86 250 0.00 119.05 -10.00 170.86 255 0.00 122.60 -10.00 170.86 260 0.00 126.00 -10.00 170.86 265 0.00 129.23 -10.00 170.86 270 0.00 132.24 -10.00 170.86 275 0.00 134.99 -10.00 170.86 280 0.00 137.42 -10.00 170.86 285 0.00 139.47 -10.00 170.86 290 0.00 141.07 -10.00 170.86 295 0.00 142.18 -10.00 170.86 300 0.00 142.75 -10.00 170.86 305 0.00 142.74 -10.00 170.86 310 0.00 142.17 -10.00 170.86 315 0.00 141.05 -10.00 170.86 320 0.00 139.43 -10.00 170.86 325 0.00 137.38 -10.00 170.86 330 0.00 134.94 -10.00 170.86 335 0.00 132.19 -10.00 170.86 340 0.00 129.18 -10.00 170.86 345 0.00 125.94 -10.00 170.86 350 0.00 122.53 -10.00 170.86 355 0.00 118.98 -10.00 170.86 Frequency Coordination and Interference Analysis Report 07/14/2009 Page 6 of 6


Document Created: 2009-07-16 12:34:23
Document Modified: 2009-07-16 12:34:23
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