Attachment FCC_mangilrev.pdf

This document pretains to SES-REG-20110519-00605 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREG2011051900605_889940

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Guam Educational Telecommunications Corp. Mangilao, Guam Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 October 12, 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 10/12/2010 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 10/12/2010 Page 3 of 10

2. SUMMARY OF RESULTS No great circle interference cases were identified during the interference study of the proposed earth station. There were no 4 GHz terrestrial paths identified within the coordination contours of the proposed earth station site. Frequency Coordination and Interference Analysis Report 10/12/2010 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. A minor revision letter for this earth station was sent to the below listed carriers with a letter dated October 12, 2010. Company Comsearch Frequency Coordination and Interference Analysis Report 10/12/2010 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 10/12/2010 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 10/12/2010 Job Number: 101012COMSJC02 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code S89375 Licensee Name GUAM EDUCATIONAL TELECOMMUNICATIONS CORP Site Information MANGILAO, GUAM Venue Name Latitude (NAD 83) 13° 26' 17.5" N Longitude (NAD 83) 144° 48' 24.9" E Climate Zone B Rain Zone 4 Ground Elevation (AMSL) 85.95 m / 282.0 ft Link Information Satellite Type Geostationary Mode RO - Receive-Only Modulation Digital Satellite Arc 140° W to 290° West Longitude Azimuth Range 93.5° to 266.4° Corresponding Elevation Angles 5.7° / 6.1° Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Information Receive Manufacturer Patriot Ant Systems Model 4.5 Meter Gain / Diameter 44.7 dBi / 4.5 m 3-dB / 15-dB Beamwidth 1.00° / 1.86° Interference Objectives: Long Term -156.0 dBW/MHz 20% Short Term -146.0 dBW/MHz 0.01% Frequency Information Receive 4.0 GHz Emission / Frequency Range (MHz) 2M00G7W - 36M0G7W / 3700.0 - 4200.0 Max Great Circle Coordination Distance 805.9 km / 500.7 mi Precipitation Scatter Contour Radius 424.7 km / 263.9 mi Frequency Coordination and Interference Analysis Report 10/12/2010 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 MANGILAO, GU Licensee Name GUAM EDUCATIONAL TELECOMMUNICATIONS CORP Latitude (NAD 83) 13° 26' 17.5" N Longitude (NAD 83) 144° 48' 24.9" E Ground Elevation (AMSL) 85.95 m / 282.0 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Patriot Ant. Systems 4.5 Meter Antenna Mode Receive 4.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% Short Term -146.0 dBW/MHz 0.01% Receive 4.0 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 0 2.87 93.51 -10.00 168.56 5 3.07 88.52 -10.00 162.72 10 3.07 83.52 -10.00 162.75 15 3.38 78.53 -10.00 154.74 20 3.38 73.53 -10.00 154.72 25 3.38 68.53 -10.00 154.74 30 3.54 63.54 -10.00 150.64 35 3.54 58.54 -10.00 150.67 40 3.54 53.55 -10.00 150.67 45 2.51 48.60 -10.00 180.92 50 2.51 43.61 -8.99 186.61 55 2.51 38.63 -7.67 194.31 60 1.43 33.76 -6.21 256.07 65 0.00 29.04 -4.57 484.79 70 0.00 24.17 -2.58 514.89 75 0.00 19.35 -0.17 553.66 80 0.00 14.66 2.85 605.84 85 0.00 10.25 6.73 678.59 90 0.00 6.72 11.31 774.93 95 0.00 5.92 12.69 805.92 100 0.00 8.65 8.58 716.20 105 0.00 12.82 4.30 631.90 110 0.00 17.43 0.97 572.88 115 0.00 22.20 -1.66 529.39 120 0.00 27.02 -3.79 496.36 125 0.00 31.82 -5.57 470.46 130 0.00 36.60 -7.09 450.02 135 0.00 41.35 -8.41 432.41 140 0.00 46.05 -9.58 417.45 145 0.00 50.68 -10.00 412.20 150 0.00 55.23 -10.00 412.20 155 0.00 59.65 -10.00 412.20 160 0.00 63.85 -10.00 412.20 165 0.00 67.72 -10.00 412.20 170 0.00 71.01 -10.00 412.20 175 0.00 73.34 -10.00 412.20 180 0.00 74.20 -10.00 412.20 185 0.00 73.34 -10.00 412.20 Frequency Coordination and Interference Analysis Report 10/12/2010 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 MANGILAO, GU Licensee Name GUAM EDUCATIONAL TELECOMMUNICATIONS CORP Latitude (NAD 83) 13° 26' 17.5" N Longitude (NAD 83) 144° 48' 24.9" E Ground Elevation (AMSL) 85.95 m / 282.0 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Patriot Ant. Systems 4.5 Meter Antenna Mode Receive 4.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% Short Term -146.0 dBW/MHz 0.01% Receive 4.0 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 190 0.00 71.01 -10.00 412.20 195 0.00 67.72 -10.00 412.20 200 0.00 63.85 -10.00 412.20 205 1.93 59.09 -10.00 202.93 210 1.93 54.70 -10.00 202.95 215 1.93 50.17 -10.00 202.94 220 3.30 45.19 -9.37 159.66 225 3.37 40.48 -8.18 163.56 230 3.37 35.75 -6.83 170.44 235 3.37 30.98 -5.28 178.80 240 2.11 26.50 -3.58 237.20 245 2.11 21.69 -1.41 253.19 250 2.11 16.86 1.33 272.64 255 1.58 12.25 4.80 341.22 260 1.58 7.83 9.65 394.05 265 1.17 5.15 14.21 501.51 270 1.17 6.13 12.31 472.91 275 1.17 9.93 7.08 402.85 280 0.97 14.54 2.94 375.29 285 0.97 19.29 -0.13 343.54 290 0.99 24.14 -2.57 316.83 295 0.99 29.03 -4.57 298.24 300 0.99 33.96 -6.27 283.42 305 1.58 38.84 -7.73 236.32 310 1.58 43.80 -9.04 227.28 315 1.58 48.77 -10.00 220.81 320 1.93 53.73 -10.00 202.76 325 2.19 58.70 -10.00 192.35 330 2.19 63.68 -10.00 192.32 335 2.19 68.67 -10.00 192.33 340 2.40 73.65 -10.00 184.77 345 2.40 78.64 -10.00 184.78 350 2.87 83.62 -10.00 168.59 355 2.87 88.62 -10.00 168.56 Frequency Coordination and Interference Analysis Report 10/12/2010 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. Jeffrey E. Cowles Engineer III, Telecommunications COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Va. 20147 DATED: October 12, 2010 Frequency Coordination and Interference Analysis Report 10/12/2010 Page 10 of 10


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Document Modified: 2019-05-25 18:51:58
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