Attachment Coordination report

This document pretains to SES-REG-INTR2018-02460 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREGINTR201802460_1416936

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Darien Communications Inc DARIEN, GA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 June 06, 2018

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 06/06/2018 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 06/06/2018 Page 3 of 11

2. SUMMARY OF RESULTS No great circle interference cases were identified during the interference study of the proposed earth station. Frequency Coordination and Interference Analysis Report 06/06/2018 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 06/06/2018. Company Comsearch Frequency Coordination and Interference Analysis Report 06/06/2018 Page 5 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 06/06/2018 Page 6 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 06/06/2018 Job Number: 180606COMSGE09 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code DARICO Licensee Name Darien Communications Inc Site Information DARIEN, GA Venue Name Latitude (NAD 83) 31° 24' 44.7" N Longitude (NAD 83) 81° 27' 18.4" W Climate Zone A Rain Zone 1 Ground Elevation (AMSL) 9.48 m / 31.1 ft Link Information Satellite Type Geostationary Mode RO - Receive-Only Modulation Analog Satellite Arc 60° W to 143° West Longitude Azimuth Range 143.0° to 254.2° Corresponding Elevation Angles 46.6° / 15.6° Antenna Centerline (AGL) 5.2 m / 17.1 ft Antenna Information Receive - FCC32 Manufacturer Scientific-Atlanta Model 9037 Gain / Diameter 41.5 dBi / 3.7 m 3-dB / 15-dB Beamwidth 1.00° / 2.00° 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) 36M0G7W / 3700.0 - 4200.0 Max Great Circle Coordination Distance 373.3 km / 231.9 mi Precipitation Scatter Contour Radius 596.1 km / 370.4 mi Frequency Coordination and Interference Analysis Report 06/06/2018 Page 7 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values DARIEN, GA Licensee Name Darien Communications Inc Latitude (NAD 83) 31° 24' 44.7" N Longitude (NAD 83) 81° 27' 18.4" W Ground Elevation (AMSL) 9.48 m / 31.1 ft Antenna Centerline (AGL) 5.2 m / 17.1 ft Antenna Model Scientific-Atlanta 3.7 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 0.00 105.18 -10.00 285.28 5 0.00 109.97 -10.00 285.28 10 0.00 114.76 -10.00 285.28 15 0.00 115.00 -10.00 285.28 20 0.00 111.95 -10.00 285.28 25 0.00 108.80 -10.00 285.28 30 0.00 105.55 -10.00 285.28 35 0.00 102.24 -10.00 285.28 40 0.00 98.88 -10.00 285.28 45 0.00 95.47 -10.00 285.28 50 0.00 92.05 -10.00 285.28 55 0.00 88.62 -10.00 285.28 60 0.00 85.19 -10.00 285.28 65 0.00 81.78 -10.00 285.28 70 0.00 78.41 -10.00 285.28 75 0.00 75.08 -10.00 285.28 80 0.00 71.82 -10.00 285.28 85 0.00 68.65 -10.00 285.28 90 0.00 65.58 -10.00 285.28 95 0.00 62.64 -10.00 285.28 100 0.00 59.84 -10.00 285.28 105 0.00 57.23 -10.00 285.28 110 0.00 54.83 -10.00 285.28 115 0.00 52.67 -10.00 285.28 120 0.00 50.79 -10.00 285.28 125 0.00 49.22 -10.00 285.28 130 0.00 48.00 -10.00 285.28 135 0.00 47.15 -9.84 286.32 140 0.00 46.70 -9.73 286.98 145 0.00 46.66 -9.72 287.04 150 0.00 47.03 -9.81 286.49 155 0.00 47.80 -9.99 285.37 160 0.00 48.95 -10.00 285.28 165 0.00 50.46 -10.00 285.28 170 0.00 52.05 -10.00 285.28 175 0.00 53.07 -10.00 285.28 180 0.00 53.42 -10.00 285.28 185 0.00 53.07 -10.00 285.28 Frequency Coordination and Interference Analysis Report 06/06/2018 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 DARIEN, GA Licensee Name Darien Communications Inc Latitude (NAD 83) 31° 24' 44.7" N Longitude (NAD 83) 81° 27' 18.4" W Ground Elevation (AMSL) 9.48 m / 31.1 ft Antenna Centerline (AGL) 5.2 m / 17.1 ft Antenna Model Scientific-Atlanta 3.7 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 52.06 -10.00 285.28 195 0.00 50.42 -10.00 285.28 200 0.00 48.26 -10.00 285.28 205 0.00 45.66 -9.49 288.55 210 0.00 42.70 -8.76 293.29 215 0.00 39.44 -7.90 298.99 220 0.00 35.96 -6.89 305.80 225 0.00 32.29 -5.73 314.54 230 0.00 28.48 -4.36 324.23 235 0.00 24.58 -2.77 335.84 240 0.00 21.01 -1.06 348.56 245 0.00 18.08 0.57 360.98 250 0.00 16.17 1.78 370.45 255 0.00 15.64 2.15 373.29 260 0.00 16.63 1.48 368.06 265 0.00 18.90 0.09 357.29 270 0.00 22.06 -1.59 344.57 275 0.00 25.78 -3.28 332.05 280 0.00 29.86 -4.88 320.56 285 0.00 34.16 -6.34 309.64 290 0.00 38.61 -7.67 300.54 295 0.00 43.17 -8.88 292.51 300 0.00 47.80 -9.99 285.37 305 0.00 52.48 -10.00 285.28 310 0.00 57.20 -10.00 285.28 315 0.00 61.95 -10.00 285.28 320 0.00 66.72 -10.00 285.28 325 0.00 71.51 -10.00 285.28 330 0.00 76.31 -10.00 285.28 335 0.00 81.12 -10.00 285.28 340 0.00 85.93 -10.00 285.28 345 0.00 90.75 -10.00 285.28 350 0.00 95.56 -10.00 285.28 355 0.00 100.37 -10.00 285.28 Frequency Coordination and Interference Analysis Report 06/06/2018 Page 9 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 06, 2018 Frequency Coordination and Interference Analysis Report 06/06/2018 Page 10 of 11

Frequency Coordination Waiver Per FCC DA 18-398, the Applicant understands that the requirement for Frequency Coordination has been waived during the 90-day Freeze Order and therefore no Frequency Coordination report will be presented for any antennas presented with this Application for Registration of a C-band receive/only earth station operating in the 3700 – 4200 MHz receive band, with the exception of the 3.7 meter Scientific-Atlanta referenced previously in this document, that was coordinated. The applicant understands that frequency coordination may be required at a later date as referenced in FCC DA 18-398 and will provide a coordination report at that time if requested. Frequency Coordination and Interference Analysis Report 06/06/2018 Page 11 of 11


Document Created: 2018-06-08 15:22:47
Document Modified: 2018-06-08 15:22:47
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