Attachment CoordinationReport

This document pretains to SES-REG-20180525-00960 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREG2018052500960_1404280

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Robert Louis Stevenson School PEBBLE BEACH, CA Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 May 25, 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 05/25/2018 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 05/25/2018 Page 3 of 10

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. No carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 05/25/2018 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. Coordination data for this earth station was sent to the below listed carriers with a letter dated 05/25/2018. Company American Tower, LLC Pacific Bell Tel Com dba AT&T California Frequency Coordination and Interference Analysis Report 05/25/2018 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 05/25/2018 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 05/25/2018 Job Number: 180525COMSTC06 Administrative Information Licensee Code RLSHS Licensee Name Robert Louis Stevenson School Site Information PEBBLE BEACH, CA Venue Name KSPB Latitude (NAD 83) 36° 34' 48.0" N Longitude (NAD 83) 121° 57' 0.0" W Climate Zone A Rain Zone 4 Ground Elevation (AMSL) 86.0 m / 282.2 ft Link Information Satellite Type Geostationary Mode RO - Receive-Only Modulation Digital Satellite Arc 58° W to 143° West Longitude Azimuth Range 106.2° to 212.9° Corresponding Elevation Angles 12.1° / 42.1° Antenna Centerline (AGL) 8.84 m / 29.0 ft Antenna Information Receive - F40501 Manufacturer ANT FOR COMM Model PR 16.4 Gain / Diameter 44.0 dBi / 5.0 m 3-dB / 15-dB Beamwidth 1.10° / 2.20° 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) 30K0G7W - 36M0G7W / 3700.0 - 4200.0 30K0G3W - 36M0G3W / 3700.0 - 4200.0 Max Great Circle Coordination Distance 288.9 km / 179.5 mi Precipitation Scatter Contour Radius 383.3 km / 238.2 mi Frequency Coordination and Interference Analysis Report 05/25/2018 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 PEBBLE BEACH, CA Licensee Name Robert Louis Stevenson School Latitude (NAD 83) 36° 34' 48.0" N Longitude (NAD 83) 121° 57' 0.0" W Ground Elevation (AMSL) 86.0 m / 282.2 ft Antenna Centerline (AGL) 8.84 m / 29.0 ft Antenna Model ANT FOR COMM PR 16.4 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 0.00 105.87 -10.00 285.28 5 0.00 100.99 -10.00 285.28 10 0.00 96.10 -10.00 285.28 15 0.00 91.22 -10.00 285.28 20 0.00 86.33 -10.00 285.28 25 0.00 81.44 -10.00 285.28 30 0.00 76.56 -10.00 285.28 35 0.34 71.65 -10.00 267.53 40 1.06 66.71 -10.00 218.30 45 1.34 61.80 -10.00 209.99 50 1.55 56.89 -10.00 206.64 55 2.16 51.94 -10.00 190.83 60 1.90 47.11 -10.00 197.13 65 2.72 42.12 -9.42 180.82 70 2.97 37.23 -7.89 182.86 75 3.41 32.32 -6.46 180.33 80 3.28 27.60 -5.04 190.47 85 3.10 23.01 -2.80 205.27 90 3.15 18.51 -0.11 215.94 95 3.11 14.39 2.61 233.41 100 3.05 11.02 4.00 244.40 105 2.25 9.97 5.05 274.47 110 1.86 10.95 4.05 279.44 115 1.41 13.83 3.00 288.43 120 1.96 17.01 0.79 252.11 125 2.16 20.57 -1.34 232.56 130 2.28 24.06 -3.44 217.63 135 1.93 27.74 -5.10 217.28 140 1.45 31.37 -6.27 225.67 145 1.10 34.70 -6.94 233.23 150 1.26 37.43 -7.97 222.61 155 1.00 40.19 -9.04 225.51 160 1.33 42.10 -9.42 213.23 165 0.64 44.49 -9.90 241.17 170 0.63 45.84 -10.00 241.59 175 0.54 46.74 -10.00 246.96 180 0.40 47.16 -10.00 260.87 185 0.00 47.28 -10.00 285.28 Frequency Coordination and Interference Analysis Report 05/25/2018 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 PEBBLE BEACH, CA Licensee Name Robert Louis Stevenson School Latitude (NAD 83) 36° 34' 48.0" N Longitude (NAD 83) 121° 57' 0.0" W Ground Elevation (AMSL) 86.0 m / 282.2 ft Antenna Centerline (AGL) 8.84 m / 29.0 ft Antenna Model ANT FOR COMM PR 16.4 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 46.44 -10.00 285.28 195 0.00 45.07 -10.00 285.28 200 0.00 43.66 -9.73 286.98 205 0.00 42.69 -9.54 288.23 210 0.00 42.18 -9.44 288.89 215 0.00 42.14 -9.43 288.94 220 0.00 42.59 -9.52 288.36 225 0.00 43.50 -9.70 287.19 230 0.00 44.85 -9.97 285.48 235 0.00 46.59 -10.00 285.28 240 0.00 48.68 -10.00 285.28 245 0.00 51.08 -10.00 285.28 250 0.00 53.74 -10.00 285.28 255 0.00 56.63 -10.00 285.28 260 0.00 59.69 -10.00 285.28 265 0.00 62.92 -10.00 285.28 270 0.00 66.27 -10.00 285.28 275 0.00 69.72 -10.00 285.28 280 0.00 73.25 -10.00 285.28 285 0.00 76.85 -10.00 285.28 290 0.00 80.50 -10.00 285.28 295 0.00 84.18 -10.00 285.28 300 0.00 87.88 -10.00 285.28 305 0.00 91.59 -10.00 285.28 310 0.00 95.30 -10.00 285.28 315 0.00 98.98 -10.00 285.28 320 0.00 102.64 -10.00 285.28 325 0.00 106.24 -10.00 285.28 330 0.00 109.79 -10.00 285.28 335 0.00 113.25 -10.00 285.28 340 0.00 116.62 -10.00 285.28 345 0.00 119.86 -10.00 285.28 350 0.00 115.61 -10.00 285.28 355 0.00 110.75 -10.00 285.28 Frequency Coordination and Interference Analysis Report 05/25/2018 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. Timothy O. Crutcher Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: May 25, 2018 Frequency Coordination and Interference Analysis Report 05/25/2018 Page 10 of 10


Document Created: 2018-05-25 10:15:42
Document Modified: 2018-05-25 10:15:42
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