Attachment Coord

This document pretains to SES-REG-INTR2018-00593 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREGINTR201800593_1352977

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Public Broadcasting of Colorado, Inc. AVON, CO Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 March 12, 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 03/12/2018 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 03/12/2018 Page 3 of 10

2. SUMMARY OF RESULTS There were no great circle interference cases identified during the interference study of the proposed earth station. No carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 03/12/2018 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 02/14/2018. Company Qwest Corporation Frequency Coordination and Interference Analysis Report 03/12/2018 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 03/12/2018 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 03/12/2018 Job Number: 180214COMSTC03 Administrative Information Licensee Code PUBCOL Licensee Name Public Broadcasting of Colorado, Inc. Site Information AVON, CO Venue Name KPRE K206EM Latitude (NAD 83) 39° 37' 19.9" N Longitude (NAD 83) 106° 29' 16.6" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 2303.87 m / 7558.6 ft Link Information Satellite Type Geostationary Mode RO - Receive-Only Modulation Digital Satellite Arc 58° W to 143° West Longitude Azimuth Range 119.4° to 229.3° Corresponding Elevation Angles 22.7° / 30.8° Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Information Receive Manufacturer Anderson Model Offset Gain / Diameter 38.2 dBi / 2.4 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) 30K0G7W - 36M0G7W / 3700.0 - 4200.0 30K0F7W - 36M0F7W / 3700.0 - 4200.0 Max Great Circle Coordination Distance 285.3 km / 177.2 mi Precipitation Scatter Contour Radius 499.0 km / 310.0 mi Frequency Coordination and Interference Analysis Report 03/12/2018 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 AVON, CO Licensee Name Public Broadcasting of Colorado, Inc. Latitude (NAD 83) 39° 37' 19.9" N Longitude (NAD 83) 106° 29' 16.6" W Ground Elevation (AMSL) 2303.87 m / 7558.6 ft Antenna Centerline (AGL) 9.75 m / 32.0 ft 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 11.69 118.85 -10.00 100.00 5 11.96 113.99 -10.00 100.00 10 12.77 109.14 -10.00 100.00 15 13.31 104.25 -10.00 100.00 20 13.48 99.32 -10.00 100.00 25 13.37 94.39 -10.00 100.00 30 13.47 89.45 -10.00 100.00 35 12.76 84.53 -10.00 100.00 40 12.06 79.63 -10.00 100.00 45 11.23 74.76 -10.00 100.00 50 10.73 69.91 -10.00 100.00 55 9.90 65.12 -10.00 100.00 60 9.39 60.35 -10.00 100.00 65 9.63 55.50 -10.00 100.00 70 9.55 50.71 -10.00 100.00 75 8.95 46.09 -9.59 100.00 80 7.96 41.68 -8.50 110.17 85 8.61 36.88 -7.17 109.79 90 7.18 32.95 -5.95 128.74 95 6.33 29.12 -4.61 142.59 100 6.37 25.17 -3.02 149.83 105 6.30 21.71 -1.42 159.28 110 5.42 19.60 -0.31 178.79 115 5.58 17.65 0.83 183.40 120 5.37 17.32 1.04 187.15 125 6.19 17.37 1.00 176.76 130 6.63 19.13 -0.04 162.51 135 8.47 20.70 -0.90 136.34 140 9.88 22.47 -1.79 121.59 145 10.91 24.23 -2.61 110.67 150 11.43 26.10 -3.42 103.67 155 11.72 27.83 -4.11 100.00 160 11.69 29.51 -4.75 100.00 165 11.71 30.78 -5.21 100.00 170 11.72 31.70 -5.53 100.00 175 11.54 32.43 -5.77 100.00 180 11.61 32.54 -5.81 100.00 185 11.05 32.92 -5.94 100.00 Frequency Coordination and Interference Analysis Report 03/12/2018 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 AVON, CO Licensee Name Public Broadcasting of Colorado, Inc. Latitude (NAD 83) 39° 37' 19.9" N Longitude (NAD 83) 106° 29' 16.6" W Ground Elevation (AMSL) 2303.87 m / 7558.6 ft Antenna Centerline (AGL) 9.75 m / 32.0 ft 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 10.31 33.08 -5.99 100.50 195 11.14 31.33 -5.40 100.00 200 12.03 29.18 -4.63 100.00 205 12.75 26.89 -3.74 100.00 210 14.22 23.61 -2.33 100.00 215 15.70 20.10 -0.58 100.00 220 14.33 18.81 0.14 100.29 225 13.21 18.07 0.58 109.60 230 11.64 19.16 -0.06 117.05 235 10.92 20.64 -0.87 118.23 240 11.03 22.38 -1.75 113.59 245 10.30 25.63 -3.22 112.25 250 10.22 28.89 -4.52 107.28 255 9.05 33.21 -6.03 110.59 260 8.09 37.54 -7.36 113.53 265 5.76 42.66 -8.75 132.47 270 4.98 46.99 -9.80 134.60 275 3.94 51.49 -10.00 149.17 280 3.15 55.90 -10.00 166.20 285 0.82 60.82 -10.00 230.25 290 0.00 65.18 -10.00 285.28 295 0.78 69.16 -10.00 232.32 300 1.96 73.21 -10.00 195.68 305 2.09 77.53 -10.00 192.51 310 2.52 81.86 -10.00 182.51 315 3.71 86.21 -10.00 153.79 320 4.74 90.67 -10.00 137.10 325 6.34 95.23 -10.00 121.51 330 7.41 99.85 -10.00 109.94 335 8.02 104.49 -10.00 103.60 340 8.57 109.14 -10.00 100.00 345 9.12 113.81 -10.00 100.00 350 8.78 118.29 -10.00 100.00 355 9.67 123.02 -10.00 100.00 Frequency Coordination and Interference Analysis Report 03/12/2018 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: March 12, 2018 Frequency Coordination and Interference Analysis Report 03/12/2018 Page 10 of 10


Document Created: 2018-03-12 16:17:50
Document Modified: 2018-03-12 16:17:50
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