Attachment Exhibit B

This document pretains to SES-LIC-20170928-01067 for License on a Satellite Earth Station filing.

IBFS_SESLIC2017092801067_1282808

Exhibit B FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Comprehensive Nuclear Test Ban Treaty Org. SHEMYA ISLAND, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 June 23, 2017

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 06/23/2017 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 06/23/2017 Page 3 of 10

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 06/23/2017 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 06/09/2017. Company Comsearch Frequency Coordination and Interference Analysis Report 06/23/2017 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 06/23/2017 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 06/23/2017 Job Number: 170609COMSGE05 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code CTBTO Licensee Name Comprehensive Nuclear Test Ban Treaty Org. Site Information SHEMYA ISLAND, AK Venue Name Latitude (NAD 83) 52° 43' 26.4" N Longitude (NAD 83) 174° 7' 8.4" E Climate Zone B Rain Zone 2 Ground Elevation (AMSL) 47.0 m / 154.2 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 177° W to 206° West Longitude Azimuth Range 168.9° to 204.7° Corresponding Elevation Angles 29.2° / 26.9° Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer Prodelin Prodelin Model 1251 1251 Gain / Diameter 38.0 dBi / 2.4 m 42.0 dBi / 2.4 m 3-dB / 15-dB Beamwidth 2.30° / 4.60° 1.36° / 2.72° Max Available RF Power (dBW/4 kHz) -10.0 (dBW/MHz) 14.0 Maximum EIRP (dBW/4 kHz) 32.0 (dBW/MHz) 56.0 Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Frequency Information Receive 4.0 GHz Transmit 6.1 GHz Emission / Frequency Range (MHz) 87K0G7D - 100KG7D / 3700.0 - 4200.0 87K0G7D - 100KG7D / 5925.0 - 6425.0 Max Great Circle Coordination Distance 497.0 km / 308.8 mi 194.5 km / 120.8 mi Precipitation Scatter Contour Radius 492.8 km / 306.2 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 06/23/2017 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 SHEMYA ISLAND, AK Licensee Name Comprehensive Nuclear Test Ban Treaty Org. Latitude (NAD 83) 52° 43' 26.4" N Longitude (NAD 83) 174° 7' 8.4" E Ground Elevation (AMSL) 47.0 m / 154.2 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Prodelin 2.4 meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power -10.0 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 0.00 144.10 -10.00 412.20 -10.00 162.88 5 0.00 147.02 -10.00 412.20 -10.00 162.88 10 0.00 144.55 -10.00 412.20 -10.00 162.88 15 0.00 141.63 -10.00 412.20 -10.00 162.88 20 0.00 138.38 -10.00 412.20 -10.00 162.88 25 0.00 134.86 -10.00 412.20 -10.00 162.88 30 0.00 131.14 -10.00 412.20 -10.00 162.88 35 0.00 127.25 -10.00 412.20 -10.00 162.88 40 0.00 123.24 -10.00 412.20 -10.00 162.88 45 0.00 119.13 -10.00 412.20 -10.00 162.88 50 0.00 114.95 -10.00 412.20 -10.00 162.88 55 0.00 110.71 -10.00 412.20 -10.00 162.88 60 0.00 106.42 -10.00 412.20 -10.00 162.88 65 0.00 102.10 -10.00 412.20 -10.00 162.88 70 0.00 97.75 -10.00 412.20 -10.00 162.88 75 0.00 93.39 -10.00 412.20 -10.00 162.88 80 0.00 89.03 -10.00 412.20 -10.00 162.88 85 0.00 84.66 -10.00 412.20 -10.00 162.88 90 0.00 80.31 -10.00 412.20 -10.00 162.88 95 0.00 75.97 -10.00 412.20 -10.00 162.88 100 0.00 71.67 -10.00 412.20 -10.00 162.88 105 0.00 67.40 -10.00 412.20 -10.00 162.88 110 0.00 63.18 -10.00 412.20 -10.00 162.88 115 0.00 59.02 -10.00 412.20 -10.00 162.88 120 0.00 54.96 -10.00 412.20 -10.00 162.88 125 0.00 51.00 -10.00 412.20 -10.00 162.88 130 0.00 47.18 -9.84 414.14 -9.84 163.59 135 0.00 43.54 -8.97 425.16 -8.97 167.65 140 0.00 40.13 -8.09 436.65 -8.09 171.89 145 0.00 37.02 -7.21 448.34 -7.21 176.21 150 0.00 34.29 -6.38 459.72 -6.38 180.43 155 0.00 32.04 -5.64 469.42 -5.64 184.26 160 0.00 30.38 -5.06 477.69 -5.06 187.33 165 0.00 29.40 -4.71 482.82 -4.71 189.23 170 0.00 29.19 -4.63 483.99 -4.63 189.66 175 0.00 29.57 -4.77 481.92 -4.77 188.89 180 0.00 29.73 -4.83 481.06 -4.83 188.58 185 0.00 29.57 -4.77 481.91 -4.77 188.89 Frequency Coordination and Interference Analysis Report 06/23/2017 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 SHEMYA ISLAND, AK Licensee Name Comprehensive Nuclear Test Ban Treaty Org. Latitude (NAD 83) 52° 43' 26.4" N Longitude (NAD 83) 174° 7' 8.4" E Ground Elevation (AMSL) 47.0 m / 154.2 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model Prodelin 2.4 meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power -10.0 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.00 29.09 -4.59 484.53 -4.59 189.86 195 0.00 28.29 -4.29 488.93 -4.29 191.49 200 0.00 27.29 -3.90 494.77 -3.90 193.65 205 0.00 26.91 -3.75 497.03 -3.75 194.49 210 0.00 27.39 -3.94 494.18 -3.94 193.44 215 0.00 28.67 -4.44 486.81 -4.44 190.70 220 0.00 30.67 -5.17 476.20 -5.17 186.77 225 0.00 33.24 -6.04 464.42 -6.04 182.17 230 0.00 36.27 -6.99 451.36 -6.99 177.33 235 0.00 39.65 -7.96 438.39 -7.96 172.53 240 0.00 43.29 -8.91 425.95 -8.91 167.94 245 0.00 47.14 -9.84 414.25 -9.84 163.63 250 0.00 51.15 -10.00 412.20 -10.00 162.88 255 0.00 55.27 -10.00 412.20 -10.00 162.88 260 0.00 59.49 -10.00 412.20 -10.00 162.88 265 0.00 63.77 -10.00 412.20 -10.00 162.88 270 0.00 68.11 -10.00 412.20 -10.00 162.88 275 0.00 72.50 -10.00 412.20 -10.00 162.88 280 0.00 76.91 -10.00 412.20 -10.00 162.88 285 0.00 81.35 -10.00 412.20 -10.00 162.88 290 0.00 85.80 -10.00 412.20 -10.00 162.88 295 0.00 90.26 -10.00 412.20 -10.00 162.88 300 0.00 94.72 -10.00 412.20 -10.00 162.88 305 0.00 99.17 -10.00 412.20 -10.00 162.88 310 0.00 103.60 -10.00 412.20 -10.00 162.88 315 0.00 108.01 -10.00 412.20 -10.00 162.88 320 0.00 112.39 -10.00 412.20 -10.00 162.88 325 0.00 116.73 -10.00 412.20 -10.00 162.88 330 0.00 121.01 -10.00 412.20 -10.00 162.88 335 0.00 125.21 -10.00 412.20 -10.00 162.88 340 0.00 129.33 -10.00 412.20 -10.00 162.88 345 0.00 133.31 -10.00 412.20 -10.00 162.88 350 0.00 137.14 -10.00 412.20 -10.00 162.88 355 0.00 140.76 -10.00 412.20 -10.00 162.88 Frequency Coordination and Interference Analysis Report 06/23/2017 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. BY: _ Gary K. Edwards Senior Manager COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: June 23, 2017 Frequency Coordination and Interference Analysis Report 06/23/2017 Page 10 of 10


Document Created: 2017-09-28 15:42:41
Document Modified: 2017-09-28 15:42:41
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