Attachment 18 GHz Analysis

This document pretains to SES-LIC-20130618-00516 for License on a Satellite Earth Station filing.

IBFS_SESLIC2013061800516_1001244

INTERFERENCE ANALYSIS REPORT Prepared for O3b Networks USA, LLC. BRISTOW, VA (18 GHz Receive) Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 May 28, 2013

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 18 GHz common carrier microwave environment. Further, there will be no restrictions of its operation due to interference considerations.

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.

Date: 05/24/2013 Job Number: 130417COMSGE01 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code O3BNET Licensee Name O3b Networks USA, LLC. Site Information BRISTOW, VA Venue Name Latitude (NAD 83) 38° 47' 0.0" N Longitude (NAD 83) 77° 34' 25.8" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 86.56 m / 284.0 ft Link Information Satellite Type Low Earth Orbit Mode TR - Transmit-Receive Modulation Digital Minimum Elevation Angle 7.0° Azimuth Range 0.0° to 360° Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Information Receive - FCC32 Transmit - FCC32 Manufacturer GD Satcom GD Satcom Model 2.4 Meter 2.4 Meter Gain / Diameter 52.6 dBi / 2.4 m 55.8 dBi / 2.4 m 3-dB / 15-dB Beamwidth 0.23° / 0.60° 0.14° / 0.32° Max Available RF Power (dBW/4 kHz) -14.0 (dBW/MHz) 10.0 Maximum EIRP (dBW/4 kHz) 41.8 (dBW/MHz) 65.8 Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Frequency Information Receive 18.0 GHz Transmit 29.0 GHz Emission / Frequency Range (MHz) 1M00G7D – 216MG7D / 17852.0 - 18068.0 1M00G7D - 216MG7D / 27652.0 - 27868.0 1M00G7D - 216MG7D / 18112.0 - 18328.0 1M00G7D - 216MG7D / 27912.0 - 28128.0 1M00G7D - 216MG7D / 18372.0 - 18588.0 1M00G7D - 216MG7D / 28172.0 - 28388.0 1M00G7D - 216MG7D / 18801.0 - 19017.0 1M00G7D - 216MG7D / 28601.0 - 28817.0 1M00G7D - 216MG7D / 19055.0 - 19271.0 1M00G7D - 216MG7D / 28855.0 - 29071.0 Max Great Circle Coordination Distance 198.5 km / 123.3 mi 136.7 km / 84.9 mi Precipitation Scatter Contour Radius 100.0 km / 62.1 mi 100.0 km / 62.1 mi

Coordination Values BRISTOW, VA Licensee Name O3b Networks USA, LLC. Latitude (NAD 83) 38° 47' 0.0" N Longitude (NAD 83) 77° 34' 25.8" W Ground Elevation (AMSL) 86.56 m / 284.0 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model GD Satcom 2.4 Meter Antenna Mode Receive 18.0 GHz Transmit 29.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Max Available RF Power -14.0 (dBW/4 kHz) Receive 18.0 GHz Transmit 29.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 0.00 97.86 -10.00 100.90 -10.00 100.00 5 0.00 92.86 -10.00 100.00 -10.00 100.00 10 0.00 87.86 -10.00 100.00 -10.00 100.00 15 0.00 82.86 -10.00 100.00 -10.00 100.00 20 0.00 77.86 -10.00 100.00 -10.00 100.00 25 0.00 72.86 -10.00 102.20 -10.00 100.00 30 0.00 67.86 -10.00 103.10 -10.00 100.00 35 0.00 62.86 -10.00 108.30 -10.00 100.00 40 0.00 57.87 -10.00 111.90 -10.00 100.00 45 0.00 52.87 -10.00 107.60 -10.00 100.00 50 0.00 47.87 -10.00 112.00 -10.00 100.00 55 0.00 42.87 -10.00 116.00 -10.00 100.00 60 0.00 37.87 -8.98 138.00 -8.98 100.00 65 0.00 32.87 -7.69 142.70 -7.69 102.20 70 0.00 27.88 -6.23 147.10 -6.23 105.80 75 0.00 22.88 -4.54 152.30 -4.54 109.80 80 0.00 17.89 -2.58 159.20 -2.58 114.50 85 0.00 12.90 -0.16 153.40 -0.16 109.50 90 0.00 7.92 2.89 139.80 2.89 100.00 95 0.00 3.02 6.69 147.40 6.69 100.50 100 0.00 2.34 10.98 158.20 10.98 106.50 105 0.00 7.20 11.99 185.10 11.99 124.70 110 0.00 12.18 7.90 144.30 7.89 100.00 115 0.00 17.17 4.32 127.60 4.33 100.00 120 0.00 22.16 1.61 118.50 1.61 100.00 125 0.00 27.16 -0.49 110.90 -0.49 100.00 130 0.00 32.15 -2.17 102.30 -2.17 100.00 135 0.00 37.15 -3.58 100.00 -3.58 100.00 140 0.00 42.15 -4.79 100.00 -4.79 100.00 145 0.00 47.15 -5.83 100.00 -5.83 100.00 150 0.00 52.15 -6.84 104.50 -6.84 100.00 155 0.00 57.14 -7.55 103.10 -7.55 100.00 160 0.00 62.14 -8.18 110.70 -8.18 100.00 165 0.00 67.14 -8.62 110.30 -8.62 100.00 170 0.00 72.14 -8.94 110.00 -8.94 100.00 175 0.00 77.14 -9.13 109.10 -9.13 100.00 180 0.00 82.14 -9.22 114.60 -9.22 100.00 185 0.00 87.14 -9.11 106.60 -9.11 100.00

Coordination Values BRISTOW, VA Licensee Name O3b Networks USA, LLC. Latitude (NAD 83) 38° 47' 0.0" N Longitude (NAD 83) 77° 34' 25.8" W Ground Elevation (AMSL) 86.56 m / 284.0 ft Antenna Centerline (AGL) 2.74 m / 9.0 ft Antenna Model GD Satcom 2.4 Meter Antenna Mode Receive 18.0 GHz Transmit 29.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -151.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -128.0 dBW/4 kHz 0.0025% Max Available RF Power -14.0 (dBW/4 kHz) Receive 18.0 GHz Transmit 29.0 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 0.00 92.14 -8.93 107.10 -8.92 100.00 195 0.00 97.14 -8.70 129.70 -8.70 100.00 200 0.00 102.14 -8.36 130.90 -8.26 100.00 205 0.00 107.14 -7.77 142.50 -7.77 102.00 210 0.00 112.14 -7.01 143.00 -7.01 102.30 215 0.00 117.14 -6.15 139.70 -6.15 100.00 220 0.00 122.13 -5.13 138.80 -5.13 100.00 225 0.00 127.13 -3.95 142.30 -3.95 101.00 230 0.00 132.13 -2.55 148.90 -2.55 106.60 235 0.00 137.13 -0.84 147.30 -0.84 104.50 240 0.00 142.13 1.29 144.40 1.29 101.30 245 0.00 147.13 3.94 152.30 3.94 106.80 250 0.00 152.12 7.53 166.60 7.53 116.20 255 0.00 157.12 10.91 198.50 10.91 136.70 260 0.00 162.11 10.18 175.90 10.18 122.30 265 0.00 167.10 6.38 158.70 6.38 110.30 270 0.00 172.08 2.76 143.10 2.76 100.00 275 0.00 176.98 -0.17 133.50 -0.17 100.00 280 0.00 177.66 -2.56 128.90 -2.56 100.00 285 0.00 172.80 -4.52 113.50 -4.52 100.00 290 0.00 167.82 -6.22 112.80 -6.22 100.00 295 0.00 162.83 -7.69 109.00 -7.69 100.00 300 0.00 157.84 -8.98 100.00 -7.95 100.00 305 0.00 152.85 -10.00 100.00 -9.24 100.00 310 0.00 147.85 -10.00 100.00 -10.00 100.00 315 0.00 142.85 -10.00 100.00 -10.00 100.00 320 0.00 137.85 -10.00 100.00 -10.00 100.00 325 0.00 132.85 -10.00 100.00 -10.00 100.00 330 0.00 127.85 -10.00 100.00 -10.00 100.00 335 0.00 122.86 -10.00 100.00 -10.00 100.00 340 0.00 117.86 -10.00 100.00 -10.00 100.00 345 0.00 112.86 -10.00 100.00 -10.00 100.00 350 0.00 107.86 -10.00 100.00 -10.00 100.00 355 0.00 102.86 -10.00 100.00 -10.00 100.00


Document Created: 2013-06-11 15:53:08
Document Modified: 2013-06-11 15:53:08
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