Attachment Exhibit A

This document pretains to SES-AMD-20120203-00139 for Amended Filing on a Satellite Earth Station filing.

IBFS_SESAMD2012020300139_938218

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Google Fiber, Inc. Council Bluffs, Iowa Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 December 2, 2011

TABLE OF CONTENTS 1. CONCLUSIONS.............................................................................................................................................3 2. SUMMARY OF RESULTS.............................................................................................................................4 3. SUPPLEMENTAL SHOWING .......................................................................................................................5 4. EARTH STATION COORDINATION DATA ..................................................................................................7 5. CERTIFICATION .........................................................................................................................................11 Frequency Coordination and Interference Analysis Report 12/02/2011 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 12/02/2011 Page 3 of 11

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. The following companies reported potential great circle interference conflicts that did not meet the objectives on a line-of-sight basis. When over-the-horizon losses are considered on the interfering paths, sufficient blockage exists to negate harmful interference from occurring with the proposed receive-only earth station. Company Union Pacific Railroad Company No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 12/02/2011 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 November 2, 2011. Company Airband Communications Inc BNSF Railway Company Cherokee Regional Medical Center City of St. Joseph Clearwire Spectrum Holdings III, LLC Community Internet System Inc. Cox Communications Kansas LLC Douglas County Communications Department EVERTEK, Inc. Future Technologies GRAND ISLAND, CITY OF Giant Communications Inc Jagwire Enterprises KCP&L Greater Missouri Operations Compan Kansas Department of Transportation KeyOn Communications, Inc. Long Lines Wireless, LLC Loup River Public Power District METROPOLITAN AREA NETWORKS, INC. NE Colorado Cellular, Inc. NEBRASKA PUBLIC POWER DISTRICT NEBRASKA, STATE OF New Cingular Wireless PCS, LLC (was WWC) New Cingular Wireless PCS, LLC - KS/MO Nex-Tech, Inc. Northwest Communications Inc. OEM Communications OMAHA PUBLIC POWER DISTRICT Papillion Public Schools Pottawattamie, County of SIOUX VALLEY MEMORIAL HOSPITAL Sparkplug Central, Inc. Superior iNET Telebeep, Inc. Frequency Coordination and Interference Analysis Report 12/02/2011 Page 5 of 11

Company (Continued) USCOC of Greater Iowa, LLC USCOC of Greater Missouri, LLC USCOC of Iowa RSA 16 Inc. USD111 Doniphan West Schools Union Pacific Railroad Company United States Cellular OP Co Des Moines Frequency Coordination and Interference Analysis Report 12/02/2011 Page 6 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 12/02/2011 Page 7 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 12/02/2011 Job Number: 111102COMSJC09 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code GOOFIB Licensee Name Google Fiber, Inc. Site Information COUNCIL BLUFFS, IOWA Venue Name Latitude (NAD 83) 41° 13' 14.2" N Longitude (NAD 83) 95° 52' 1.3" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 300.0 m / 984.3 ft Link Information Satellite Type Geostationary Mode RO - Receive-Only Modulation Analog and Digital Satellite Arc 50° W to 143° West Longitude Azimuth Range 122.6° to 238.5° Corresponding Elevation Angles 23.6° / 22.8° Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Information Receive Manufacturer ViaSat Model 4.5 Meter Gain / Diameter 53.1 dBi / 4.5 m 3-dB / 15-dB Beamwidth 0.40° / 0.75° Interference Objectives: Long Term -156.0 dBW/MHz 20% Short Term -146.0 dBW/MHz 0.01% Frequency Information Receive 11.0 GHz Emission / Frequency Range (MHz) 36M0F8W / 10950.0 - 11200.0 36M0G7W / 10950.0 - 11200.0 36M0F8W / 11450.0 - 11700.0 36M0G7W / 11450.0 - 11700.0 Max Great Circle Coordination Distance 268.1 km / 166.6 mi Precipitation Scatter Contour Radius 491.0 km / 305.0 mi Frequency Coordination and Interference Analysis Report 12/02/2011 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 COUNCIL BLUFFS, IA Licensee Name Google Fiber, Inc. Latitude (NAD 83) 41° 13' 14.2" N Longitude (NAD 83) 95° 52' 1.3" W Ground Elevation (AMSL) 300.0 m / 984.3 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model ViaSat 4.5 Meter Antenna Mode Receive 11.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% Short Term -146.0 dBW/MHz 0.01% Receive 11.0 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 0 0.00 118.76 -10.00 231.37 5 0.00 115.11 -10.00 231.37 10 0.53 110.70 -10.00 203.07 15 0.57 106.15 -10.00 203.58 20 0.60 101.58 -10.00 201.94 25 0.70 96.99 -10.00 197.09 30 1.01 92.39 -10.00 181.39 35 1.02 87.78 -10.00 181.05 40 1.11 83.16 -10.00 178.11 45 0.96 78.57 -10.00 183.91 50 0.90 73.98 -10.00 186.86 55 0.84 69.43 -10.00 190.17 60 0.40 64.98 -10.00 213.22 65 0.57 60.45 -10.00 203.58 70 0.59 56.01 -10.00 202.60 75 0.53 51.66 -10.00 205.18 80 0.47 47.40 -9.89 206.98 85 0.44 43.25 -8.90 213.54 90 0.60 39.16 -7.82 208.41 95 0.54 35.38 -6.72 215.87 100 0.39 31.96 -5.62 233.12 105 0.00 29.15 -4.62 256.71 110 0.00 26.60 -3.62 261.72 115 0.00 24.74 -2.84 265.75 120 0.00 23.75 -2.39 268.06 125 0.00 23.74 -2.39 268.10 130 0.00 24.69 -2.81 265.87 135 0.00 26.51 -3.59 261.89 140 0.00 29.04 -4.58 256.90 145 0.00 31.84 -5.57 251.97 150 0.00 34.41 -6.42 247.91 155 0.00 36.69 -7.11 244.59 160 0.00 38.65 -7.68 241.82 165 0.00 40.24 -8.12 239.81 170 0.00 41.40 -8.43 238.39 175 0.00 42.12 -8.61 237.54 180 0.00 42.36 -8.68 237.26 Frequency Coordination and Interference Analysis Report 12/02/2011 Page 9 of 11

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values COUNCIL BLUFFS, IA Licensee Name Google Fiber, Inc. Latitude (NAD 83) 41° 13' 14.2" N Longitude (NAD 83) 95° 52' 1.3" W Ground Elevation (AMSL) 300.0 m / 984.3 ft Antenna Centerline (AGL) 3.05 m / 10.0 ft Antenna Model ViaSat 4.5 Meter Antenna Mode Receive 11.0 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% Short Term -146.0 dBW/MHz 0.01% Receive 11.0 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 185 0.00 42.12 -8.61 237.54 190 0.00 41.40 -8.43 238.39 195 0.25 40.00 -8.05 235.03 200 0.46 38.23 -7.56 217.62 205 0.58 36.19 -6.97 212.98 210 0.55 33.95 -6.27 217.49 215 0.47 31.46 -5.44 225.93 220 0.45 28.69 -4.44 233.02 225 0.33 26.02 -3.38 249.14 230 0.41 23.85 -2.44 246.13 235 0.46 22.57 -1.84 245.03 240 0.42 22.39 -1.75 249.09 245 0.40 23.23 -2.15 248.88 250 0.50 24.91 -2.91 235.90 255 0.48 27.45 -3.96 232.27 260 0.40 30.60 -5.14 234.05 265 0.52 34.03 -6.30 218.57 270 0.54 37.84 -7.45 212.84 275 0.55 41.87 -8.55 207.94 280 0.57 46.06 -9.58 205.33 285 0.61 50.35 -10.00 201.57 290 0.65 54.74 -10.00 199.69 295 0.50 59.24 -10.00 204.26 300 0.39 63.78 -10.00 214.05 305 0.32 68.33 -10.00 220.27 310 0.00 72.94 -10.00 231.37 315 0.00 77.53 -10.00 231.37 320 0.00 82.12 -10.00 231.37 325 0.00 86.73 -10.00 231.37 330 0.00 91.34 -10.00 231.37 335 0.00 95.95 -10.00 231.37 340 0.00 100.55 -10.00 231.37 345 0.00 105.14 -10.00 231.37 350 0.00 109.71 -10.00 231.37 355 0.00 114.25 -10.00 231.37 Frequency Coordination and Interference Analysis Report 12/02/2011 Page 10 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. Jeffrey E. Cowles Engineer III, Telecommunications COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Va. 20147 DATED: December 2, 2011 Frequency Coordination and Interference Analysis Report 12/02/2011 Page 11 of 11


Document Created: 2019-04-17 12:46:33
Document Modified: 2019-04-17 12:46:33
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC