Attachment Exhibit A

This document pretains to SES-REG-20111020-01235 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREG2011102001235_921505

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                     Prepared for

                 Google Fiber, Inc.
              Mountain View, California

                Satellite Earth Station




                     Prepared By:
                    COMSEARCH
             19700 Janelia Farm Boulevard
                Ashburn, Virginia 20147
                   October 16, 2011


                                                     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                                             10/16/2011                       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   10/16/2011         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.

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

       None



No carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report    10/16/2011         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 September
14, 2011.


        Company

        AT&T California
        MCI Communications Services Inc.




Frequency Coordination and Interference Analysis Report              10/16/2011             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            10/16/2011            Page 6 of 10


                                                            COMSEARCH
                                                      Earth Station Data Sheet
                                             19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                               (703)726-5500 http://www.comsearch.com

Date:                                    10/16/2011
Job Number:                              110914COMSJC02
Administrative Information
Status                                   ENGINEER PROPOSAL
Call Sign
Licensee Code                            GOOFIB
Licensee Name                            Google Fiber, Inc.
Site Information                         MOUNTAIN VIEW, CALIFORNIA
Venue Name
Latitude (NAD 83)                        37° 25' 15.4" N
Longitude (NAD 83)                       122° 4' 14.3" W
Climate Zone                             A
Rain Zone                                4
Ground Elevation (AMSL)                  4.27 m / 14.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     RO - Receive-Only
Modulation                               Analog and Digital
Satellite Arc                            70° W to 135° West Longitude
Azimuth Range                            115.3° to 200.7°
Corresponding Elevation Angles           21.1° / 44.5°
Antenna Centerline (AGL)                 3.05 m / 10.0 ft
Antenna Information                            Receive
Manufacturer                                   ViaSat
Model                                          4.5 Meter
Gain / Diameter                                43.6 dBi / 4.5 m
3-dB / 15-dB Beamwidth                         1.14° / 2.14°

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)               36M0F8W / 3700.0 - 4200.0
                                               36M0G7W / 3700.0 - 4200.0


Max Great Circle Coordination Distance         348.1 km / 216.3 mi
Precipitation Scatter Contour Radius           367.6 km / 228.4 mi




Frequency Coordination and Interference Analysis Report                      10/16/2011        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              MOUNTAIN VIEW, CA
Licensee Name                     Google Fiber, Inc.
Latitude (NAD 83)                 37° 25' 15.4" N
Longitude (NAD 83)                122° 4' 14.3" W
Ground Elevation (AMSL)           4.27 m / 14.0 ft
Antenna Centerline (AGL)          3.05 m / 10.0 ft
Antenna Model                     ViaSat 4.5 Meter
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              113.53                   -10.00         285.28
  5             0.00              108.92                   -10.00         285.28
 10             0.00              104.29                   -10.00         285.28
 15             0.00              99.64                    -10.00         285.28
 20             0.00              94.98                    -10.00         285.28
 25             0.00              90.32                    -10.00         285.28
 30             0.00              85.66                    -10.00         285.28
 35             0.00              81.00                    -10.00         285.28
 40             0.00              76.35                    -10.00         285.28
 45             0.00              71.71                    -10.00         285.28
 50             0.00              67.10                    -10.00         285.28
 55             0.00              62.51                    -10.00         285.28
 60             0.00              57.96                    -10.00         285.28
 65             0.00              53.46                    -10.00         285.28
 70             0.00              49.03                    -10.00         285.28
 75             0.00              44.68                     -9.25         290.08
 80             0.00              40.45                     -8.17         297.17
 85             0.00              36.38                     -7.02         304.93
 90             0.00              32.53                     -5.81         313.98
 95             0.00              28.99                     -4.56         322.85
100             0.00              25.89                     -3.33         331.72
105             0.00              23.40                     -2.23         339.78
110             0.00              21.75                     -1.43         345.73
115             0.00              21.11                     -1.11         348.14
120             0.00              21.60                     -1.36         346.30
125             0.00              23.12                     -2.10         340.75
130             0.00              25.51                     -3.17         332.90
135             0.00              28.54                     -4.38         324.07
140             0.00              31.80                     -5.56         315.72
145             0.21              34.70                     -6.51         307.09
150             0.25              37.49                     -7.35         296.25
155             0.28              39.99                     -8.05         287.49
160             0.32              42.13                     -8.61         278.54
165             0.37              43.86                     -9.05         270.53
170             0.40              45.14                     -9.36         264.92
175             0.41              45.94                     -9.55         263.11
180             0.40              46.22                     -9.62         263.20
185             0.41              45.93                     -9.55         262.28




Frequency Coordination and Interference Analysis Report                10/16/2011        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              MOUNTAIN VIEW, CA
Licensee Name                     Google Fiber, Inc.
Latitude (NAD 83)                 37° 25' 15.4" N
Longitude (NAD 83)                122° 4' 14.3" W
Ground Elevation (AMSL)           4.27 m / 14.0 ft
Antenna Centerline (AGL)          3.05 m / 10.0 ft
Antenna Model                     ViaSat 4.5 Meter
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             0.46              45.09                     -9.35         257.76
195             0.54              44.29                     -9.16         252.44
200             0.44              44.09                     -9.11         261.44
205             0.66              44.04                     -9.10         244.84
210             0.81              44.51                     -9.21         235.10
215             0.58              45.77                     -9.51         247.49
220             0.98              46.84                     -9.77         222.55
225             0.95              48.69                    -10.00         222.92
230             0.78              50.96                    -10.00         232.52
235             1.02              53.19                    -10.00         219.57
240             0.83              55.99                    -10.00         229.70
245             0.49              59.04                    -10.00         250.71
250             0.74              61.92                    -10.00         234.77
255             0.37              65.26                    -10.00         264.78
260             0.31              68.54                    -10.00         271.96
265             0.39              71.87                    -10.00         261.70
270             0.00              75.41                    -10.00         285.28
275             0.00              78.88                    -10.00         285.28
280             0.00              82.40                    -10.00         285.28
285             0.00              85.94                    -10.00         285.28
290             0.00              89.51                    -10.00         285.28
295             0.00              93.07                    -10.00         285.28
300             0.00              96.62                    -10.00         285.28
305             0.00              100.15                   -10.00         285.28
310             0.00              103.63                   -10.00         285.28
315             0.00              107.06                   -10.00         285.28
320             0.00              110.42                   -10.00         285.28
325             0.00              113.69                   -10.00         285.28
330             0.00              116.85                   -10.00         285.28
335             0.00              119.86                   -10.00         285.28
340             0.00              122.72                   -10.00         285.28
345             0.00              125.38                   -10.00         285.28
350             0.00              122.66                   -10.00         285.28
355             0.00              118.12                   -10.00         285.28




Frequency Coordination and Interference Analysis Report                10/16/2011        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.




Jeffrey E. Cowles
Engineer III, Telecommunications
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, Va. 20147


DATED: October 16, 2011




Frequency Coordination and Interference Analysis Report   10/16/2011   Page 10 of 10



Document Created: 2019-04-22 06:44:56
Document Modified: 2019-04-22 06:44:56

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