Attachment Exhibit B

This document pretains to SES-LIC-INTR2019-01415 for License on a Satellite Earth Station filing.

IBFS_SESLICINTR201901415_1678939

                                            Exhibit A

                                    Frequency Coordination


Per 47 C.F.R. Ch. 1 §25.130(b), attached is a “Frequency Coordination and Interference Analysis
Report” performed pursuant to 47 C.F.R. Ch. 1 §25.203.


FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                    Prepared for
             GCI Communications Corp.
                    KOTLIK, AK
               Satellite Earth Station




                     Prepared By:
                    COMSEARCH
             19700 Janelia Farm Boulevard
                 Ashburn, VA 20147
                    April 30, 2019


                                                      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                                             04/30/2019                        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   04/30/2019         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 transmit-receive earth station.


       Company

       United Utilities, Inc.
       United2, LLC



No other carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report    04/30/2019         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 04/17/2019.

        Company
        GCI Communications Corp.
        Unicom, Inc.
        United Utilities, Inc.
        United2, LLC




Frequency Coordination and Interference Analysis Report                 04/30/2019              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            04/30/2019            Page 6 of 10


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

Date:                                    04/30/2019
Job Number:                              190417COMSTC06
Administrative Information
Call Sign                                E020088
Licensee Code                            P3203
Licensee Name                            GCI Communications Corp.
Site Information                         KOTLIK, AK
Latitude (NAD 83)                        63° 2' 7.8" N
Longitude (NAD 83)                       163° 31' 55.5" W
Climate Zone                             B
Rain Zone                                2
Ground Elevation (AMSL)                  2.74 m / 9.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     TR - Transmit-Receive
Modulation                               Digital
Satellite Arc                            105° W to 222° West Longitude
Azimuth Range                            118.6° to 241.3°
Corresponding Elevation Angles           5.0° / 5.1°
Antenna Centerline (AGL)                 3.08 m / 10.1 ft
Antenna Information                            Receive                                 Transmit
Manufacturer                                   Viasat/Scientific-Atlanta               Viasat/Scientific-Atlanta
Model                                          8136                                    8136
Gain / Diameter                                41.8 dBi / 3.6 m                        45.9 dBi / 3.6 m
3-dB / 15-dB Beamwidth                         1.40° / 3.00°                           0.90° / 1.70°

                                                                                     45K0G7W - 108MG7W
                                                                                     45K0D7W - 108MD7W
Max Available RF Power        (dBW/4 kHz)                                               -2.7     -18.29
                              (dBW/MHz)                                                 7.81       5.71

Maximum EIRP                  (dBW/4 kHz)                                              43.2       27.61
                              (dBW/MHz)                                                43.2       51.61
                              (dBW)                                                    53.71      71.92


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)               45K0G7W - 108MG7W / 3700.0 - 4200.0     45K0G7W - 108MG7W / 5925.0 - 6425.0
                                               45K0D7W - 108MD7W / 3700.0 - 4200.0     45K0D7W - 108MD7W / 5925.0 - 6425.0


Max Great Circle Coordination Distance         840.4 km / 522.2 mi                     388.3 km / 241.3 mi
Precipitation Scatter Contour Radius           619.5 km / 384.9 mi                     101.7 km / 63.2 mi




Frequency Coordination and Interference Analysis Report                       04/30/2019             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             KOTLIK, AK
Licensee Name                     GCI Communications Corp.
Latitude (NAD 83)                 63° 2' 7.8" N
Longitude (NAD 83)                163° 31' 55.5" W
Ground Elevation (AMSL)           2.74 m / 9.0 ft
Antenna Centerline (AGL)          3.08 m / 10.1 ft
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                                                            -2.7 (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              118.49                  -10.00          412.20               -10.00         200.77
 5              0.00              113.52                  -10.00          412.20               -10.00         200.77
 10             0.00              108.54                  -10.00          412.20               -10.00         200.77
 15             0.00              103.56                  -10.00          412.20               -10.00         200.77
 20             0.00               98.58                  -10.00          412.20               -10.00         200.77
 25             0.00               93.60                  -10.00          412.20               -10.00         200.77
 30             0.00               88.62                  -10.00          412.20               -10.00         200.77
 35             0.00               83.64                  -10.00          412.20               -10.00         200.77
 40             0.00               78.66                  -10.00          412.20               -10.00         200.77
 45             0.00               73.68                  -10.00          412.20               -10.00         200.77
 50             0.00               68.70                  -10.00          412.20               -10.00         200.77
 55             0.00               63.72                  -10.00          412.20               -10.00         200.77
 60             0.00               58.75                  -10.00          412.20               -10.00         200.77
 65             0.00               53.78                  -10.00          412.20               -10.00         200.77
 70             0.00               48.81                  -10.00          412.20               -10.00         200.77
 75             0.00               43.85                   -9.05          424.18                -9.05         206.26
 80             0.00               38.89                   -7.75          441.17                -7.75         213.95
 85             0.00               33.95                   -6.27          461.24                -6.27         222.95
 90             0.00               29.02                   -4.57          484.91                -4.57         233.67
 95             0.00               24.11                   -2.56          515.25                -2.56         246.81
100             0.00               19.26                   -0.12          554.55                -0.12         261.88
105             0.00               14.50                    2.97          608.02                 2.97         284.92
110             0.00                9.96                    7.04          684.77                 7.04         319.13
115             0.00                6.19                   12.21          794.97                12.21         368.47
120             0.00                5.21                   14.07          840.42                14.07         388.35
125             0.00                7.10                   10.72          761.89                10.72         353.34
130             0.00                8.94                    8.21          708.63                 8.21         329.80
135             0.00               10.65                    6.31          670.39                 6.31         312.72
140             0.00               12.24                    4.81          641.31                 4.81         299.83
145             0.00               13.69                    3.59          619.36                 3.59         289.89
150             0.00               14.98                    2.61          601.67                 2.61         282.16
155             0.00               16.09                    1.83          587.85                 1.83         276.16
160             0.00               17.03                    1.22          577.21                 1.22         271.57
165             0.00               17.76                    0.76          569.32                 0.76         268.18
170             0.00               18.30                    0.44          563.85                 0.44         265.84
175             0.00               18.62                    0.25          560.62                 0.25         264.47
180             0.00               18.74                    0.18          559.54                 0.18         264.00
185             0.00               18.62                    0.25          560.63                 0.25         264.47




Frequency Coordination and Interference Analysis Report                04/30/2019            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             KOTLIK, AK
Licensee Name                     GCI Communications Corp.
Latitude (NAD 83)                 63° 2' 7.8" N
Longitude (NAD 83)                163° 31' 55.5" W
Ground Elevation (AMSL)           2.74 m / 9.0 ft
Antenna Centerline (AGL)          3.08 m / 10.1 ft
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                                                            -2.7 (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               18.30                    0.44          563.86                 0.44         265.84
195             0.00               17.76                    0.76          569.32                 0.76         268.18
200             0.00              17.03                     1.22          577.21                 1.22         271.57
205             0.00               16.10                    1.83          587.84                 1.83         276.15
210             0.00               14.98                    2.61          601.66                 2.61         282.15
215             0.00               13.69                    3.59          619.35                 3.59         289.88
220             0.00               12.24                    4.81          641.31                 4.81         299.83
225             0.00               10.65                    6.31          670.42                 6.31         312.73
230             0.00                8.94                    8.21          708.62                 8.21         329.79
235             0.00                7.10                   10.72          761.85                10.72         353.31
240             0.00                5.22                   14.05          839.97                14.05         388.13
245             0.00                6.25                   12.11          792.75                12.11         367.45
250             0.00               10.03                    6.97          683.35                 6.97         318.49
255             0.00               14.56                    2.92          607.14                 2.92         284.54
260             0.00               19.32                   -0.15          553.94                -0.15         261.62
265             0.00               24.18                   -2.59          514.80                -2.59         246.62
270             0.00               29.08                   -4.59          484.56                -4.59         233.52
275             0.00               34.01                   -6.29          460.96                -6.29         222.82
280             0.00               38.95                   -7.76          440.93                -7.76         213.85
285             0.00               43.91                   -9.06          423.99                -9.06         206.17
290             0.00               48.87                  -10.00          412.20               -10.00         200.77
295             0.00               53.84                  -10.00          412.20               -10.00         200.77
300             0.00              58.81                   -10.00          412.20               -10.00         200.77
305             0.00               63.79                  -10.00          412.20               -10.00         200.77
310             0.00               68.76                  -10.00          412.20               -10.00         200.77
315             0.00               73.74                  -10.00          412.20               -10.00         200.77
320             0.00               78.72                  -10.00          412.20               -10.00         200.77
325             0.00               83.70                  -10.00          412.20               -10.00         200.77
330             0.00               88.68                  -10.00          412.20               -10.00         200.77
335             0.00               93.66                  -10.00          412.20               -10.00         200.77
340             0.00               98.64                  -10.00          412.20               -10.00         200.77
345             0.00              103.62                  -10.00          412.20               -10.00         200.77
350             0.00              108.60                  -10.00          412.20               -10.00         200.77
355             0.00              113.58                  -10.00          412.20               -10.00         200.77




Frequency Coordination and Interference Analysis Report                04/30/2019            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: April 30, 2019




Frequency Coordination and Interference Analysis Report   04/30/2019   Page 10 of 10



Document Created: 2019-04-30 08:11:17
Document Modified: 2019-04-30 08:11:17

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