Attachment Exhibit A

This document pretains to SES-MOD-20101216-01583 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010121601583_857062

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                      Prepared for
            GCI Communication Corporation
                   DILLINGHAM, AK
                 Satellite Earth Station




                     Prepared By:
                    COMSEARCH
             19700 Janelia Farm Boulevard
                 Ashburn, VA 20147
                 December 02, 2010


                                                      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                                             12/02/2010                        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   12/02/2010         Page 3 of 10


2. SUMMARY OF RESULTS


There were no great circle interference cases were identified during the interference study
of the proposed earth station.



No carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report   12/02/2010          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 12/02/2010.

        Company
        NUSHAGAK ELECTRIC & TELEPHONE COOP




Frequency Coordination and Interference Analysis Report                 12/02/2010              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            12/02/2010            Page 6 of 10


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


Date:                                    12/02/2010
Job Number:                              101202COMSTC01
Administrative Information
Licensee Name                            GCI Communication Corporation
Site Information                         DILLINGHAM, AK
Latitude (NAD 83)                        59° 2' 22.3" N
Longitude (NAD 83)                       158° 27' 25.9" W
Climate Zone                             B
Rain Zone                                2
Ground Elevation (AMSL)                  26.52 m / 87.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     TR - Transmit-Receive
Modulation                               Digital
Satellite Arc                            97° W to 145° West Longitude
Azimuth Range                            115.0° to 164.4°
Corresponding Elevation Angles           5.6° / 22.0°
Antenna Centerline (AGL)                 2.8 m / 9.2 ft
Antenna Information                            Receive                                    Transmit
Manufacturer                                   Patriot 3.8                                Patriot 3.8
Gain / Diameter                                42.0 dBi / 3.8 m                           46.1 dBi / 3.8 m
3-dB / 15-dB Beamwidth                         0.52° / 1.06°                              0.36° / 0.72°

                                                                                        6K72G7W - 36M0G7W
                                                                                        6K72D7W - 36M0D7W
Max Available RF Power        (dBW/4 kHz)                                                  -2.7    -16.52
                              (dBW/MHz)                                                    21.3      7.48

Maximum EIRP                  (dBW/4 kHz)                                                 43.4          29.58
                              (dBW/MHz)                                                   45.16         53.58
                              (dBW)                                                       45.16         69.12


Interference Objectives:    Long Term          -158.0 dBW/MHz           20%               -154.0 dBW/4 kHz           20%
                            Short Term         -148.0 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)               6K72G7W - 36M0G7W / 3700.0 - 4200.0        6K72G7W - 36M0G7W / 5925.0 - 6425.0
                                               6K72D7W - 36M0D7W / 3700.0 - 4200.0        6K72D7W - 36M0D7W / 5925.0 - 6425.0


Max Great Circle Coordination Distance         870.7 km / 541.0 mi                        380.5 km / 236.4 mi
Precipitation Scatter Contour Radius           610.5 km / 379.3 mi                        101.2 km / 62.9 mi




Frequency Coordination and Interference Analysis Report                         12/02/2010                  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             DILLINGHAM, AK
Licensee Name                     GCI Communication Corporation
Latitude (NAD 83)                 59° 2' 22.3" N
Longitude (NAD 83)                158° 27' 25.9" W
Ground Elevation (AMSL)           26.52 m / 87.0 ft
Antenna Centerline (AGL)          2.8 m / 9.2 ft
Antenna Mode                             Receive 4.0 GHz                           Transmit 6.1 GHz
Interference Objectives: Long Term       -158.0 dBW/MHz 20%                        -154.0 dBW/4 kHz         20%
                         Short Term      -148.0 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              114.88                  -10.00          437.80               -10.00         200.77
 5              0.00              109.91                  -10.00          437.80               -10.00         200.77
10              0.00              104.94                  -10.00          437.80               -10.00         200.77
15              0.00               99.96                  -10.00          437.80               -10.00         200.77
20              0.00               94.98                  -10.00          437.80               -10.00         200.77
25              0.00               90.01                  -10.00          437.80               -10.00         200.77
30              0.00               85.03                  -10.00          437.80               -10.00         200.77
35              0.00               80.06                  -10.00          437.80               -10.00         200.77
40              0.00               75.08                  -10.00          437.80               -10.00         200.77
45              0.00               70.11                  -10.00          437.80               -10.00         200.77
50              0.00               65.13                  -10.00          437.80               -10.00         200.77
55              0.00               60.16                  -10.00          437.80               -10.00         200.77
60              0.00               55.20                  -10.00          437.80               -10.00         200.77
65              0.00               50.23                  -10.00          437.80               -10.00         200.77
70              0.00               45.28                   -9.40          445.83                -9.40         204.23
75              0.00               40.33                   -8.14          463.04                -8.14         211.60
80              0.00               35.39                   -6.72          482.62                -6.72         220.15
85              0.00               30.47                   -5.10          506.90                -5.10         230.28
90              0.00               25.58                   -3.20          536.78                -3.20         242.56
95              0.00               20.74                   -0.92          574.78                -0.92         257.90
100             0.00               15.99                    1.91          625.14                 1.91         276.71
105             0.00               11.44                    5.54          694.84                 5.54         306.02
110             0.00                7.49                   10.14          793.47                10.14         347.63
115             0.00                5.57                   13.35          870.73                13.35         380.52
120             0.00                7.24                   10.51          801.87                10.51         351.27
125             0.00                9.46                    7.61          737.86                 7.61         324.26
130             0.00               11.56                    5.43          692.64                 5.43         305.10
135             0.00               13.54                    3.71          658.53                 3.71         290.80
140             0.00               15.38                    2.33          632.31                 2.33         279.92
145             0.00               17.06                    1.20          612.28                 1.20         271.43
150             0.00               18.56                    0.29          595.86                 0.29         264.76
155             0.00               19.86                   -0.45          582.91                -0.45         259.53
160             0.00               20.95                   -1.03          572.85                -1.03         257.13
165             0.00               21.82                   -1.47          565.32                -1.47         254.11
170             0.00               22.62                   -1.86          558.74                -1.86         251.46
175             0.00               24.26                   -2.62          546.14                -2.62         246.36
180             0.00               26.70                   -3.66          529.30                -3.66         239.50
185             0.00               29.75                   -4.84          510.92                -4.84         231.94




Frequency Coordination and Interference Analysis Report                12/02/2010            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             DILLINGHAM, AK
Licensee Name                     GCI Communication Corporation
Latitude (NAD 83)                 59° 2' 22.3" N
Longitude (NAD 83)                158° 27' 25.9" W
Ground Elevation (AMSL)           26.52 m / 87.0 ft
Antenna Centerline (AGL)          2.8 m / 9.2 ft
Antenna Mode                             Receive 4.0 GHz                           Transmit 6.1 GHz
Interference Objectives: Long Term       -158.0 dBW/MHz 20%                        -154.0 dBW/4 kHz         20%
                         Short Term      -148.0 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               33.23                   -6.04          492.71                -6.04         224.38
195             0.00               37.02                   -7.21          475.55                -7.21         217.17
200             0.00               41.04                   -8.33          460.39                -8.33         210.47
205             0.00               45.23                   -9.38          446.00                -9.38         204.30
210             0.00               49.53                  -10.00          437.80               -10.00         200.77
215             0.00               53.93                  -10.00          437.80               -10.00         200.77
220             0.00               58.39                  -10.00          437.80               -10.00         200.77
225             0.00               62.91                  -10.00          437.80               -10.00         200.77
230             0.00               67.46                  -10.00          437.80               -10.00         200.77
235             0.00               72.05                  -10.00          437.80               -10.00         200.77
240             0.00               76.65                  -10.00          437.80               -10.00         200.77
245             0.00               81.28                  -10.00          437.80               -10.00         200.77
250             0.00               85.91                  -10.00          437.80               -10.00         200.77
255             0.00               90.55                  -10.00          437.80               -10.00         200.77
260             0.00               95.18                  -10.00          437.80               -10.00         200.77
265             0.00               99.81                  -10.00          437.80               -10.00         200.77
270             0.00              104.43                  -10.00          437.80               -10.00         200.77
275             0.00              109.04                  -10.00          437.80               -10.00         200.77
280             0.00              113.61                  -10.00          437.80               -10.00         200.77
285             0.00              118.16                  -10.00          437.80               -10.00         200.77
290             0.00              122.67                  -10.00          437.80               -10.00         200.77
295             0.00              127.12                  -10.00          437.80               -10.00         200.77
300             0.00              131.49                  -10.00          437.80               -10.00         200.77
305             0.00              135.77                  -10.00          437.80               -10.00         200.77
310             0.00              139.92                  -10.00          437.80               -10.00         200.77
315             0.00              143.89                  -10.00          437.80               -10.00         200.77
320             0.00              147.62                  -10.00          437.80               -10.00         200.77
325             0.00              149.54                  -10.00          437.80               -10.00         200.77
330             0.00              144.62                  -10.00          437.80               -10.00         200.77
335             0.00              139.69                  -10.00          437.80               -10.00         200.77
340             0.00              134.74                  -10.00          437.80               -10.00         200.77
345             0.00              129.78                  -10.00          437.80               -10.00         200.77
350             0.00              124.82                  -10.00          437.80               -10.00         200.77
355             0.00              119.85                  -10.00          437.80               -10.00         200.77




Frequency Coordination and Interference Analysis Report                12/02/2010            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: December 02, 2010




Frequency Coordination and Interference Analysis Report   12/02/2010   Page 10 of 10



Document Created: 2010-12-02 14:24:34
Document Modified: 2010-12-02 14:24:34

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