Attachment Freq Coord

This document pretains to SES-MOD-20101021-01308 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010102101308_845986

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                       Prepared for
            Liberty Broadcasting Network, Inc
                    LYNCHBURG, VA
                  Satellite Earth Station




                      Prepared By:
                     COMSEARCH
              19700 Janelia Farm Boulevard
                  Ashburn, VA 20147
                    October 13, 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                                             10/13/2010                        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   10/13/2010         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

       Alltel Communications of Virginia #1 LLC
       Cellco Partnership - Southern Virginia
       USCOC of Virginia RSA #3, Inc.



No other carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report    10/13/2010         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.

        Company
        AT&T COMMUNICATIONS OF VIRGINIA INC
        Alltel Communications of Virginia #1 LLC
        Alltel Communications of Virginia, Inc.
        Bellsouth Telecommunications, Inc.
        Carolina Power & Light Company
        Cellco Partnership - Southern Virginia
        Cellco Partnership-Newark-Dallas Verizon
        County of Franklin, VA
        METROPOLITAN AREA NETWORKS, INC.
        Mecklenburg Electric Cooperative
        NTELOS Telephone, Inc.
        National Radio Astronomy Observatory
        Norfolk Southern Railway
        Peach Acquisitions LLC
        ROANOKE COUNTY
        Roanoke, City of
        South & Central Wireless, LLC - SOVA
        USCOC of Virginia RSA #2, Inc.
        USCOC of Virginia RSA #3, Inc.
        Virginia Cellular LLC
        Virginia Department of State Police
        Virginia Electric & Power Company
        Virginia PCS Alliance, L.C.
        Virginia RSA #7, Inc.




Frequency Coordination and Interference Analysis Report                 10/13/2010       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            10/13/2010            Page 6 of 10


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

Date:                                    10/13/2010
Administrative Information
Call Sign                                E881163
Licensee Name                            Liberty Broadcasting Network, Inc
Site Information                         LYNCHBURG, VA
Latitude (NAD 83)                        37° 21' 17.5" N
Longitude (NAD 83)                       79° 10' 49.1" W
Climate Zone                             A
Rain Zone                                2
Ground Elevation (AMSL)                  240.79 m / 790.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     TR - Transmit-Receive
Modulation                               Digital
Satellite Arc                            65° W to 143° West Longitude
Azimuth Range                            157.4° to 253.4°
Corresponding Elevation Angles           44.2° / 12.0°
Antenna Centerline (AGL)                 6.1 m / 20.0 ft
Antenna Information                            Receive - A40911                       Transmit - A6091E
Manufacturer                                   ANDREW CORPORATION                     ANDREW CORPORATION
Model                                          ESA91-46                               ESA91-46
Gain / Diameter                                50.7 dBi / 9.1 m                       53.9 dBi / 9.1 m
3-dB / 15-dB Beamwidth                         0.50° / 1.00°                          0.32° / 0.62°


                                                                                     51K2G7W - 36M0G7W
Max Available RF Power        (dBW/4 kHz)                                              -13.01   -13.01
                              (dBW/MHz)                                                 -1.94    10.99

Maximum EIRP                  (dBW/4 kHz)                                              40.89    40.89
                              (dBW/MHz)                                                51.96    64.89
                              (dBW)                                                    51.96    80.43

Interference Objectives:    Long Term          -150.0 dBW/MHz        20%              -154.0 dBW/4 kHz       20%
                            Short Term         -130.0 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)               51K2G7W - 36M0G7W / 3700.0 - 4200.0    51K2G7W - 36M0G7W / 5925.0 - 6425.0


Max Great Circle Coordination Distance         189.1 km / 117.5 mi                    121.1 km / 75.3 mi
Precipitation Scatter Contour Radius           399.2 km / 248.0 mi                    100.0 km / 62.1 mi




Frequency Coordination and Interference Analysis Report                      10/13/2010            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             LYNCHBURG, VA
Licensee Name                     Liberty Broadcasting Network, Inc
Latitude (NAD 83)                 37° 21' 17.5" N
Longitude (NAD 83)                79° 10' 49.1" W
Ground Elevation (AMSL)           240.79 m / 790.0 ft
Antenna Centerline (AGL)          6.1 m / 20.0 ft
Antenna Model                     ANDREW CORPORATION ESA91-46
Antenna Mode                             Receive 4.0 GHz                           Transmit 6.1 GHz
Interference Objectives: Long Term       -150.0 dBW/MHz 20%                        -154.0 dBW/4 kHz         20%
                         Short Term      -130.0 dBW/MHz 0.01%                      -131.0 dBW/4 kHz         0.0025%
 Max Available RF Power                                                            -13.0 (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              0.60              106.27                  -10.30          170.61                -10.10         106.33
 5              1.55              111.23                  -10.79          131.97                -12.57         100.00
10              1.55              116.13                  -12.98          124.33                -20.10         100.00
15              2.96              121.17                  -15.30          100.00                -20.10         100.00
20              2.96              123.61                  -15.30          100.00                -20.10         100.00
25              2.96              120.47                  -15.30          100.00                -20.10         100.00
30              2.96              117.18                  -13.61          100.00                -20.10         100.00
35              3.97              114.15                  -11.96          100.00                -18.40         100.00
40              3.97              110.57                  -10.53          100.00                -11.24         100.00
45              3.91              106.90                  -10.30          100.00                -10.10         100.00
50              5.02              103.40                  -10.30          100.00                -10.10         100.00
55              5.02               99.58                  -10.30          100.00                -10.10         100.00
60              4.60               95.69                  -10.30          100.00                -10.10         100.00
65              5.22               91.86                  -10.30          100.00                -10.10         100.00
70              5.22               87.97                  -10.30          100.00                -10.10         100.00
75              4.94               84.12                  -10.30          100.00                -10.10         100.00
80              5.48               80.19                  -10.30          100.00                -10.10         100.00
85              5.59               76.33                  -10.30          100.00                -10.10         100.00
90              5.60               72.51                  -10.30          100.00                -10.10         100.00
95              5.92               68.66                  -10.30          100.00                -10.10         100.00
100             6.95               64.60                  -10.30          100.00                -10.10         100.00
105             6.95               60.93                  -10.30          100.00                -10.10         100.00
110             8.07               56.85                  -10.30          100.00                -10.10         100.00
115             8.07               53.38                  -10.30          100.00                -10.10         100.00
120             7.87               50.20                  -10.30          100.00                -10.10         100.00
125             8.42               46.75                   -9.65          100.00                -10.10         100.00
130             8.42               43.91                   -9.08          100.00                -10.10         100.00
135             7.47               42.17                   -8.73          100.00                -10.10         100.00
140             7.91               39.71                   -8.24          100.00                -10.10         100.00
145             7.91               38.07                   -7.91          100.00                -10.10         100.00
150             6.83               37.98                   -7.90          100.00                -10.10         100.00
155             7.13               37.12                   -7.72          100.00                -10.10         100.00
160             6.27               38.00                   -7.90          100.00                -10.10         100.00
165             6.27               38.56                   -8.01          100.00                -10.10         100.00
170             6.07               39.74                   -8.25          100.00                -10.10         100.00
175             6.07               40.41                   -8.38          100.00                -10.10         100.00
180             5.22               41.47                   -8.59          100.00                -10.10         100.00
185             5.22               41.24                   -8.55          100.00                -10.10         100.00



Frequency Coordination and Interference Analysis Report                10/13/2010             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             LYNCHBURG, VA
Licensee Name                     Liberty Broadcasting Network, Inc
Latitude (NAD 83)                 37° 21' 17.5" N
Longitude (NAD 83)                79° 10' 49.1" W
Ground Elevation (AMSL)           240.79 m / 790.0 ft
Antenna Centerline (AGL)          6.1 m / 20.0 ft
Antenna Model                     ANDREW CORPORATION ESA91-46
Antenna Mode                             Receive 4.0 GHz                           Transmit 6.1 GHz
Interference Objectives: Long Term       -150.0 dBW/MHz 20%                        -154.0 dBW/4 kHz         20%
                         Short Term      -130.0 dBW/MHz 0.01%                      -131.0 dBW/4 kHz         0.0025%
 Max Available RF Power                                                            -13.0 (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             4.26               41.50                   -8.60          100.00                -10.10         100.00
195             4.34               40.26                   -8.35          100.00                -10.10         100.00
200             3.29               39.60                   -8.22          105.86                -10.10         100.00
205             3.29               37.55                   -7.81          107.43                -10.10         100.00
210             3.29               35.14                   -7.33          109.28                -10.10         100.00
215             2.44               33.07                   -6.91          126.70                -10.10         100.00
220             2.44               30.07                   -6.31          128.97                -10.10         100.00
225             1.06               27.83                   -5.87          164.78                -10.10         100.00
230             1.06               24.43                   -5.19          169.83                -10.10         100.00
235             1.09               20.86                   -4.47          172.03                -10.10         100.00
240             1.26               17.10                   -3.72          170.28                 -7.78         100.00
245             1.32               13.57                   -0.87          181.54                 -4.67         100.00
250             2.07               10.51                    4.19          184.27                 -3.10         100.00
255             1.99               10.17                    4.53          187.93                 -3.10         100.00
260             2.16               11.86                    1.98          171.06                 -3.96         100.00
265             2.16               15.19                   -3.34          144.55                 -6.25         100.00
270             1.85               19.41                   -4.18          148.73                 -9.62         100.00
275             2.35               23.58                   -5.02          134.32                -10.10         100.00
280             2.78               28.06                   -5.91          124.14                -10.10         100.00
285             2.41               32.90                   -6.88          127.29                -10.10         100.00
290             2.53               37.65                   -7.83          121.40                -10.10         100.00
295             2.78               42.44                   -8.79          113.20                -10.10         100.00
300             2.35               47.38                   -9.78          117.68                -10.10         100.00
305             1.97               52.31                  -10.30          123.49                -10.10         100.00
310             2.17               57.17                  -10.30          119.34                -10.10         100.00
315             2.03               62.08                  -10.30          122.15                -10.10         100.00
320             1.81               67.00                  -10.30          127.15                -10.10         100.00
325             1.88               71.91                  -10.30          125.69                -10.10         100.00
330             1.40               76.85                  -10.30          136.12                -10.10         100.00
335             1.00               81.77                  -10.30          147.03                -10.10         100.00
340             0.37               86.68                  -10.30          189.13                -10.10         121.14
345             0.66               91.58                  -10.30          165.61                -10.10         103.83
350             0.60               96.48                  -10.30          170.89                -10.10         106.54
355             0.67              101.38                  -10.30          165.08                -10.10         103.42




Frequency Coordination and Interference Analysis Report                10/13/2010             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: October 13, 2010




Frequency Coordination and Interference Analysis Report   10/13/2010   Page 10 of 10



Document Created: 2010-10-13 15:11:01
Document Modified: 2010-10-13 15:11:01

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