Attachment Attachment 2

This document pretains to SES-REG-20180828-04109 for Earth Station Registration on a Satellite Earth Station filing.


FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                     Prepared for
             Centennial Licensing II, LLC
               FREDERICKSBURG, VA
                Satellite Earth Station




                     Prepared By:
                    COMSEARCH
             19700 Janelia Farm Boulevard
                 Ashburn, VA 20147
                    June 25, 2018


                                                      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                                             06/25/2018                        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   06/25/2018         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.




Frequency Coordination and Interference Analysis Report    06/25/2018         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 06/24/2018.

        Company
        MCI Communications Services Inc.




Frequency Coordination and Interference Analysis Report                 06/25/2018              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            06/25/2018            Page 6 of 10


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

Date:                                    06/25/2018
Job Number:                              180624COMSGE01
Administrative Information
Status                                   ENGINEER PROPOSAL
Call Sign
Licensee Code                            CENLIC
Licensee Name                            Centennial Licensing Ii, LLC

Site Information                         FREDERICKSBU, VA
Venue Name
Latitude (NAD 83)                        38° 16' 50.0" N
Longitude (NAD 83)                       77° 26' 10.0" W
Climate Zone                             A
Rain Zone                                2
Ground Elevation (AMSL)                  11.34 m / 37.2 ft

Link Information
Satellite Type                           Geostationary
Mode                                     RO - Receive-Only
Modulation                               Digital
Satellite Arc                            60° W to 143° West Longitude
Azimuth Range                            153.1° to 254.3°
Corresponding Elevation Angles           42.0° / 10.4°
Antenna Centerline (AGL)                 2.74 m / 9.0 ft

Antenna Information                             Receive - C40381
Manufacturer                                    COMTECH ANTENNA SYSTEMS
Model                                           3.8 METER PF
Gain / Diameter                                 42.9 dBi / 3.8 m
3-dB / 15-dB Beamwidth                          1.40° / 2.80°

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)                36M0G7W / 3700.0 - 4200.0


Max Great Circle Coordination Distance          400.1 km / 248.6 mi
Precipitation Scatter Contour Radius            538.1 km / 334.3 mi




Frequency Coordination and Interference Analysis Report                       06/25/2018        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             FREDERICKSBU, VA
Licensee Name                     Centennial Licensing Ii, LLC
Latitude (NAD 83)                 38° 16' 50.0" N
Longitude (NAD 83)                77° 26' 10.0" W
Ground Elevation (AMSL)           11.34 m / 37.2 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
Antenna Model                     COMTECH ANTENNA SYSTEMS 3.8 METER PF
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              1.67              105.54                   -8.10          209.84
 5              1.70              110.48                   -8.10          208.94
 10             1.76              115.41                   -8.26          206.51
 15             2.33              120.39                  -10.18          186.18
 20             2.59              121.85                  -10.47          178.62
 25             2.47              118.41                   -9.46          186.39
 30             2.27              114.83                   -8.10          197.35
 35             2.16              111.20                   -8.10          199.91
 40             2.35              107.58                   -8.10          195.56
 45             1.88              103.75                   -8.10          206.49
 50             2.39              100.06                   -8.10          194.81
 55             2.38               96.24                   -8.10          195.02
 60             2.35               92.40                   -8.10          195.67
 65             2.12               88.56                   -8.10          200.69
 70             1.76               84.76                   -8.10          207.40
 75             1.61               80.99                   -8.10          211.54
 80             1.61               77.23                   -8.10          211.54
 85             1.61               73.52                   -8.10          211.53
 90             1.61               69.87                   -8.10          211.54
 95             1.61               66.30                   -8.10          211.54
100             1.61               62.82                   -8.10          211.54
105             1.61               59.47                   -8.10          211.54
110             1.61               56.25                   -8.10          211.54
115             1.61               53.22                   -8.10          211.42
120             1.61               50.40                   -8.10          211.54
125             1.16               48.19                   -8.10          225.15
130             0.86               46.21                   -8.10          238.60
135             0.66               44.52                   -8.10          250.83
140             0.00               43.68                   -8.10          297.65
145             0.00               42.68                   -8.17          297.17
150             0.23               41.92                   -7.87          295.69
155             0.00               42.08                   -7.93          298.76
160             0.29               42.22                   -7.99          287.05
165             0.20               43.20                   -8.38          295.60
170             0.35               44.25                   -8.80          274.23
175             0.32               45.07                   -9.11          276.50
180             0.39               45.26                   -9.15          267.37
185             0.42               44.97                   -9.09          264.35




Frequency Coordination and Interference Analysis Report                06/25/2018        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             FREDERICKSBU, VA
Licensee Name                     Centennial Licensing Ii, LLC
Latitude (NAD 83)                 38° 16' 50.0" N
Longitude (NAD 83)                77° 26' 10.0" W
Ground Elevation (AMSL)           11.34 m / 37.2 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
Antenna Model                     COMTECH ANTENNA SYSTEMS 3.8 METER PF
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             0.55               44.06                   -8.73          254.30
195             0.74               42.62                   -8.15          245.56
200             0.76               40.89                   -7.46          247.89
205             0.83               38.74                   -6.85          247.49
210             0.75               36.35                   -6.37          255.50
215             0.74               33.62                   -6.10          257.90
220             0.68               30.68                   -6.10          261.41
225             0.69               27.49                   -5.09          267.76
230             0.60               24.19                   -3.78          282.22
235             0.59               20.70                   -2.38          292.84
240             0.67               17.05                    0.85          311.02
245             0.70               13.38                    5.13          343.70
250             0.71               10.58                    9.32          378.95
255             0.83                9.59                   10.31          400.12
260             0.89               11.08                    8.74          361.22
265             0.89               14.29                    3.61          317.60
270             0.80               18.36                   -0.46          292.01
275             0.77               22.76                   -3.20          274.62
280             0.68               27.38                   -5.05          268.22
285             0.57               32.11                   -6.10          269.37
290             0.58               36.87                   -6.47          266.07
295             0.53               41.70                   -7.78          261.39
300             0.54               46.54                   -8.10          258.55
305             0.51               51.42                   -8.10          260.50
310             0.43               56.31                   -8.10          268.91
315             0.34               61.22                   -8.10          280.51
320             0.41               66.11                   -8.10          271.27
325             0.43               71.03                   -8.10          268.72
330             0.88               75.92                   -8.10          237.23
335             0.95               80.85                   -8.10          233.05
340             1.08               85.78                   -8.10          227.51
345             1.22               90.71                   -8.10          223.18
350             1.17               95.65                   -8.10          224.82
355             1.59              100.60                   -8.10          212.12




Frequency Coordination and Interference Analysis Report                06/25/2018        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.




BY: _

Gary K. Edwards
Senior Manager
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, VA 20147


DATED: June 25, 2018




Frequency Coordination and Interference Analysis Report   06/25/2018   Page 10 of 10



Document Created: 2018-06-25 08:09:15
Document Modified: 2018-06-25 08:09:15

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