Attachment KACS Cband Freq

This document pretains to SES-REG-20180927-04084 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREG2018092704084_1540847

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                         Prepared for
           Chehalis Valley Educational Foundation
                       CHEHALIS, WA
                   Satellite Earth Station




                        Prepared By:
                       COMSEARCH
                19700 Janelia Farm Boulevard
                     Ashburn, VA 20147
                        July 06, 2018


                                                  TABLE OF CONTENTS
1.   CONCLUSIONS ...
2.   SUMMARY OF RESULTS ....
3.   SUPPLEMENTAL SHOWING ..
4.   EARTH STATION COORDINATION DATA..
5.   CERTIFICGATION .:. 22000 ee en everererrmcrrnenrmeneevrvenrererennerseererervereenene




Frequency Coordination and Interference Analysis Report                                      07/06/2018   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   07/06/2018          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.

The following companies reported potential great circle interference conflicts that did not
meet the objectives on a lins—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.




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




Frequency Coordination and Interference Analysis Report          07/06/2018            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 07/06/2018.




        Comsearch




Frequency Coordination and Interference Analysis Report                 07/06/2018              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            07/06/2018             Page 6 of 10


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

Date:                                     07/06/2018
Job Number:                               180706COMSFB11
Administrative Information
Status                                    ENGINEER PROPOSAL
Call Sign
Licensee Code                             CHEVBD
Licensee Name                             Chehalis Valley Educational Foundation

Site Information                          CHEHALIS, WA
Venue Name
Latitude (NAD 83)                         46° 41‘ 25.7" N
Longitude (NAD 83)                        122° 57 27.0" W
Climate Zone                              A
Rain Zone                                 3
Ground Elevation (AMSL)                   51.37 m / 168.6 ft
Link Information
Satellite Type                            Geostationary
Mode                                      RO — Receive—Only
Modulation                                Digital
Satellite Arc                             60° W to 143° West Longitude
Azimuth Range                             110.4° to 206.6°
Corresponding Elevation Angles            9.6° / 32.8°
Antenna Centerline (AGL)                  2.74 m / 9.0 ft

Antenna Information                              Receive — Patriot 3.8m
Manufacturer                                    PATRIOT
Model                                           PRT380
Gain / Diameter                                 42.1 dBi/ 3.8 m
3—0B / 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)                3GMOGZW / 3700.0 — 4200.0


Max Great Circle Coordination Distance          398.0 km / 247.3 mi
Precipitation Scatter Contour Radius            391.4 km / 243.2 mi




Frequency Coordination and Interference Analysis Report                       07/06/2018         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               CHEHALIS, WA
Licensee Name                     Chehalis Valley Educational Foundation
Latitude (NAD 83)                 46° 41‘ 25.7" N
Longitude (NAD 83)                122° 57 27.0" W
Ground Efevation (AMSL)           51.37 m / 168.6 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
Antenna Model                     PRT380
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               0.71                  110.12                 —9.90          237.00
 5               0.00                  105.16                 ~9.90          285.92
 10              0.00                  100.23                 —9.90          285.92
 15              1.32                  95.32                  —9.90          211.21
 20             1.84                   90.38                 —9.90           199.37
 25             2.53                   85.41                 —9.90           182.78
 30             2.27                   80.46                 —9.90           188.81
 35             210                    75.51                 —9.90           192.60
 40             2.22                   70.55                 —9.90           189.98
 45             3.31                   65.54                 —9.90           162.94
 50             417                    60.53                 —9.90           145.75
 55             4.48                   55.54                 —9.90           141.16
 60             5.31                   50.51                 —9.90           132.26
 65             6.04                   45.49                 —9.00           128.68
 70             6.76                   40.46                 —1.99           124.85
 75             6.62                   35.49                 —7.00           130.47
 80             6.47                   30.52                 —5.11           138.76
 85             6.59                   25.55                 —3.12           146.57
 90             6.76                   20.57                 ~1.13           154.54
 95             7.27                   15.55                  1.77           164.51
100             7.81                   10.53                  6.57           188.92
105             8.29                    5.54                 10.03           204.33
110             8.73                    0.94                 29.90           398.04
115             8.86                    3.47                 15.22           228.01
120             8.89                    6.50                  8.60           189.92
125             8.40                    9.84                  7.26           186.54
130             8.02                   12.97                  4.13           170.93
135             749                    16.07                  1.46           159.67
140             6.79                   19.16                 —0.39           158.22
145             5.57                   22.53                 1.91            165.88
150             5.04                   25.08                 —2.93           166.80
155             4.07                   27.82                 ~4.03           179.09
160             3.79                   29.64                 —4.76           180.89
165             3.79                   30.88                 —5.25           178.27
170             3.72                   31.86                 —5.64           177.75
175             3.62                   32.50                 —5.90           178.52
180             2.79                   33.52                 —6.31           194.71
185             2.26                   33.86                 —6.45           205.43




Frequency Coordination and Interference Analysis Report                   07/06/2018         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              CHEHALIS, WA
Licensee Name                    Chehalis Valley Educational Foundation
Latitude (NAD 83)                46° 41‘ 25.7" N
Longitude (NAD 83)                122° 57 27.0" W
Ground Elevation (AMSL)           §1.37 m / 168.6 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
Antenna Model                     PRT380
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              1.85              33.70                  —6.38           212.99
195              1.88              32.73                  —5.99           214.15
200             2.31               31.15                  —5.36           207.08
205              111               31.75                  5.60            240.88
210             0.37               32.61                  —5.94           290.79
215             0.00               33.76                  —6.40           309.20
220             0.00               35.16                  —6.93           305.55
225             0.33               36.82                  —7.26           286.61
230             0.53               39.11                  —7.72           261.67
235             0.68               41.84                  —8.27           248.27
240             0.85               44.89                  —8.88           234.46
245             0.91               48.28                  —9.56           227.61
250             0.96               51.88                  9.90            222.80
255             1.26               55.53                  —9.90           213.01                         i
260             1.53               59.35                  —9.90           205.35                         |
265             143                63.41                  —9.90           207.93                         }
270             1.43               67.51                  —9.90           208.04                         |
275             1.52               71.65                  —9.90           205.58
280             1.37               75.87                  —9.90           209.66
285             1.35               80.10                  —9.90           210.21
290             0.96               84.38                  —9.90           223.08
295             0.88               88.62                  —9.90           227.53
300             0.87               92.86                  —9.90           228.01
305             0.66               97.08                  —9.90           239.96
310             0.44              101.27                  —9.90           257.33
315             0.26              105.41                  —9.90           278.65
320             0.00              109.48                  —9.90           285.92
325             0.00              113.54                  —9.90           285.92
330             0.00              117.54                  —9.90           285.92
335             0.00              121.45                  —9.90           285.92
340             0.00              125.25                  —9.90           285.92
345             0.48              124.87                  —9.90           252.71
350             0.84              119.99                  —9.90           229.35
355             0.81              115.06                  —9.90           231. 47




Frequency Coordination and Interference Analysis Report                07/06/2018         Page 9 of 10


5. CERTIFICATION




| HEREBY CERTIFY THAT | AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE
PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION,
THAT | 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 ISs COMPLETE AND CORRECT TO THE BEST OF MY
KNOWLEDGE AND BELIEF.




BY:

Franco R. Benedict
Coordinator
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, VA 20147


DATED: July 06, 2018




Frequency Coordination and Interference Analysis Report   07/06/2018   Page 10 of 10


                                                                                         Page 1 of 3
                                                       COMSEARCH
                                                Earth Station Data Sheet
                                       19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                         (571)246—3097 http://www.comsearch.com


Date:                             07/06/2018
Job Number:                       180706COMSFB11
Administrative Information
Status                            ENGINEER PROPOSAL
Call Sign
Licensee Code                     CHEVBD
Licensee Name                     Chehalis Valley Educational Foundation

Site Information                  CHEHALIS, WA
Venue Name
Latitude (NAD 83)                 46° 41‘ 25.7" N
Longitude (NAD 83)                122° 57 27.0" W
Climate Zone                      A
Rain Zone                         3
Ground Elevation (AMSL)           51.37 m / 168.6 ft
Link Information
Satellite Type                    Geostationary
Mode                              RO — Receive—Only
Modulation                        Digital
Satellite Arc                     60° W to 143° West Longitude
Azimuth Range                     110.4° to 206.6°
Corresponding Elevation Angles    9.6° / 32.8°
Antenna Centerline (AGL)          2.74 m / 9.0 ft
Antenna Information                     Receive — Patriot 3.8m
Manufacturer                            PATRIOT
Model                                   PRT380
Gain / Diameter                         42.1 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)        36MOG7W / 3700.0 — 4200.0


Max Great Circle Coordination Distance 398.0 kim / 247.3 mi
Precipitation Scatter Contour Radius   391.4 km / 243.2 mi


                                                                                           Page 2 of 3
                                                       COMSEARCH
                                                 Earth Station Data Sheet
                                         19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                           (571)246—3097 hitp://www.comsearch.com



Coordination Values               CHEHALIS, WA
Licensee Name                     Chehalis Valley Educational Foundation
Latitude (NAD 83)                 46° 41‘ 25.7"_ N
Longitude (NAD 83)                122° 57 27.0" W
Ground Elevation (AMSL)           51.37 m / 168.6 ft
Antenna Centertine (AGL)          2.74 m / 9.0 ft
Antenna Model                     PRT380
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              0.71                 110.12                —9.90         237.00
  5             0.00                  105.16                —9.90         285.92
 10             0.00                  100.23                —9.90         285.92
 15              1.32                  95.32                —9.90         211.21
 20              1.84                 90.38                 ~9.90         199.37
 25             2.53                  85.41                 —9.90         182.78
 30             2.27                  80.46                 —9.90         188.81
 35             2.10                  75.51                 —9.90         192.60
 40             2.22                  70.55                 —9.90         189.98
 45             3.31                  65.54                 ~9.90         162.94
 50             4.17                  60.53                 —9.90         145.75
 55             4.48                  55.54                 —9.90         141.16
 60             5.31                  50.51                 —9.90         132.26
 65             6.04                  4549                  —9.00         128.68
 70             6.76                  40.46                 —7.99         124.85
 75             6.62                  35.49                 —7.00         130.47
 80             6.47                  30.52                 —5.11         138.76
 85             6.59                  25.55                 ~3.12         146.57
 90             6.76                  20.57                 —1.13         154.54
 95             7.27                  15.55                  1.77         164.51
100             7.81                  10.53                  6.57         188.92
105             8.29                   5.54                 10.03         204.33
110             8.73                   0.94                 29.90         398.04
115             8.86                   347                  15.22         228.01
120             8.89                   6.50                  8.60         189.92
125             8.40                   9.84                  7.26         186.54
130             8.02                  12.97                  4.13         170.93
135             7.49                  16.07                  1.46         159.67
140             6.79                  19.16                 —0.39         158.22
145             5.57                  22.53                 —1.91         165.88
150             5.04                  25.08                 —2.93         166.80
155             4.07                  27.82                 ~4.03         179.09
160             3.79                  29.64                 ~4.76         180.89
165             3.79                  30.88                 —5.25         178.27
170             3.72                  31.86                 5.64          177.75
175             3.62                  32.50                 —5.90         178.52
180             2.79                  33.52                 —6.31         194.71
185             2.26                  33.86                 —6.45         205.43


                                                                                          Page 3 of 3
                                                      COMSEARCH
                                                Earth Station Data Sheet
                                        19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                          (571)246—3097 http:/f/www.comsearch.com



Coordination Values              CHEHALIS, WA
Licensee Name                    Chehalis Valley Educational Foundation
Latitude (NAD 83)                46° 41‘ 25.7" N
Longitude (NAD 83)               122° 57 27.0" W
Ground Elevation (AMSL)          51.37 m / 168.6 ft
Antenna Centerline (AGL)         2.74 m / 9.0 ft
Antenna Model                    PRT380
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             1.85                 33.70               —6.38     212.99
 195             1.88                 32.73               —5.99     214.15
200              2.31                 31.15               —5.36     207.08
205              1.11                 31.75               5.60      240.88
210              0.37                 32.61               —5.94     290.79
215              0.00                 33.76               —6.40     309.20
220              0.00                 35.16               —6.93     305.55
225              0.33                 36.82               —7.26     286.61
230              0.53                 39.11               —7.72     261.67
235              0.68                 41.84               —8.27     248.27
240              0.85                 44.89               —8.88     234.46
245              0.91                 48.28               —9.56     227.61
250              0.96                 51.88               —9.90     222.80
255              1.26                 55.53               —9.90     213.01
260              1.53                 59.35               —9.90     205.35
265              1.43                 63.41               —9.90     207.93
270              1.43                 67.51               —9.90     208.04
275              1.52                 71.65               —9.90     205.58
280              1.37                 75.87               —9.90     209.66
285              1.35                 80.10               —9.90     210.21
290              0.96                 84.38               —9.90     223.08
295              0.88                 88.62               —9.90     227.53
300              0.87                 92.86               —9.90     228.01
305              0.66                 97.08               —9.90     239.96
310              0.44                101.27               —9.90     257.33
315              0.26                105.41               —9.90     278.65
320             0.00                 109.48               —9.90     285.92
325             0.00                 113.54               —9.90     285.92
330             0.00                 117.54               —9.90     285.92
335             0.00                 121.45               —9.90     285.92
340             0.00                 125.25               —9.90     285.92
345             0.48                 124.87               —9.90     252.71
350             0.84                 119.99               —9.90     229.35
355             0.81.                115.06               —9.90     231.47


July 06, 2018
Re:     Chehalis Valley Educational Foundation
        CHEHALIS, WA
        C—Band Receive Only Earth Station
        Job Number: 180706COMSFB11

Dear Frequency Coordinator:

This notice is being provided in accordance with Section 25.203(c) of the FCC Rules and Regulations.
We are forwarding the attached coordination data on behalf of Chehalis Valley Educational Foundation,
Unit A 2451 N.E. Kresky Chehalis, WA 98532 for a C—Band Receive Only Earth Station to be located in
CHEHALIS, WA.

The coordination notice is being circulated to the owners (or their protection agents) of all existing or
proposed terrestrial facilities operating in a shared frequency band within the coordination contours of the
proposed station(s).

We respectfully request that you examine this data for its interference potential with your system(s). In the
event that your analysis identifies potential interference cases that have not been resolved, please
contact us by August 10, 2018.

If there are any questions concerning this coordination notice, please contact Comsearch.


Sincerely,

COMSEARCH



Franco R. Benedict
Coordinator
fbenedic@comsearch.com


Enclosure(s)



Document Created: 2018-09-27 13:55:53
Document Modified: 2018-09-27 13:55:53

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC