Attachment CoordinationReport

This document pretains to SES-REG-INTR2018-01894 for Earth Station Registration on a Satellite Earth Station filing.

IBFS_SESREGINTR201801894_1406783

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                        Prepared for
            Rural California Broadcasting Corp
                   ROHNERT PARK, CA
                   Satellite Earth Station




                       Prepared By:
                      COMSEARCH
               19700 Janelia Farm Boulevard
                   Ashburn, VA 20147
                      May 29, 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                                             05/29/2018                        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   05/29/2018         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.

No carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report    05/29/2018         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 05/29/2018.

        Company
        American Tower, LLC
        Pacific Bell Tel Com dba AT&T California




Frequency Coordination and Interference Analysis Report                 05/29/2018              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            05/29/2018            Page 6 of 10


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

Date:                                    05/29/2018
Job Number:                              180529COMSTC07
Administrative Information
Licensee Code                            S83350
Licensee Name                            Rural California Broadcasting Corp
Site Information                         ROHNERT PARK, CA
Venue Name                               KRCB-FM
Latitude (NAD 83)                        38° 21' 14.2" N
Longitude (NAD 83)                       122° 43' 8.2" W
Climate Zone                             B
Rain Zone                                3
Ground Elevation (AMSL)                  29.73 m / 97.5 ft
Link Information
Satellite Type                           Geostationary
Mode                                     RO - Receive-Only
Modulation                               Digital
Satellite Arc                            58° W to 143° West Longitude
Azimuth Range                            106.3° to 210.8°
Corresponding Elevation Angles           11.0° / 40.8°
Antenna Centerline (AGL)                 2.74 m / 9.0 ft
Antenna Information                             Receive
Manufacturer                                    DH Satellite
Model                                           38DH460A
Gain / Diameter                                 41.7 dBi / 3.7 m
3-dB / 15-dB Beamwidth                          1.40° / 2.40°

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)                30K0G7W - 36M0G7W / 3700.0 - 4200.0
                                                30K0G3W - 36M0G3W / 3700.0 - 4200.0


Max Great Circle Coordination Distance          512.1 km / 318.2 mi
Precipitation Scatter Contour Radius            386.2 km / 239.9 mi




Frequency Coordination and Interference Analysis Report                       05/29/2018        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              ROHNERT PARK, CA
Licensee Name                     Rural California Broadcasting Corp
Latitude (NAD 83)                 38° 21' 14.2" N
Longitude (NAD 83)                122° 43' 8.2" W
Ground Elevation (AMSL)           29.73 m / 97.5 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
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               0.00              106.03                 -10.00          412.20
 5               0.00              101.12                 -10.00          412.20
 10              0.00               96.22                 -10.00          412.20
 15              0.26               91.31                 -10.00          391.95
 20              0.85               86.39                 -10.00          270.49
 25              1.58               81.45                 -10.00          220.81
 30              2.46               76.49                 -10.00          182.53
 35              3.34               71.51                 -10.00          155.66
 40              3.47               66.55                 -10.00          152.30
 45              3.38               61.62                 -10.00          154.71
 50              3.29               56.68                 -10.00          156.84
 55              3.09               51.77                 -10.00          162.09
 60              2.46               46.94                  -9.79          183.55
 65              2.07               42.13                  -8.61          205.45
 70              1.83               37.33                  -7.30          225.63
 75              1.56               32.60                  -5.83          251.34
 80              1.53               27.88                  -4.13          264.45
 85              1.69               23.20                  -2.14          269.99
 90              1.77               18.72                   0.19          284.28
 95              1.58               14.72                   2.81          321.16
100              1.47               11.45                   5.53          356.92
105              0.85               10.27                   6.71          448.26
110              0.86               10.81                   6.16          438.26
115              0.62               13.52                   3.73          458.57
120              0.60               17.07                   1.20          426.92
125              0.31               20.86                  -0.98          494.37
130              0.00               24.57                  -2.76          512.11
135              0.00               27.93                  -4.15          491.03
140              0.00               31.13                  -5.33          473.89
145              0.00               34.13                  -6.33          460.44
150              0.00               36.89                  -7.17          448.87
155              0.27               39.13                  -7.81          414.64
160              0.78               40.81                  -8.27          295.72
165              0.88               42.42                  -8.69          278.05
170              0.76               43.78                  -9.03          290.79
175              0.75               44.56                  -9.22          291.39
180              0.98               44.59                  -9.23          260.73
185              1.15               44.17                  -9.13          251.25




Frequency Coordination and Interference Analysis Report                05/29/2018        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              ROHNERT PARK, CA
Licensee Name                     Rural California Broadcasting Corp
Latitude (NAD 83)                 38° 21' 14.2" N
Longitude (NAD 83)                122° 43' 8.2" W
Ground Elevation (AMSL)           29.73 m / 97.5 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
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              1.21               43.35                  -8.92          249.17
195              0.96               42.34                  -8.67          267.16
200              0.79               41.18                  -8.37          293.10
205              1.09               40.04                  -8.06          261.20
210              1.28               39.50                  -7.92          252.17
215              1.30               39.67                  -7.96          250.69
220              1.29               40.38                  -8.15          249.92
225              1.29               41.58                  -8.47          247.68
230              1.39               43.13                  -8.87          238.98
235              1.36               45.22                  -9.38          237.35
240              1.00               47.88                 -10.00          254.11
245              1.03               50.53                 -10.00          251.97
250              0.79               53.60                 -10.00          279.18
255              0.66               56.77                 -10.00          297.36
260              0.50               60.12                 -10.00          322.39
265              0.38               63.57                 -10.00          353.93
270              0.36               67.08                 -10.00          360.04
275              0.28               70.69                 -10.00          384.49
280              0.29               74.35                 -10.00          382.00
285              0.22               78.08                 -10.00          404.31
290              0.00               81.86                 -10.00          412.20
295              0.00               85.63                 -10.00          412.20
300              0.00               89.42                 -10.00          412.20
305              0.00               93.20                 -10.00          412.20
310              0.00               96.97                 -10.00          412.20
315              0.00              100.73                 -10.00          412.20
320              0.00              104.44                 -10.00          412.20
325              0.00              108.10                 -10.00          412.20
330              0.00              111.70                 -10.00          412.20
335              0.00              115.21                 -10.00          412.20
340              0.00              118.61                 -10.00          412.20
345              0.00              120.69                 -10.00          412.20
350              0.00              115.81                 -10.00          412.20
355              0.00              110.92                 -10.00          412.20




Frequency Coordination and Interference Analysis Report                05/29/2018        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.




Timothy O. Crutcher
Frequency Planner
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, VA 20147


DATED: May 29, 2018




Frequency Coordination and Interference Analysis Report   05/29/2018   Page 10 of 10



Document Created: 2018-05-29 14:23:12
Document Modified: 2018-05-29 14:23:12

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