Attachment Coordination Letters

This document pretains to SES-MOD-20181017-03678 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2018101703678_1557921

October 15, 2018

Re:     AT&T Corp -
        ROARING CRK, PA
        Call Sign: E980493
        C-Band Transmit-Receive Earth Station
        Job Number: 181015COMSGE13

**** Expedited Response Requested by October 29, 2018 ****

        ****** Revision Notice **********

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 revised coordination data on behalf of AT&T Corp - for modifications to their
existing C-Band Transmit-Receive Earth Stations in ROARING CRK, PA.

AT&T plans to add a C-band transmit/receive earth station to their existing teleport. Please update your
database with the attached information. This proposed antenna will be co-located with existing large
diameter C-band transmit/receive earth stations operating under similar parameters.

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 were not previously reported, please
contact us by October 29, 2018, as our client would like to expedite the filing of this earth station with the
FCC.

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


Sincerely,

COMSEARCH



Gary K. Edwards
Senior Manager
gedwards@comsearch.com


Enclosure(s)


                                                                                                                            Page 1 of 3
                                                          COMSEARCH
                                                      Earth Station Data Sheet
                                             19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                               (703)726-5662 http://www.comsearch.com

Date:                                    10/15/2018
Job Number:                              181015COMSGE13
Administrative Information
Status                                   ENGINEER PROPOSAL
Call Sign                                E980493
Licensee Code                            P1175P
Licensee Name                            AT&T Corp -

Site Information                         ROARING CRK, PA
Venue Name
Latitude (NAD 83)                        40° 53' 39.3" N
Longitude (NAD 83)                       76° 26' 19.8" W
Climate Zone                             A
Rain Zone                                2
Ground Elevation (AMSL)                  292.61 m / 960.0 ft

Link Information
Satellite Type                           Geostationary
Mode                                     TR - Transmit-Receive
Modulation                               Digital
Satellite Arc                            4.6° W to 148.2° West Longitude
Azimuth Range                            102.1° to 257.8°
Corresponding Elevation Angles           5.0° / 5.0°
Antenna Centerline (AGL)                 5.49 m / 18.0 ft

Antenna Information                            Receive - FCC32                        Transmit - FCC32
Manufacturer                                   Gen Dynamics                           Gen Dynamics
Model                                          Satcom                                 Satcom
Gain / Diameter                                53.5 dBi / 13.1 m                      57.3 dBi / 13.1 m
3-dB / 15-dB Beamwidth                         0.38° / 0.76°                          0.26° / 0.52°

Max Available RF Power        (dBW/4 kHz)                                             -2.7
                              (dBW/MHz)                                               21.3

Maximum EIRP                  (dBW/4 kHz)                                             54.6
                              (dBW/MHz)                                               78.6

Interference Objectives:    Long Term          -156.0 dBW/MHz        20%              -154.0 dBW/4 kHz       20%
                            Short Term         -146.0 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)               54K6G7W - 72M0G7W / 3700.0 - 4200.0    54K6G7W - 72M0G7W / 5850.0 - 6425.0


Max Great Circle Coordination Distance         743.1 km / 461.7 mi                    448.0 km / 278.3 mi
Precipitation Scatter Contour Radius           621.4 km / 386.1 mi                    101.8 km / 63.2 mi


                                                                                                                 Page 2 of 3
                                                COMSEARCH
                                            Earth Station Data Sheet
                                   19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                     (703)726-5662 http://www.comsearch.com


Coordination Values           ROARING CRK, PA
Licensee Name                     AT&T Corp -
Latitude (NAD 83)                 40° 53' 39.3" N
Longitude (NAD 83)                76° 26' 19.8" W
Ground Elevation (AMSL)           292.61 m / 960.0 ft
Antenna Centerline (AGL)          5.49 m / 18.0 ft
Antenna Model                     Gen Dynamics 13.1 meter
Antenna Mode                             Receive 4.0 GHz                      Transmit 6.1 GHz
Interference Objectives: Long Term       -156.0 dBW/MHz 20%                   -154.0 dBW/4 kHz         20%
                         Short Term      -146.0 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             102.08                -10.00         285.28               -10.00         170.66
 5             1.55              97.11                -10.00         206.75               -10.00         103.55
 10            2.47              92.12                -10.00         183.74               -10.00         100.00
 15            2.63              87.13                -10.00         180.05               -10.00         100.00
 20            2.36              82.13                -10.00         186.24               -10.00         100.00
 25            2.23              77.14                -10.00         189.36               -10.00         100.00
 30            2.00              72.15                -10.00         194.54               -10.00         100.00
 35            1.66              67.16                -10.00         203.72               -10.00         100.72
 40            1.34              62.18                -10.00         210.18               -10.00         108.89
 45            1.06              57.21                -10.00         218.49               -10.00         116.11
 50            1.13              52.22                -10.00         216.27               -10.00         114.22
 55            1.06              47.25                 -9.86         219.10                -9.86         116.45
 60            1.55              42.23                 -8.64         210.46                -8.64         107.48
 65            1.22              37.28                 -7.29         227.41                -7.29         120.07
 70            0.64              32.38                 -5.76         266.66                -5.76         146.54
 75            0.49              27.46                 -3.97         289.45                -3.97         162.55
 80            0.31              22.58                 -1.84         327.57                -1.84         190.84
 85            0.24              17.74                  0.77         357.39                 0.77         206.79
 90            0.33              12.96                  4.18         372.16                 4.18         211.80
 95            0.28               8.52                  8.74         416.67                 8.74         237.32
100            0.25               5.16                 14.18         743.11                14.18         448.01
105            0.43               5.37                 13.75         568.27                13.75         328.01
110            0.99               8.48                  8.80         354.94                 8.80         193.03
115            1.39              11.79                  5.22         306.86                 5.22         162.04
120            1.74              15.05                  2.56         272.44                 2.56         140.25
125            2.30              18.07                  0.57         240.93                 0.57         121.86
130            2.50              21.22                 -1.17         224.93                -1.17         111.54
135            2.21              24.59                 -2.77         222.90                -2.77         111.46
140            1.88              27.82                 -4.11         224.13                -4.11         113.78
145            2.05              30.47                 -5.10         214.31                -5.10         106.57
150            2.55              32.56                 -5.82         202.16                -5.82         100.00
155            2.59              34.75                 -6.52         197.87                -6.52         100.00
160            3.13              36.14                 -6.95         184.11                -6.95         100.00
165            3.71              37.08                 -7.23         169.55                -7.23         100.00
170            3.28              38.57                 -7.66         176.99                -7.66         100.00
175            3.23              39.28                 -7.85         177.26                -7.85         100.00
180            3.05              39.68                 -7.96         180.62                -7.96         100.00
185            2.87              39.63                 -7.95         184.68                -7.95         100.00


                                                                                                                 Page 3 of 3
                                                COMSEARCH
                                            Earth Station Data Sheet
                                   19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                     (703)726-5662 http://www.comsearch.com


Coordination Values           ROARING CRK, PA
Licensee Name                     AT&T Corp -
Latitude (NAD 83)                 40° 53' 39.3" N
Longitude (NAD 83)                76° 26' 19.8" W
Ground Elevation (AMSL)           292.61 m / 960.0 ft
Antenna Centerline (AGL)          5.49 m / 18.0 ft
Antenna Model                     Gen Dynamics 13.1 meter
Antenna Mode                             Receive 4.0 GHz                      Transmit 6.1 GHz
Interference Objectives: Long Term       -156.0 dBW/MHz 20%                   -154.0 dBW/4 kHz         20%
                         Short Term      -146.0 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            2.76             39.07                  -7.80         187.89                -7.80         100.00
195            2.56             38.17                  -7.54         193.60                -7.54         100.00
200            2.32             36.88                  -7.17         200.74                -7.17         100.00
205            2.04             35.23                  -6.67         206.77                -6.67         101.67
210            2.11             32.93                  -5.94         208.63                -5.94         102.42
215            1.93             30.56                  -5.13         217.33                -5.13         109.19
220            1.76             27.91                  -4.14         227.64                -4.14         116.62
225            1.65             25.01                  -2.95         238.25                -2.95         123.55
230            1.16             22.21                  -1.66         264.02                -1.66         139.31
235            0.95             19.05                   0.00         285.54                 0.00         153.40
240            1.59             15.17                   2.48         277.57                 2.48         144.03
245            2.11             11.28                   5.69         283.76                 5.69         143.95
250            2.49              7.43                  10.22         309.92                10.22         155.41
255            2.37              3.87                  17.30         554.30                17.30         315.28
260            1.52              4.12                  16.63         740.41                16.63         445.94
265            0.84              8.30                   9.02         367.56                 9.02         201.62
270            0.46             12.99                   4.16         356.15                 4.16         202.13
275            0.51             17.74                   0.78         322.71                 0.78         182.90
280            0.39             22.63                  -1.87         318.20                -1.87         183.69
285            0.64             27.50                  -3.98         278.14                -3.98         153.24
290            0.00             32.52                  -5.81         313.99                -5.81         186.90
295            0.00             37.47                  -7.34         302.76                -7.34         180.97
300            0.00             42.42                  -8.69         293.76                -8.69         175.75
305            0.00             47.38                  -9.89         285.98                -9.89         171.09
310            0.00             52.35                 -10.00         285.28               -10.00         170.66
315            0.00             57.32                 -10.00         285.28               -10.00         170.66
320            0.00             62.29                 -10.00         285.28               -10.00         170.66
325            0.00             67.27                 -10.00         285.28               -10.00         170.66
330            0.00             72.25                 -10.00         285.28               -10.00         170.66
335            0.00             77.23                 -10.00         285.28               -10.00         170.66
340            0.00             82.21                 -10.00         285.28               -10.00         170.66
345            0.00             87.19                 -10.00         285.28               -10.00         170.66
350            0.00             92.17                 -10.00         285.28               -10.00         170.66
355            0.00             97.15                 -10.00         285.28               -10.00         170.66



Document Created: 2018-10-16 17:18:35
Document Modified: 2018-10-16 17:18:35

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