Attachment Preliminary Analysis

This document pretains to SES-STA-20100204-00164 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2010020400164_799618

      19700 Janelia Farm Boulevard

               Ashburn, VA 20147     m
               (703) 726—5500
        Fax (703) 726—5000      COMSEARCH®
hitpuiwaw.comsearch.com



         January 29, 2010



         eonesaoisiactaeideieiciatcn

         *** CLIENT COPY ***
         *** PLEASE MAIL ***
         *** TO CUSTOMER ***



         Re:        Shell Communications
                    Brazos—19 (Oil Platform), Gulf of Mexico
                    C—Band, Transmit—Receive Earth Station
                    Job Number: 100129COMSICO4

         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 Shell Communications, Houston, Texas
         77252 for a proposed C—band, transmit/receive earth station to be located on an oil platform designated
         Brazos—19, in the Gulf of Mexico.

         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 Comsearch by March 1, 2010.

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


         Sincerely,

         COMSEARCH



         Jeffrey E. Cowles
         Principal Frequency Planner


         Enclosure(s)


                                                                                                                              Page 1 of 3
                                                             COMSEARCH
                                                          Earth Station Data Sheet
                                              19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                                (703)726—5660 http:/www.comsearch.com

Date:                                    01/29/2010
Job Number:                              100129COMSICO4
Administrative Information
Status                                   ENGINEER PROPOSAL
Call Sign
Licensee Code                            SHEINT
Licensee Name                            Shell Communications
Site Information                         BRAZOS—19 (Oil Platform), GULF of MEXICO
Venue Name
Latitude (NAD 83)                        28° 10‘ 30.0" N
Longitude (NAD 83)                       95° 35‘ 7.2" W
Climate Zone                             B
Rain Zone                                2
Ground Elevation (AMSL)                  0.0 m / 0.0 ft

Link Information
Satellite Type                           Geostationary
Mode                                     TR — Transmit—Receive
Modulation                               Digital
Satellite Arc                            60° W to 143° West Longitude
Azimuth Range                            123.4° to 246.5°
Corresponding Elevation Angles            39.1°/29.0°
Antenna Centerline (AGL)                 30.48 m / 100.0 ft
Antenna Information                             Receive                                 Transmit
Manufacturer                                    Andrew Corporation                      Andrew Corporation
Model                                           Type 243                                Type 243
Gain / Diameter                                 38.0 dBi / 2.4 m                        42.0 dBi / 2.4 m
3—dB / 15—dB Beamwidth                          2.16° / 4.00°                           1.36° / 2.54°

                                                                                      1M81G7W   to    4M80G7W

Max Available RF Power        (dBW/ kHz)                                                20.6            —20.6
                              (dBW/MHz)                                                  3.4              3.4

Maximum EIRP                  (dBW/HA4 kHz)                                              214             214
                              (dBW/MHz)                                                  45.4            45.A
                              (dBWw)                                                     48.0            51.7
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)                1MB1G7W — 4M3OGZW / 3700.0 — 4200.0     1MB1G7W — 4M3OGTW / 5925.0 — 6425.0


Max Great Circle Coordination Distance          484.7 km / 301.1 mi                     141.5 km / 87.9 mi
Precipitation Scatter Contour Radius            490.2 km / 304.6 mi                     100.0 km / 62.1 mi


                                                                                                                         Page 2 of 3
                                                       COMSEARCH
                                                    Earth Station Data Sheet
                                          19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                              (703)726—5660 http://www.comsearch.com



Coordination Values               BRAZOS—19 (Oil Platform), GM
Licensee Name                     Shell Communications
Latitude (NAD 83)                 28° 10‘ 30.0" N
Longitude (NAD 83)                95° 35 7.2" W
Ground Elevation (AMSL)           0.0 m / 0.0 ft
Antenna Centerline (AGL)          30.48 m / 100.0 ft
Antenna Model                     Andrew Corporation Type 243
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                                                              —20.6 (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                 110.37                 ~10.00        412.20                ~10.00         128.44
 5               0.00                 111.69                 +10.00        412.20                ~10.00         123.44
10               0.00                 107.98                 ~10.00        412.20                —10.00         123.44
15               0.00                 104.21                 ~10.00        412.20                ~10.00         123.44
20               0.00                 100.38                 ~10.00        412.20                +10.00         123.44
25               0.00                 96.53                  ~10.00        412.20                +10.00         123.44
30               0.00                 92.66                  ©10.00        412.20                —10.00         128.44
35               0.00                 88.77                  ~10.00        412.20                —10.00         123.44
40               0.00                 84.90                  ~10.00        412.20                —10.00         128.44
45               0.00                 81.03                  ~10.00        412.20                ~10.00         123.44
50               0.00                 77.20                  +10.00        412.20                ~10.00         123.44
550   _          0.00                 73.41                  +10.00        412.20                —10.00         123.44
60               0.00                 69.67                  +10.00        412.20                ~10.00         123.44
65               0.00                 66.01                  ~10.00        412.20                ~10.00         123.44
70               0.00                 62.43                  ~10.00        412.20                —10.00         123.44
75              0.00                  58.98                  ~10.00        412.20                —10.00         123.44
80              0.00                  55.67                  ~10.00        412.20                —10.00         123.44
85              0.00                  52.53                  ~10.00        412.20                ~10.00         123.44
90              0.00                  49.60                  ~10.00        412.20                ~10.00         123.44
95              0.00                  46.93                   —9.79        414.87                 —9.79         124.07
100             0.00                  44.56                  —9.22         421.96                ~9.22          125.77
105             0.00                  42.54                  —8.72         428.39                ~8.72          127.31
110             0.00                  40.95                  —8.31         493.79                —8.31          128.63
115             0.00                  39.81                  —8.00         497.80                —8.00          129.61
120             0.00                  39.18                  —7.83         440.09                —7.83          130.17
125             0.00                  39.08                  —7.80         440.46                —7.80          130.26
130             0.00                  39.52                  —7.92         438.86                —7.92          129.87
135             0.00                  40.47                  —8.18         485.45                —8.18          129.03
140             0.00                  41.90                   —8.56        430.52                 —8.56         127.83
145             0.00                  43.77                   +9.03        424.42                 —9.03         126.36
150             0.00                  46.01                   —9.57        417.54                 —9.57         124.71
155             0.00                  48.58                  ~10.00        412.20                —10.00         123.44
160             0.00                  51.35                  ~10.00        412.20                ~10.00         123.44
165             0.00                  53.74                  ~10.00        412.20                ~10.00         123.44
170             0.00                  55.57                  ~10.00        412.20                —10.00         123.44
175             0.00                  56.72                  —10.00        412.20                +10.00         123.44
180             0.00                  57.12                  ~10.00        412.20                —10.00         123.44
185             0.00                  56.72                  ©10.00        412.20                ~10.00         123.44


                                                                                                                   Page 3 of 3
                                                   COMSEARCH
                                              Earth Station Data Sheet
                                     19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                       (703)726—5660 http://www.comsearch.com




Coordination Values             BRAZOS—19 (Oil Platform), GM
Licensee Name                   Shell Communications
Latitude (NAD 83)               28° 10‘ 30.0" N
Longitude (NAD 83)              95° 35‘7.2" W
Ground Elevation (AMSL)           0.0 m / 0.0 ft
Antenna Centerline (AGL)          30.48 m / 100.0 ft
Antenna Model                    Andrew Corporation Type 243
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 dBwW/MHz      0.01%               —131.0 dBW/4 kHz         0.0025%
Max Available RF Power                                                          20.6 (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              0.00             55.57                  ~10.00        412.20               —19.00         123.44
195              0.00             53.74                  ~10.00        412.20               ~10.00         123.44
200              0.00             51.35                  ~10.00        412.20               ~10.00         123.44
205              0.00             48.49                  ~10.00        412.20               ~10.00         123.44
210              0.00             45.28                   —9.40        419.75                —9.40         125.24
215              0.00             41.82                   —8.53        430.81                —8.53         127.90
220              0.00             38.53                   —7.64        442.52                7.54          130.76
225              0.00             35.57                   —6.78        454.23                —6.78         133.67
230              0.00             33.04                   —5.98        464.70                —5.98         136.45
235              0.00             31.04                   —5.30        474.29                —5.30         138.88
240              0.00             29.69                   ~4.81        481.30                ~4.81         140.66
245              0.00             29.06                   ~4.58        484.68                —4.58         141.53
250              0.00             29.21                   ~4.64        483.86                —4.64         141.32
255              0.00             30.13                   ~4.97        478.98                ~4.97         140.07
260              0.00             31.74                   —5.54        470.85                5.54          138.01
265              0.00             33.96                   —6.27        461.18                —6.27         135.41
270              0.00             36.66                   ~711         449.76                711           182.55
275              0.00             39.76                   —7.99        437.99                —7.99         129.65
280              0.00             43.15                   —8.88        426.39                +8.88         126.83
285              0.00             46.79                   —9.75        415.27                —9.75         124.17
290              0.00             50.60                  ~10.00        412.20               —10.00         123.44
295              0.00             54.56                  ~10.00        412.20               —10.00         123.44
300              0.00             58.63                  ~10.00        412.20               ~10.00         123.44
305              0.00             62.78                  ~10.00        412.20               ~10.00         123.44
310              0.00             67.00                  —10.00        412.20               ~10.00         123.44
315              0.00             71.27                  +10.00        412.20               —10.00         123.44
320              0.00             75.59                  —10.00        412.20               ~10.00         123.44
325              0.00              79.93                 ~10.00       412.20                ~10.00         123.44
330              0.00              84.28                 ~10.00       412.20                —10.00         123.44
335              0.00              88.65                 +10.00       412.20                +10.00         123.44
340              0.00             93.03                  ~10.00       412.20                —10.00         123.44
345              0.00             97.39                  —10.00       412.20                +10.00         123.44
350              0.00             101.74                 ~10.00       412.20                ~10.00         123.44
355              0.00             106.08                 ~10.00       412.20                ~10.00         123.44



Document Created: 2010-02-01 13:03:37
Document Modified: 2010-02-01 13:03:37

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