Attachment Exhibit A

This document pretains to SES-LIC-20110909-01061 for License on a Satellite Earth Station filing.

IBFS_SESLIC2011090901061_915678

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                         Prepared for

           Global Crossing Americas Solutions, Inc
                    Arecibo, Puerto Rico

                    Satellite Earth Station




                        Prepared By:
                       COMSEARCH
                19700 Janelia Farm Boulevard
                   Ashburn, Virginia 20147
                     September 5, 2011


                                                     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                                             09/05/2011                       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, based
upon the restrictions noted in the Summary of Results (Section 2).




Frequency Coordination and Interference Analysis Report   09/05/2011         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 most cases.

The following companies reported potential great circle interference conflicts that did not
meet the objectives on a line-of-sight basis. When over-the-horizon losses and frequency
separation are considered on the interfering paths, sufficient losses exist to negate
harmful interference from occurring with the proposed transmit-receive earth station.
Further, the transmit spectrum will be limited to frequencies 6094.0 to 6124.0 MHz and
6382.0 to 6423.0 MHz.


       Company

       AT&T Mobility Puerto Rico
       Neptuno Media



No other carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report    09/05/2011         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.

Expedited coordination data for this earth station was sent to the below listed carriers with a letter dated July
22, 2011.


        Company

        ALL AMERICAN CABLE AND RADIO INC
        AT&T Mobility Puerto Rico
        Aeronet Wireless Broadband Corp.
        CCPR of the Virgin Islands, Inc.
        CROWN CASTLE INT CORP DE PUERTO RICO
        EVERTEC, INC
        INTERISLAND TELEPHONE CORPORATION
        Iniciativa Tecnologica Centro Oriental
        Interference Office, Arecibo Observatory
        Neptuno Media
        PRWireless, Inc.
        PUERTO RICO ELECTRIC POWER AUTHORITY
        PUERTO RICO HIGHWAY AUTHORITY
        Puerto Rico Commonwealth of State Police
        Puerto Rico Telephone Company
        Sprintcom, Inc. Puerto Rico
        T-Mobile Puerto Rico LLC




Frequency Coordination and Interference Analysis Report                 09/05/2011              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            09/05/2011            Page 6 of 10


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

Date:                                    09/05/2011
Job Number:                              110722COMSJC01
Administrative Information
Status                                   ENGINEER PROPOSAL
Call Sign
Licensee Code                            GLOAME
Licensee Name                            Global Crossing Americas Solutions, Inc
Site Information                         ARECIBO, PUERTO RICO
Venue Name                               MIRAMAR ARECIBO
Latitude (NAD 83)                        18° 28' 37.8" N
Longitude (NAD 83)                       66° 45' 16.3" W
Climate Zone                             B
Rain Zone                                1
Ground Elevation (AMSL)                  16.15 m / 53.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     TR - Transmit-Receive
Modulation                               Digital
Satellite Arc                            45° W to 56° West Longitude
Azimuth Range                            128.5° to 149.1°
Corresponding Elevation Angles           57.0° / 65.1°
Antenna Centerline (AGL)                 6.4 m / 21.0 ft
Antenna Information                            Receive                                Transmit
Manufacturer                                   Prodelin                               Prodelin
Model                                          2.4 Meter                              2.4 Meter
Gain / Diameter                                38.0 dBi / 2.4 m                       42.0 dBi / 2.4 m
3-dB / 15-dB Beamwidth                         2.30° / 4.60°                          1.50° / 3.00°

Max Available RF Power        (dBW/4 kHz)                                             -17.3
                              (dBW/MHz)                                                 6.7

Maximum EIRP                  (dBW/4 kHz)                                             24.7
                              (dBW/MHz)                                               48.7


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)               230KG7D - 2M23G7D / 3700.0 - 4200.0        230KG7D - 1M30G7D / 6094.0 - 6124.0
                                                                                          230KG7D - 1M30G7D / 6382.0 - 6423.0


Max Great Circle Coordination Distance         412.2 km / 256.1 mi                    133.9 km / 83.2 mi
Precipitation Scatter Contour Radius           100.0 km / 62.1 mi                     100.0 km / 62.1 mi




Frequency Coordination and Interference Analysis Report                      09/05/2011               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              ARECIBO, PR
Licensee Name                     Global Crossing Americas Solutions, Inc
Latitude (NAD 83)                 18° 28' 37.8" N
Longitude (NAD 83)                66° 45' 16.3" W
Ground Elevation (AMSL)           16.15 m / 53.0 ft
Antenna Centerline (AGL)          6.4 m / 21.0 ft
Antenna Model                     Prodelin 2.4 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                                                            -17.3 (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              109.78                 -10.00          412.20                -10.00         133.93
 5               0.00              107.46                 -10.00          412.20                -10.00         133.93
10               0.00              105.03                 -10.00          412.20                -10.00         133.93
15               0.00              102.51                 -10.00          412.20                -10.00         133.93
20               0.00              99.92                  -10.00          412.20                -10.00         133.93
25               0.00              97.28                  -10.00          412.20                -10.00         133.93
30               0.00              94.59                  -10.00          412.20                -10.00         133.93
35               0.00              91.88                  -10.00          412.20                -10.00         133.93
40               0.00              89.16                  -10.00          412.20                -10.00         133.93
45               0.00              86.45                  -10.00          412.20                -10.00         133.93
50               0.00              83.75                  -10.00          412.20                -10.00         133.93
55               0.00              81.09                  -10.00          412.20                -10.00         133.93
60               0.00              78.47                  -10.00          412.20                -10.00         133.93
65               0.00              75.93                  -10.00          412.20                -10.00         133.93
70               0.00              73.46                  -10.00          412.20                -10.00         133.93
75               0.00              71.10                  -10.00          412.20                -10.00         133.93
80               0.00              68.85                  -10.00          412.20                -10.00         133.93
85               0.00              66.73                  -10.00          412.20                -10.00         133.93
90               0.00              64.78                  -10.00          412.20                -10.00         133.93
 95              0.00              63.00                  -10.00          412.20                -10.00         133.93
100              0.00              61.42                  -10.00          412.20                -10.00         133.93
105              0.00              60.05                  -10.00          412.20                -10.00         133.93
110              0.94              58.05                  -10.00          261.22                -10.00         100.00
115              0.94              57.14                  -10.00          261.30                -10.00         100.00
120              1.47              55.98                  -10.00          226.63                -10.00         100.00
125              1.89              55.21                  -10.00          204.94                -10.00         100.00
130              1.98              55.07                  -10.00          200.48                -10.00         100.00
135              2.20              55.09                  -10.00          191.83                -10.00         100.00
140              2.53              55.33                  -10.00          180.15                -10.00         100.00
145              3.07              55.67                  -10.00          162.62                -10.00         100.00
150              3.88              56.09                  -10.00          143.00                -10.00         100.00
155              3.52              57.86                  -10.00          151.23                -10.00         100.00
160              3.56              59.52                  -10.00          150.24                -10.00         100.00
165              3.56              61.43                  -10.00          150.26                -10.00         100.00
170              3.59              63.37                  -10.00          149.84                -10.00         100.00
175              3.19              64.91                  -10.00          159.39                -10.00         100.00
180              2.81              66.46                  -10.00          170.74                -10.00         100.00
185              2.81              67.85                  -10.00          170.74                -10.00         100.00



Frequency Coordination and Interference Analysis Report                09/05/2011             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              ARECIBO, PR
Licensee Name                     Global Crossing Americas Solutions, Inc
Latitude (NAD 83)                 18° 28' 37.8" N
Longitude (NAD 83)                66° 45' 16.3" W
Ground Elevation (AMSL)           16.15 m / 53.0 ft
Antenna Centerline (AGL)          6.4 m / 21.0 ft
Antenna Model                     Prodelin 2.4 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                                                            -17.3 (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              2.81              69.41                  -10.00          170.74                -10.00         100.00
195              2.75              71.15                  -10.00          172.75                -10.00         100.00
200              2.73              72.99                  -10.00          173.41                -10.00         100.00
205              2.73              74.92                  -10.00          173.42                -10.00         100.00
210              2.73              76.96                  -10.00          173.43                -10.00         100.00
215              2.12              79.31                  -10.00          195.02                -10.00         100.00
220              2.38              81.38                  -10.00          185.52                -10.00         100.00
225              2.85              83.49                  -10.00          169.43                -10.00         100.00
230              2.81              85.79                  -10.00          170.49                -10.00         100.00
235              2.71              88.11                  -10.00          173.95                -10.00         100.00
240              2.55              90.43                  -10.00          179.45                -10.00         100.00
245              3.15              92.79                  -10.00          160.63                -10.00         100.00
250              2.88              95.08                  -10.00          168.38                -10.00         100.00
255              2.23              97.20                  -10.00          190.75                -10.00         100.00
260              1.44              99.13                  -10.00          228.56                -10.00         100.00
265              1.06              101.05                 -10.00          250.22                -10.00         100.00
270              0.95              102.97                 -10.00          259.89                -10.00         100.00
275              0.95              104.85                 -10.00          259.86                -10.00         100.00
280              0.70              106.47                 -10.00          290.94                -10.00         100.00
285              0.49              107.97                 -10.00          323.24                -10.00         109.23
290              0.00              109.11                 -10.00          412.20                -10.00         133.93
295              0.00              110.44                 -10.00          412.20                -10.00         133.93
300              0.28              111.86                 -10.00          385.68                -10.00         125.83
305              0.20              112.83                 -10.00          410.58                -10.00         133.43
310              0.00              113.49                 -10.00          412.20                -10.00         133.93
315              0.00              114.14                 -10.00          412.20                -10.00         133.93
320              0.00              114.61                 -10.00          412.20                -10.00         133.93
325              0.00              114.87                 -10.00          412.20                -10.00         133.93
330              0.00              114.94                 -10.00          412.20                -10.00         133.93
335              0.00              114.80                 -10.00          412.20                -10.00         133.93
340              0.00              114.46                 -10.00          412.20                -10.00         133.93
345              0.00              113.92                 -10.00          412.20                -10.00         133.93
350              0.00              113.19                 -10.00          412.20                -10.00         133.93
355              0.00              111.98                 -10.00          412.20                -10.00         133.93




Frequency Coordination and Interference Analysis Report                09/05/2011             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.




Jeffrey E. Cowles
Engineer III, Telecommunications
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, Va. 20147


DATED: September 5, 2011




Frequency Coordination and Interference Analysis Report   09/05/2011   Page 10 of 10



Document Created: 2011-09-07 15:36:05
Document Modified: 2011-09-07 15:36:05

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