Attachment Attachment A

This document pretains to SES-STA-20120822-00779 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2012082200779_964233

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                           Prepared for

       SCIENCE APPLICATIONS INTERNATIONAL CORPORATION
                          GUAM, GU

                      Satellite Earth Station




                           Prepared By:
                          COMSEARCH
                   19700 Janelia Farm Boulevard
                     Ashburn, Virginia 20147
                        August 22, 2012


                                                 TABLE OF CONTENTS
1.   CONCLUSIONS ..................l.lle
2.   SUMMARY OF RESULTS....
3.   SUPPLEMENTAL SHOWING .....
4.   EARTH STATION COORDINATION DATA ..
5.   CERTIFICATION ........ econnesrrervernrenererrererrerneenenrnecee en




Frequency Coordination and Interference Analysis Report                     08/22/2012   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   08/22/2012         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 line—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 transmit—receive earth station.



       Company

       None




No carriers reported potential interference cases.




Frequency Coordination and Interference Analysis Report   08/22/2012          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 August 20,
2012.

        Company

        Comsearch
        Federal Communications Commission




Frequency Coordination and Interference Analysis Report               08/22/2012             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            08/22/2012             Page 6 of 10


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

Date:                                     08/22/2012
Job Number:                               120820COMSICO2
Administrative Information
Status                                    TEMPORARY (Operation from 09/08/2012 to 09/25/2012)
Call Sign                                 TEMPOY
Licensee Code                             ZSCAPI
Licensee Name                             SCIENCE APPLICATIONS INTERNATIONAL CORPORATION
Site Information                          GUAM, GU
Venue Name                                NAVAL STATION
Latitude (NAD 83)                         13° 255 57.0" N
Longitude (NAD 83)                        144° 39‘ 36.0" E
Climate Zone                              B
Rain Zone                                 4
Ground Elevation (AMSL)                   2.44 m / 8.0 ft

Link Information
Satellite Type                            Geostationary
Mode                                      TR — Transmit—Receive
Modulation                                Digital
Satellite Arc                             194° W to 194° West Longitude
Azimuth Range                             120.7° to 120.7°
Corresponding Elevation Angles             60.7° / 60.7°
Antenna Centerline (AGL)                  3.05 m / 10.0 ft

Antenna Information                             Receive — FCC32                        Transmit — FCC32
Manufacturer                                    Vertex/RSI                             Vertex/RSI
Model                                           1.8 Meter                              1.8 Meter
Gain / Diameter                                 35.7 dBi/ 1.8 m                        38.5 dBi / 1.8 m
3—dB / 15—dB Beamwidth                          2.78° / 5.85°                          2.00° / 4.24°

Max Available RF Power         (dBW/4 kHz)                                             10.9
                               (dBW/MHz)                                                131

Maximum EIRP                   (dBW/4 kHz)                                             216
                               (dBW/MHz)                                               51.6


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)                3M40G7ZW / 3700.0 — 4200.0             3M40GTW / 5925.0 — 6425.0


Max Great Circle Coordination Distance          412.2 km / 256.1 mi                    158.8 km / 98.7 mi
Precipitation Scatter Contour Radius            100.0 km / 62.1 mi                     100.0 km / 62.1 mi




Frequency Coordination and Interference Analysis Report                       08/22/2012               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             GUAM, GU
Licensee Name                   SCIENCE APPLICATIONS INTERNATIONAL CORPORATION
Latitude (NAD 83)               13° 255 57.0" N
Longitude (NAD 83)              144° 39‘ 36.0" E
Ground Elevation (AMSL)           2.44 m / 8.0 ft
Antenna Centerline (AGL)          3.05 m / 10.0 ft
Antenna Model                     Vertex/RSI 1.8 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                                                         —10.9 (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             104.48                  ~10.00          412.20             ~10.00         158.84
 5               0.00             102.26                  —10.00          412.20             ~10.00         158.84
10               0.00             99.97                   ~10.00          412.20             ~10.00         158.84
15               0.00             97.62                   ~10.00          412.20             ~10.00         158.84
20               0.00             95.23                   ~10.00          412.20             —10.00         158.84
25               0.00             92.80                   ~10.00          412.20             ~10.00         158.84
30               0.00             90.36                   ~10.00          412.20             ~10.00         158.84
35               0.00             87.91                   ~10.00          412.20             —10.00         158.84
40               0.00             85.48                   ~10.00          412.20             ~10.00         158.84
45               0.00             83.07                   ~10.00          412.20             —10.00         158.84
50               0.48             80.57                   ~10.00          328.25             ~10.00         126.24
55               1.05              78.02                  ~10.00          251.05             —10.00         100.10
60               1.20              75.64                  ~10.00          242.22             —10.00         100.00
65               1.43              73.28                  ~10.00          228.83             ~10.00         100.00
70               1.78              70.93                  ~10.00          210.41             —10.00         100.00
75               1.99             68.75                   ~10.00          200.15             ~10.00         100.00
80               2.66             66.35                   ~10.00          175.58             ~10.00         100.00
85               3.24             6441                    ~10.00          158.17             ~10.00         100.00
90               2.97              62.69                  ~10.00          165.66             ~10.00          100.00
95               3.13              61.12                  ~10.00          161.14             ~10.00          100.00
100              3.26              59.78                  ~10.00          157.67             ~10.00          100.00
105              3.42              58.66                  ~10.00          153.75             ~10.00          100.00
110              2.34              58.99                  ~10.00          187.00             ~10.00          100.00
115              1.93              58.95                  +10.00          202.97             ~10.00          100.00
120              1.59              59.11                  ~10.00          22014              ~10.00          100.00
125              1.50              59.30                  ~10.00          225.47             —10.00          100.00
130              219               58.98                  ~10.00          192.50             —10.00          100.00
135              211               59.67                  ~10.00          195.49             —10.00          100.00
140              1.98              60.66                  ~10.00          200.60             —10.00          100.00
145              142               62.25                  «1000           229.58             —10.00          100.00
150              112               63.80                  ~10.00          246.87             —10.00          100.00
155              111               65.28                  ~10.00          247 48             —10.00          100.00
160              1.36              66.75                  ~10.00          232.94             ~10.00          100.00
165              1.95              68.19                  ~10.00          201.79             —10.00          100.00
170              2.05              70.16                  ~10.00          197.67             ~10.00          100.00
175              1.31              72.71                  ~10.00          235.83             ~10.00          100.00
180              0.47              75.30                  ~10.00          329.63             ~10.00          126.74



Frequency Coordination and Interference Analysis Report                08/22/2012          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              GUAM, GU
Licensee Name                    SCIENCE APPLICATIONS INTERNATIONAL CORPORATION
Latitude (NAD 83)                13° 255 57.0" N
Longitude (NAD 83)               144° 39‘ 36.0" E
Ground Elevation (AMSL)          2.44 m | 8.0 ft
Antenna Centerline (AGL)         3.05 m / 10.0 ft
Antenna Model                    Vertex/RSI 1.8 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                                                              —10.9 (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)
185              0.50                77.54                 ~10.00          $22.79                ~10.00         124.28
190              0.48                79.88                 ~10.00          327.98                ~10.00         126.14
195              0.44                82.27                 ~10.00          337.81                ~10.00         129.73
200              0.34                84.72                 ~10.00          365.21                ~10.00         140.66
205              0.00                87.20                 ~10.00          412.20                ~10.00         158.84
210              0.00                89.64                 ~10.00          412.20                —10.00         158.84
215              0.00                92.09                 ~10.00          412.20                ~10.00         158.84
220              0.00                94.52                 ~10.00          412.20                ~10.00         158.84
225              0.21                96.97                 ~10.00          408.46                ~10.00         157.36
230              0.38                 99.40                ~10.00          353.39                ~10.00         136.15
235              0.53                101.80                ~10.00          317.14                ~10.00         122.29
240              0.79                104.19                ~10.00          279.64                ~10.00         111.46
245              0.80                106.40                ~10.00          278.18                ~10.00         110.94
250              0.76                108.48                ~10.00          282.58                ~10.00         112.49
255              0.74                110.45                +10.00          286.14                ~10.00         113.71
260              0.82                112.35                ~10.00          274.16                ~10.00         109.72
265              0.90                114.09                ~10.00          265.06                +10.00         106.15
270              1.02                115.72                ~10.00          252.52                ~10.00         100.69
275              1.08                117.10                 ~10.00         248.90                —10.00         100.00
280              1.10                118.24                 ~10.00         247.78                —10.00          100.00
285              115                 119.19                 —10.00         244.79                —10.00          100.00
290              118                 119.88                 ~10.00         24343                 —10.00          100.00
295              1.08                120.20                 ~10.00         249.24                ~10.00          100.00
300              0.80                120.09                 ~10.00         277 .41               —10.00          110.67
305              0.82                120.02                 ~10.00         275.62                ~10.00          110.03
310              0.79                119.65                 ~10.00         278.70                —10.00          111.13
315              0.00                118.31                 ~10.00         412.20                ~10.00          158.84
320              0.00                117.51                 ~10.00         412.20                ~10.00          158.84
325              0.00                116.49                 »10.00         412.20                ~10.00          158.84
330              0.00                115.27                 ~10.00         412.20                ~10.00          158.84
335              0.00                113.85                 ~10.00         412.20                ~10.00          158.84
340              0.00                112.26                 ~10.00         412.20                ~10.00          158.84
345              0.00                110.51                 ~10.00         412.20                ~10.00          158.84
350              0.00                108.62                 ~10.00         412.20                —10.00          158.84
355              0.00                106.60                 —10.00         412.20                —10.00          158.84




Frequency Coordination and Interference Analysis Report                 08/22/2012             Page 9 of 10


5. CERTIFICATION




1 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 I$ COMPLETE AND CORRECT TO THE BEST OF MY
KNOWLEDGE AND BELIEF.




0%% E. Couler‘
Jeffrey E. Cowles
Engineer III, Telecommunications
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, Va. 20147



DATED: August 22, 2012




Frequency Coordination and Interference Analysis Report   08/22/2012   Page 10 of 10


                         EXHIBIT B




RADIATION HAZARD STUDY


                                                                                          Exhibit B
Radiation Hazard Report                                                                   Page 1 of 5


      Analysis of Non—lonizing Radiation for a 1.8—Meter Earth
                          Station System
This report analyzes the non—ionizing radiation levels for a 1.8—meter earth station system. The analysis and
calculations performed in this report comply with the methods described in the FCC Office of Engineering
and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97—01. The radiation
safety limits used in the analysis are in conformance with the FCC R&O 96—326. Bulletin No. 65 and the
FCC R&O specifies that there are two separate tiers of exposure limits that are dependant on the situation in
which the exposure takes place and/or the status of the individuals who are subject to the exposure. The
Maximum Permissible Exposure (MPE) limits for persons in a General Population/Uncontrolled environment
are shown in Table 1. The General Population/Uncontrolled MPE is a function of transmit frequency and is
for an exposure period of thirty minutes or less. The MPE limits for persons in an Occupational/Controlled
environment are shown in Table 2. The Occupational MPE is a function of transmit frequency and is for an
exposure period of six minutes or less. The purpose of the analysis described in this report is to determine
the power flux density levels of the earth station in the far—fleld, near—field, transition region, between the
subreflector or feed and main reflector surface, at the main reflector surface, and between the antenna edge
and the ground and to compare these levels to the specified MPEs.


                 Table 1. Limits for General Population/Uncontrolled Exposure (MPE)
                    Frequency Range (MHz)            Power Density (mW/icm*)
                              30—300                               0.2
                             300—1500                   Frequency (MHz)*(0.8/1200)
                           1500—100,000                            1.0

                     Table 2. Limits for Occupational/Controlled Exposure (MPE)
                    Frequency Range (MHz)            __Power Density (mW/icm")
                               30—300                                 1.0
                              300—1500                  Frequency (MHz)*(4.0/1200)
                           1500—100,000                               5.0


           Table 3. Formulas and Parameters Used for Determining Power Flux Densities
     Parameter                       Symbol              Formula                 Value                Units
     Antenna Diameter                  D                   Input                  1.8                 m
     Antenna Surface Area             Asurface            1D*/ 4                  2.54                m*
     Feed Flange Diameter               Drs                Input                   7.6                cm
     Area of Feed Flange                Afa              x D; *4                  45.36               cm*
     Frequency                           F                 Input                  6175                MHz
     Wavelength                          A                300 / F               0.048583              m
     Transmit Power                      P                 Input                  69.00               W
     Antenna Gain (dBi)                 Ges                Input                   38.5               dBi
     Antenna Gain (factor)               6                10%="°                 7079.5               n/a
     Pi                                  o               Constant              3.1415927              n/a
     Antenna Efficiency                  m              GMGD)                      0.52               n/a


                                                                                 Exhibit B
Radiation Hazard Report                                                          Page 2 of 5


1.      Far Field Distance Calculation

The distance to the beginning of the far field can be determined from the following equation:

     Distance to the Far Field Region                       Ry =0.60 D/A                        (1)
                                                                = 40.0 m

The maximum main beam power density in the far field can be determined from the following
equation:

     On—Axis Power Density in the Far Field                 S; =GP/(41R;,2)                     (2)
                                                                = 24.278 Wim*
                                                                = 2.428 mWicm*

2.      Near Field Calculation

Power flux density is considered to be at a maximum value throughout the entire length of the
defined Near Field region. The region is contained within a cylindrical volume having the same
diameter as the antenna. Past the boundary of the Near Field region, the power density from the
antenna decreases linearly with respect to increasing distance.

The distance to the end of the Near Field can be determined from the following equation:

     Extent of the Near Field                               Ry = D"/ (4 2)                      (3)
                                                               = 16.7 m

The maximum power density in the Near Field can be determined from the following equation:

     Near Field Power Density                               Sy = 1601 P/ (xD")                  (4)
                                                               = 56.676 W/im*
                                                               = 5.668 mW/cm*

3.      Transition Region Calculation

The Transition region is located between the Near and Far Field regions. The power density
begins to decrease linearly with increasing distance in the Transition region. While the power
density decreases inversely with distance in the Transition region, the power density decreases
inversely with the square of the distance in the Far Field region. The maximum power density in
the Transition region will not exceed that calculated for the Near Field region. The power density
calculated in Section 1 is the highest power density the antenna can produce in any of the regions
away from the antenna. The power density at a distance R, can be determined from the following
equation:

     Transition Region Power Density                        S =SirRy/R                          (5)
                                                                = 5.668 mW/cm*


                                                                                Exhibit B
Radiation Hazard Report                                                         Page 3 of 5


4.      Region between the Feed Assembly and the Antenna Reflector

Transmissions from the feed assembly are directed toward the antenna reflector surface, and are
confined within a conical shape defined by the type of feed assembly. The most common feed
assemblies are waveguide flanges, horns or subreflectors. The energy between the feed assembly
and reflector surface can be calculated by determining the power density at the feed assembly
surface. This can be determined from the following equation:

     Power Density at the Feed Flange                     S;, = 4000 P / Ar                   (6)
                                                              = 6084.039 mW/cm*

5.      Main Reflector Region

The power density in the main reflector is determined in the same manner as the power density at
the feed assembly. The area is now the area of the reflector aperture and can be determined from
the following equation:

     Power Density at the Reflector Surface           Ssurface = 4 / Asurtace                 (7)
                                                              = 108.461 W/m*
                                                              = 10.846 mW/cm"


6.      Region between the Reflector and the Ground

Assuming uniform illumination of the reflector surface, the power density between the antenna and
the ground can be determined from the following equation:

     Power Density between Reflector and Ground           Sy =P / Asurface                    (8)
                                                              = 27.115 W/im*
                                                              =2.712 mWicm*


                                                                             Exhibit B
Radiation Hazard Report                                                      Page 4 of 5


7.       Summary of Calculations


           Table 4. Summary of Expected Radiation levels for Uncontrolled Environment

                                             Calculated Maximum
                                        Radiation Power Density Level
Region                                                (mWicm")             Hazard Assessment
1.   Far Field (R; = 40.0 m)                    S¢            2.428          Potential   Hazard
2.   Near Field (Ry=16.7 m)                     Sre           5.668          Potential   Hazard
3.   Transition Region (Ry <R, < Ry)            S,            5.668          Potential   Hazard
4.    Between Feed Assembly and                 Sia        6084.039          Potential   Hazard
      Antenna Reflector
5. Main Reflector                               Scurface     __10.846        Potential Hazard
6. Between Reflector and Ground                 S,            2.712          Potential Hazard



            Table 5. Summary of Expected Radiation levels for Controlled Environment

                                             Calculated Maximum
                                           Radiation Power Density
Region                                          Level (mW/icm")           Hazard Assessment
1. Far Field (R;= 40.0 m)                        S¢        2.428           Satisfies FCC MPE
2. Near Field (R;= 16.7 m)                       Srg       5.668             Potential Hazard
3. Transition Region (Ry < R< Rg)               S,         5.668            Potential Hazard
4. Between Feed Assembly and                    Sta    6084.039             Potential Hazard
    Antenna Reflector
5. Main Reflector                               Scurtace     10.846          Potential Hazard
6. Between Reflector and Ground                 S;            2.712        Satisfies FCC MPE




It is the applicant‘s responsibility to ensure that the public and operational personnel are not
exposed to harmful levels of radiation.


                                                                                      Exhibit B
Radiation Hazard Report                                                               Page 5 of 5


8.     Conclusions

Based upon the above analysis, it is concluded that harmful levels of radiation may exist in those
regions noted for the Uncontrolled (Table 4) and Controlled (Table 5) environments.

The area around the antenna, equal to one diameter removed from the main beam will be roped
off, and public access will be denied. This restricted area will be at least 12 feet around the
antenna, and radiation hazard signs will be posted during the operation of this earth station.

The applicant will ensure that the main beam of the antenna will be pointed at least one diameter
away from any buildings, or other obstacles in those areas that exceed the MPE levels. Since one
diameter removed from the center of the main beam the levels are down at least 20 dB, or by a
factor of 100, public safety will be ensured.

The earth station will marked with the standard radiation hazard warnings, as well as the area in
the vicinity of the earth station, to inform those in the general population, who may be working, or
otherwise present on the roof, deck, and in or near, the main beam of the antenna.

Finally, occupational exposure will be limited, and the transmitter will be turned off during periods
of maintenance, so that the MPE standard of 5.0 mw/icm**2 will be complied with for those regions
in close proximity to the main reflector, and subreflector, which could be occupied by operating
personnel.

The applicant agrees to abide by the conditions specified in Condition 5208 provided below:

       Condition 5208 — The licensee shall take all necessary measures to ensure that the
       antenna does not create potential exposure ofhumans to radiofrequency radiation
       in excess ofthe FCC exposure limits defined in 47 CFR 1.1307(b) and 1.1310
       wherever such exposures might occur. Measures must be taken to ensure
       compliance with limitsfor both occupational/controlled exposure andfor general
       population/uncontrolled exposure, as defined in these rule sections. Compliance
       can be accomplished in most cases by appropriate restrictions such asfencing.
       Requirementsfor restrictions can be determined by predictions based on
       calcuilations, modeling or byfield measurements. The FCC‘s OETBulletin 65
       (available on—line at www.fee.gov/oet/rfsafety) provides information on predicting
       exposure levels and on methods for ensuring compliance, including the use of
       warning and alerting signs and protective equipmentfor worker.




                                                                                                        f
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Document Modified: 2019-04-22 20:29:19

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