Attachment Exhibit A SES-AMD-INTR2019-02500

Attachment Exhibit A

This document pretains to SES-AMD-INTR2019-02500 for Amended Filing on a Satellite Earth Station filing.

IBFS_SESAMDINTR201902500_1747765

Exhibit A
Intelsat License LLC
Atlanta, Georgia

7.2KPK 7.2 Meter Earth Station

1. Background

This Exhibit is presented to demonstrate the extent to which the Intelsat License LLC ("Intelsat") satellite earth
station in Atlanta, Georgia is in compliance with the Federal Communications Commision ("FCC") Report and
Order 96-377. The potential inteference from the earth station to U.S. Navy shipboard radiolocation operations
("RADAR") and the National Aeronautics and Space Administration ("NASA") space research activities in the
13.75-14.0 GHz band is addressed in this exhibit. The parameters for the earth station are:

Coordinates (NAD83): 33° 39’ 50.4” N, 84° 16’ 18.7” W
Satellite Location for Earth Station: Galaxy -11 at 11˚W to 157˚W
Frequency Band: 13.75-14.00 GHz
Polarizations: Linear & Circular
Emissions: 72M0G7W
Modulation: FM/PCM/BPSK
Maximum Aggregate Uplink EIRP: 85 dBW for all Carriers
Transmit Antenna Characteristics
Antenna Size: 7.2 Meters in Diameter
Anenna Type/Model: 7.2KPK
Gain: 58.4 dBi
RF Power into Antenna Flange: 23 dBW or -14 dBW/4kHz
Minimum Elevation Angle: 5.2˚ @ 99.46˚ Azimuth
5.65˚ @ 260.22˚ Azimuth
Side Lobe Antenna Gain FCC Reference Pattern

Because the above uplink spectrum is shared with the Federal Government, coordination in this band requires
resolution data pertaining to potential interference between the earth stations and both U.S. Navy Department
and NASA systems. Potential intefference from the earth station could impact the U.S. Navy and/or NASA
systems in two areas. These areas are noted in GCC Report and Order 96-377 dated September 1996, and
consist of (1) Radiolocation and Radio Navigation, (2) Data Relay Satellites.

Summary of Coordination Issues:
a.) Potential Impact to Government Radiolocation (Shipboard Radar)
b.) Potential Impact to NASA Tracking and Data Relay Satellite Systems ("TDRSS")

$2. Potential Impact to Government Radiolocation (Shipboard Radar) Radiolocation operations ("RADAR") may occur anywhere in the 13.4-14.0 GHz frequency band aboard ocean- going U.S. Navy ships. FCC order 96-377 allocates the top 250 MHz of this 600 MHz band to the Fixed Satellite Service ("FSS") on a co-primary basis with the radiolocation operations and provides for an interference protection level of -167 dBW/m2/4kHz. The closest distance to the shoreline from Atlanta, Georgia earth station is approximately 369 km. The calculation of the power spectral density at this distance is given by: 1. Clear Sky EIRP (for highest density carrier): 81.4 dBW 2. Carrier Bandwidth: 20000 kHz 3. PD at antenna input: -14 dBW/4kHz 4. Transmit Antenna Gain: 58.4 dBi 5. Antenna Gain to Horizon: 11.1 dBi 6. Antenna Elevation Angles: 5.2˚ @ 99.5˚ azimuth 5.7˚ @ 260.2˚ azimuth The earth station will radiate interference toward the ocean according to its off-axis side-lobe performance. A conservative analysis, using FCC standard reference pattern, results in an off-axis antenna gain of 11.1 towards the nearest shoreline. The signal density at the shoreline, through free space is: PFD = Antenna Feed Power density (dBW/4kHz) + Antenna Off-Axis Gain (dBi) - Spread Loss (dBW/m 2) = -14dBW/4kHz + 11.1dBi - (10*log[4*PI*[369km]^2)) = -125.2 dBW/m/4kHz - Additional Path Losses (87 dB) Our calculation indicate additional path loss of approximately 87 dB including absorbtion loss and earth diffraction loss for the actual path profiles from the earth station to the nearest shoreline. The calculated PFD, including additional path losses to the closest shoreline, is -212.2dbW/ m^2/4 kHz. This is 45.2dB below the -167.0 dBW/ m^2/4 kHz interference criteria of the R&O 96-377. Therefore, there should be no interference to the U.S. Navy RADAR from the Atlanta, Georgia earth station due to the distance and the terrain blockage between the site and the shore. 3. Potential Impact to NASA's Tracking and Data Relay Satellite System The geographic location of the Intelsat earth station in Atlanta, Georgia is outside the 390 km radius coordination contour surrounding NASA's White Sands, New Mexico ground station complex. Therefore the TDRSS space-to-earth link will not be impacted by the Intelsat earth station in Atlanta, Georgia.$

The TDRSS space-to-space link in the 13.772 to 13.778 GHz band is assumed to be protected if an earth station
produces and EIRP of less than 71 dBW/6MHz in this band. The 7.2 meter earth station antenna will not
transmit in this band. Therefore, there will be no potential interference to the TDRSS space-to-space link.

4. Coordination Result Summary and Conclusions

The results of the analysis and calculation performed in this exhibit indicate that compatible operation between
the earth station at the Atlanta, Georgia facility and U.S. Navy and NASA TDRSS space-to-earth and space-to-
space links are possible. No interference to U.S. Navy RADAR or NASA TDRSS operations from the Atlanta,
Georgia site earth station should occur.

Document Created: 2019-06-24 14:09:07
Document Modified: 2019-06-24 14:09:07