Attachment Exhibit A SES-STA-INTR2019-01158

Attachment Exhibit A

This document pretains to SES-STA-INTR2019-01158 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTAINTR201901158_1662382

EXHIBIT A

Intelsat License LLC
Hagerstown, Maryland

GD Satcom 4.8 Meter Earth Station

1. Background
This Exhibit is presented to demonstrate the extent to which the Intelsat License LLC ("Intelsat") satellite
earth station in Hagerstown, Maryland 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): 39° 35’ 59.0” N, 77° 45’ 29.0” W
Satellite Arc Range for Earth Station: Telstar 14R at 25˚W to 133˚W
Frequency Band: 13.75-14.00 GHz
Polarizations: Linear & Circular
Emissions: 56K0G7W
Modulation: FM/PCM/PSK
Maximum Aggregate Uplink EIRP: 80.7dBW for all Carriers
Transmit Antenna Characteristics
Antenna Size: 4.8 Meters in Diameter
Anenna Type/Model: GD Satcom
Gain: 55.2 dBi
RF Power into Antenna Flange: 25.5 dBW or 14 dBW/4kHz
Minimum Elevation Angle: 14.05˚ @ 248.46˚ Azimuth
15.55˚ @ 249.97˚ 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 250MHz 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 Hagerstown, Maryland earth station is approximately 131 km. The calculation of the power spectral density at this distance is given by: 1. Clear Sky EIRP: 80.7 dBW 2. Carrier Bandwidth: 56 kHz 3. PD at antenna input: 14 dBW/4kHz 4. Transmit Antenna Gain: 55.2 dBi 5. Antenna Gain to Horizon: 0.3 dBi 6. Antenna Elevation Angles: 14.1˚ @ 248.5˚ azimuth 15.6˚ @ 250˚ 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 0.3 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/m2) = 14dBW/4kHz + 0.3dBi - (10*log[4*PI*[131km]^2)) = -99 dBW/m/4kHz - Additional Path Losses (69 dB) Our calculation indicate additional path loss of approximately 69 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 -168dbW/ m^2/4 kHz. This is 1dB 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 Hagerstown, Maryland 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 Hagerstown, Maryland 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 Hagerstown, Maryland.$

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 4.8 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 Hagerstown, Maryland 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 Hagerstown, Maryland site earth station should occur.

Document Created: 2019-04-22 15:37:13
Document Modified: 2019-04-22 15:37:13