Attachment Exhibit A SES-STA-20160408-00337

Attachment Exhibit A

This document pretains to SES-STA-20160408-00337 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2016040800337_1133128

Exhibit A

Intelsat License LLC
Hagerstown, Maryland
TIF 14.2 Meter Earth Station
Call Sign: KA258

Compliance with FCC Report & Order (FCC96-377) for the 13.75 - 14.0 GHz Band
Analysis and Calculations

1. Background

This Exhibit is presented to demonstrate the extent to which the Intelsat License LLC satellite
earth station in Hagerstown, Maryland is in compliance with FCC REPORT & ORDER 96-377.
The potential interference from the earth station to US Navy shipboard radiolocation operations
(RADAR) and the NASA space research activities in the 13.75 - 14.0 GHz Band is addressed in
this exhibit. The parameters for the earth station are:

Table 1. Earth Station Characteristics

 Coordinates (NAD83): 39° 35’ 54.0” N, 77° 45’ 33.0” W

 Satellite Location for Earth Station: IS-31 at 6 W to 149 W

 Frequency Band: 13.75-14.5 GHz for uplink

 Polarizations: Circular

 Emissions: 900KFXD

 Modulation: FM/PCM/PSK

 Maximum Aggregate Uplink EIRP: 88dBW for all Carriers

 Transmit Antenna Characteristics
Antenna Size: 14.2 meters in Diameter
Antenna Type/Model:
Gain: 64.5 dBi @ 14.00 GHz

 RF power into Antenna Flange: 25.5 dBW or 2.0 dBW/ MHz (Maximum)

 Minimum Elevation Angle:
Hagerstown, Md. 5.5 @ 101.9Az.
5.7 @ 257.8 Az.

 Side Lobe Antenna Gain: 29 - 25*log()

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

Summary of Coordination Issues:

1) Potential Impact to Government Radiolocation (Shipboard Radar)
2) Potential Impact to NASA Data Relay Satellite Systems (TDRSS)

2. Potential Impact to Government Radiolocation (Shipboard Radar)

Radiolocation operations (RADAR) may occur anywhere in the 13.4 - 14 GHz frequency band
aboard ocean going United States Navy ships. The Federal Communication Commission (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/m2/4 kHz.

The closest distance to the shoreline from the Hagerstown earth station is approximately 131km
south-east toward the Atlantic Ocean. The calculation of the power spectral density at this
distance is given by:

1. Clear Sky EIRP: 88 dBW
2. Carrier Bandwidth : 900 kHz
3. PD at antenna input: 2.0 dBW/4kHz
4. Transmit Antenna Gain: 64.5 dBi
5. Antenna Gain Horizon: 29 - 25*log()
6. Antenna Elevation Angles: 5.57˚ @ 257.89˚ Azimuth
5.43˚ @ 101.97˚ 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
maximum off-axis antenna gain of 10.4 dBi towards the Atlantic Ocean.

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) = 2.0 dBW/4kHz + 10.4 dBi – 10*log[4π*(131000m)2) = -101 dBW/ m2/4 kHz + Additional Path Losses (~69 dB) Our calculations indicate additional path loss of approximately 69.0 dB including absorption 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 -170.0 dbW/ m2/4 kHz. This is 3.0 dB below the -167 dBW/ m2/4 kHz interference criteria of the R&O 96- 377. Therefore, there should be no interference to the US Navy RADAR from the Hagerstown 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 (TDRSS) The geographic location of the Intelsat License LLC 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 License LLC 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 an EIRP less than 71 dBW/6 MHz in this band. The 14.2 meter earth station antenna will not be operating in 13.772 to 13.778 GHz band and consequently the TDRSS space-to-space link will be protected. 4. Coordination Result Summary and Conclusions The results of the analysis and calculations performed in this exhibit indicate that compatible operation between the earth station at the Hagerstown, Maryland facility and the US Navy and NASA systems space-to-earth link are possible. These analyses have been based on the assumption of 900 kHz bandwidth carriers. No interference to US Navy RADAR operations, TDRSS space-to-earth link, or TDRSS space-to-space link will occur from the Hagerstown, Maryland site earth station.$

Document Created: 2016-04-08 17:39:42
Document Modified: 2016-04-08 17:39:42