Attachment Ext.Ku int. study SES-LIC-20170726-00805

Attachment Ext.Ku int. study

This document pretains to SES-LIC-20170726-00805 for License on a Satellite Earth Station filing.

IBFS_SESLIC2017072600805_1245583

Exhibit For
SES Americom, LLC
Woodbine, Maryland
Vertex Corporation 9 Meter Earth Station

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 SES Americom, LLC satellite
earth station in Woodbine, 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° 22’ 36.8” N, 77° 04’ 47.4” W

• Satellite Location for Earth Station: From 12.0° W to 142.0° W

SES-15 (129° W) - Target

• Frequency Band: 13.75-14.0 GHz for uplink

• Polarizations: Linear

• Emissions: N0N, 100KG7W, 500KG9D, 1M00G7W, 30M0G7W, 36M0G7W, 54M0G7W and 72M0G7W

• Modulation: Digital

• Maximum Aggregate Uplink EIRP: 46.1 dBW for the N0N Carrier
60.0 dBW for the 100 kHz Carriers
67.1 dBW for the 500 kHz Carriers
70.0 dBW for the 1 MHz Carriers
84.8 dBW for the 30 MHz Carriers
85.0 dBW for the 36 MHz Carriers
85.0 dBW for the 54 MHz Carriers
85.0 dBW for the 72 MHz Carriers
• Transmit Antenna Characteristics
Antenna Size: 9.0 meters in Diameter
Antenna Type/Model: Vertex Corporation
Gain: 60.1 dBi

• RF power into Antenna Flange: No Modulation (N0N)
-14.0 dBW or -14.0 dBW/4 kHz (Maximum)

100 kHz
-0.1 dBW
or -14.0 dBW/4 kHz

500 kHz
7.0 dBW
or -14.0 dBW/4 kHz

1 MHz
9.9 dBW
or -14.0 dBW/4 kHz (Maximum)

30 MHz
24.7 dBW
or –14.1 dBW/4 kHz (Maximum)

36 MHz
24.9 dBW
or –14.6 dBW/4 kHz (Maximum)

54 MHz
24.9 dBW
or –16.4 dBW/4 kHz (Maximum)

72 MHz
24.9 dBW
or –17.6 dBW/4 kHz (Maximum)
• Minimum Elevation Angle:
Woodbine, Md 10.5° @ 106.4° Az.

• Side Lobe Antenna Gain: 32 - 25*log(θ)

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 station 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.

$500 kHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw- m2). = -14.0 dBw/4 kHz + (7.0) dBi – 10*log[4Π*(65900m)2] = -114.36 dBW/m2/4 kHz + Additional Path Losses (~63.0 dB) = -177.36 dBW/m2/4 kHz 1 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw- m2). = -14.0 dBw/4 kHz + (7.0) dBi – 10*log[4Π*(65900m)2] = -114.36 dBW/m2/4 kHz + Additional Path Losses (~63.0 dB) = -177.36 dBW/m2/4 kHz 30 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw- m2). = -14.1 dBw/4 kHz + (7.0) dBi – 10*log[4Π*(65900m)2] = -114.46 dBW/m2/4 kHz + Additional Path Losses (~63.0 dB) = -177.46 dBW/m2/4 kHz 36 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw- m2). = -14.6 dBw/4 kHz + (7.0) dBi – 10*log[4Π*(65900m)2] = -114.96 dBW/m2/4 kHz + Additional Path Losses (~63.0 dB) = -177.96 dBW/m2/4 kHz 54 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw- m2). = -16.4 dBw/4 kHz + (7.0) dBi – 10*log[4Π*(65900m)2] = -116.76 dBW/m2/4 kHz + Additional Path Losses (~63.0 dB) = -179.76 dBW/m2/4 kHz 72 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw- m2). = -17.6 dBw/4 kHz + (7.0) dBi – 10*log[4Π*(65900m)2] = -117.96 dBW/m2/4 kHz + Additional Path Losses (~63.0 dB) = -180.96 dBW/m2/4 kHz Our calculations identified additional path losses of approximately 63.0 dB including absorption loss and earth diffraction loss for the actual path profiles from the earth station to the nearest shoreline.$

The worst case calculated PFD when considering all carriers, including additional path losses to
the closest shoreline location is –177.36 dBW/m2/4 kHz. All carriers are a minimum of 10.36 dB
below the –167 dBW/ m2/4 kHz interference criteria of R&O 96-377. Therefore, there should be
no interference to the US Navy RADAR from the Woodbine earth station due to the distance and
the terrain blockage between the site and the shore.

3. Potential Impact to NASA’s Data Relay Satellite System (TDRSS)

The geographic location of the SES Americom earth station in Woodbine, 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 SES
Americom earth station in Woodbine, 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 9 meter earth
station antenna will have an EIRP less than 71 dBW/6 MHz for both the CW carrier, 100 kHz,
500 kHz and 1 MHz carriers in this band. The total EIRP for the CW Carrier is 46.1 dBW and the
equivalent EIRP per 6 MHz segment will remain at 46.1 dBW/6 MHz. The total EIRP for the 100
kHz, carriers is 60.0 dBW. The equivalent EIRP per 6 MHz segment will remain at 60.0 dBW/6
MHz. The total EIRP for the 500 kHz is 67.1 dBW. The equivalent EIRP per 6 MHz will remain
at 67.1 dBW/6 MHz. The total EIRP for the 1 MHz, carriers is 70.0 dBW. The equivalent EIRP
per 6 MHz segment will remain at 70.0 dBW/6 MHz. Therefore, there should not be interference
to the TDRSS space-to-space link for the CW carriers, 100 kHz, 500 kHz and 1 MHz carriers.

When considering the 30 MHz, 36 MHz, 54 MHz and 72 MHz carriers, the total EIRP of 84.8
dBW (30 MHz) 85.0 dBW (36 MHz), 85.0 dBW (54 MHz) and 85.0 dBW (72 MHz) equate to an
EIRP per 6 MHz of 80 dBW/6 MHz (30 MHz), 79.0 dBW/6 MHz (36 MHz), 76.0 dBW/6 MHz
(54MHz) and 73 dBW/6 MHz (72 MHz) respectively. To avoid interference to the TDRSS space-
to-space link the 30 MHz, 36 MHz, 54 MHz and 72 MHz carriers will not be used for the transmit
spectrum of 13.772 to 13.778 GHz by this earth station.

4. Coordination Issue 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 Woodbine facility and the US Navy and NASA systems
space-to-earth link are possible for all of the proposed carriers. Operations in NASA systems
space-to-space link (13772.0 to 13778.0 MHz) will also be permitted for all of the carriers with
the exception of the 30 MHz, 36 MHz, 54 MHz and 72 MHz emissions.

Document Created: 2017-04-13 13:43:51
Document Modified: 2017-04-13 13:43:51