Attachment Extended Ku-band SES-STA-20150605-00331

Attachment Extended Ku-band

This document pretains to SES-STA-20150605-00331 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2015060500331_1090074

Exhibit For
Denali 20020, LLC
Vernon, New Jersey
(Call Sign: E080162)
Vertex / RSI 11.0 Meter KPK 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 licensed Denali 20020, LLC.
satellite earth station (E080162), which is being modified in Vernon, New Jersey, 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): 41° 12’ 10.0” N, 74° 31’ 39.0” W

• Satellite Location for Earth Station: From 3.0° W to 136.0° W
Telstar-11N (37.5° W)

• Frequency Band: 13.75-14.0 GHz for uplink

• Polarizations: Linear and Circular

• Emissions: 1M00G7W
36M0G7W

• Modulation: Digital

• Maximum Aggregate Uplink EIRP: 71.0 dBW for the 1 MHz Carriers
76.9 dBW for the 36 MHz Carriers

• Transmit Antenna Characteristics
Antenna Size: 11.0 meters in Diameter
Antenna Type/Model: Vertex/RSI
Gain: 62.2 dBi

• RF power into Antenna Flange: 1.0 MHz
8.8 dBW, or 8.8 dBW/MHz
or -15.2 dBW/4 kHz (Maximum)

36 MHz
14.7 dBW or -0.9 dBW/MHz
or -24.9 dBW/4 kHz (Maximum)

• Minimum Elevation Angles:
Vernon Valley, NJ 29.3° @ 131.1° Az. (Telstar-11N) at 37.5° W

• 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.

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 Vernon, New Jersey earth station is approximately
71.62 km Southeast toward New York City, NY. The calculation of the power spectral density
at this distance is given by:
1 MHz 36 MHz

1. Clear Sky EIRP: 71.0 dBW 76.9 dBW
2. Carrier Bandwidth: 1 MHz 36 MHz
3. PD at antenna input: -15.2 -24.90
dBW/4 kHz
4. Transmit Antenna Gain: 62.2 dBi
5. Antenna Gain Horizon: FCC Reference Pattern
6. Antenna Elevation Angle : 29.3°

$The earth station will radiate interference toward New York City, New York according to its off- axis side-lobe performance. A conservative analysis, using FCC standard reference pattern, results in off-axis antenna gains of -4.6 dBi toward the New York City, New York, harbor. The signal density at the shoreline, through free space is: 1 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw-m2). = -15.2 dBw/4 kHz + (-4.6) dBi – 10*log[4Π*(71620m)2] = -127.9 dBW/m2/4 kHz + Additional Path Losses (~72.8 dB) = -200.7 dBW/m2/4 kHz 36 MHz Carriers PFD = Antenna Feed Power density (dBW/4 kHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBw-m2). = -24.9 dBw/4 kHz + (-4.6) dBi – 10*log[4Π*(71620m)2] = -137.6 dBW/m2/4 kHz + Additional Path Losses (~72.8 dB) = -210.4 dBW/m2/4 kHz Our calculations show additional path loss of approximately 72.8 dB including absorption loss and earth diffraction loss for the actual path profiles from the proposed earth station to the nearest shoreline. The calculated PFD including additional path losses to the closest shoreline location is –200.7 dBW/m2/4 kHz for the 1 MHz carriers. The calculated PFD including additional path losses to the closest shoreline location is –210.4 dBW/m2/4 kHz for the 36 MHz carriers. This is 33.7 dB (1 MHz) and 43.4 dB (36 MHz) below the –167 dBW/m2/4 kHz interference criteria of R&O 96- 377. Therefore, there should be no interference to the US Navy RADAR from the Vernon earth station due to the distance and the terrain blockage between the site and the shore. 3. Potential Impact to NASA’s Data Relay Satellite System (TDRSS) The geographic location of the Denali 20020, LLC. earth station in Vernon, New Jersey is outside the 390 km radius coordination contour surrounding NASA’s White Sands, New Mexico ground station complex. Therefore, the TDRSS space-to-earth link will not be impacted by the Denali 20020, LLC. earth station in Vernon, New Jersey.$

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 11.0 meter earth
station antenna will have an EIRP less than 71 dBW/6 MHz for the 1 MHz carriers in this band.
The EIRP for the 1 MHz carriers is 71.0 dBW. The equivalent EIRP per 6 MHz segment will be
70.83 dBW/6 MHz. Therefore, there should not be interference to the TDRSS space-to-space
link for the 1 MHz carriers.

For the 36 MHz carriers, the EIRP of 76.9 dBW, will equate to an EIRP per 6 MHz of 70.9
dBW/6 MHz. Since this level will also be less than the 71.0 dBW/6 MHz threshold, there will
not be interference to the TDRSS space-to-space link from the 36 MHz carriers. Therefore, at the
76.9 dBW power level, there should not be interference to the TDRSS space-to-space link for the
36 MHz carriers.

4. Coordination Issue Result Summary and Conclusions

The results of the analysis and calculations performed in this exhibit indicate that compatible
operations between the earth station at the Vernon facility and the US Navy and NASA systems
space-to-earth link and NASA systems space-to-space link (13772.0 to 13778.0 MHz) will be
permitted for the 1 MHz through 36 MHz carriers.

Document Created: 2015-06-05 16:08:07
Document Modified: 2015-06-05 16:08:07