Exhibit A

1567-EX-ST-2018 Text Documents

Viasat, Inc.

2018-09-07ELS_215503

Exhibit A Description of Request for Special Temporary Experimental Authority As an antenna manufacturer, Viasat, Inc. (“Viasat”) designs and produces a variety of fixed and aeronautical antennas supporting a wide variety of frequencies for both commercial and Government users. Viasat requests special temporary experimental authority to conduct performance testing on its next generation dual band mobile antenna, KuKarray Gen 2, in the 30.0 – 31.0 GHz band. The first generation KuKarray, whose Ka aperture is the M40, has already been granted blanket authority1 by the Commission to operate on Viasat satellites and experimental authority to operate on Viasat and other satellites2. The KuKarray Gen 2 and the Global Mantarray (the single band commercial Ka antenna version) has been granted blanket authority3 by the Commission to operate on Viasat owned satellites. Details of Testing The performance testing will be over-the-air using Inmarsat’s I5-F2 (“AOR”) and F3 (“POR”) geostationary satellites located at 55° W.L. and 180° W.L., respectively. Previously, successful testing took place in 4 fixed locations with the satellite beam centered on the test location under special temporary authority4 and mobile operations on an ESAA under special temporary authority5. This current request is to support the next phase of testing which requires the antenna to be operated on the aircraft while in flight. The test plan is to use I5’s HCX cross-strap channel capability to route the Mil-Ka uplink test carrier from the aero-terminal into the gateway downlink which is in the commercial Ka- band. The Inmarsat ground station for this I5-F2 gateway link is located at their Lino, Lakes, MN teleport and the I5-F3 gateway is in Auckland, New Zealand. Figure 1 is the downlink commercial Ka-band frequency EIRP power contour plot for Lino Lakes, MN. The tables below show the emission designators, frequencies and power levels requested for this testing. Peak Downlink Emission Peak Downlink Polarity Downlink Center Designat EIRP Density or EIRP Frequency [dBW/Hz] [dBW] [MHz] 20550 70M1M1D LHCP or 57.6 -20.8 RHCP 20285 70M1M1D LHCP or 57.6 -20.8 RHCP Table 1 Forward Link Downlink in Mil-Ka Frequency Band to Terminal 1 See Viasat, Inc., File No. SES-LIC-20120427-00404, Call Sign E120075 (granted July 17, 2013). 2 See Viasat, Inc. File No. 0015-EX-CM-2018, Call Sign WH2XTJ (granted February 26, 2018). 3 See Viasat, Inc. File No. SES-LIC-20180123-00055, Call Sign E180006 (granted April 17, 2018). 4 See Viasat, Inc. File No. 0451-EX-ST-2018, Call Sign WM9XMB (granted March 20, 2018). 5 See Viasat, Inc. File No. 0902-EX-ST-2018, Call Sign WM9XTO (granted June 05, 2018).

Uplink EIRP Uplink Center Emission Uplink Uplink Density at bore- Frequency Designat Polarizatio EIRP sight [dBW/Hz] [MHz] or n [dBW] 30350 50M6M1D RHCP 50.0 -27.0 30095 50M6M1D LHCP 50.0 -27.0 Table 2 Return Link Uplink in Mil-Ka Frequency Band from Terminal KuKarray Gen 2 Technical Information The figures below show the measured transmit gain plots for co-pol, and cross- pol in the azimuth and elevation planes at a worst-case skew angle of 90° and include radome in the measurement. Figure 1: Measured RHCP Transmit Terminal Antenna wide pattern cuts for worst case Skew angle 90°. These patterns are measured with radome.

12.6 dB Figure 2: Measured RHCP Transmit Terminal Antenna narrow pattern cuts (+/- 7.0°) for worst case Skew angle 90°. These patterns are measured with radome.

Figure 3: Measured LHCP Transmit Terminal Antenna wide pattern cuts for worst case Skew angle 90°. These patterns are measured with radome. 11.8 d Figure 4: Measured LHCP Transmit Terminal Antenna narrow pattern cuts (+/- 7.0 deg) for worst case Skew angle 90 deg. These patterns are measured with radome. • RHCP Transmit: (From Figure 2) o Minimum rejection at +/-2.5° is 9 dB o Minimum rejection at +/-5° is Min(12.6,14.0) = 12.6 dB • LHCP Transmit: (From Figure 4) o Minimum rejection at +/-2.5° is Min(7.9,7.4) = 7.4 dB o Minimum rejection at +/-5° is Min(11.8,14.6) = 11.8 dB

Figure 5: Measured RHCP Transmit Terminal Antenna wide pattern X-Pol cuts for worst case Skew angle 90°. These patterns are measured with radome. Figure 6: Measured RHCP Transmit Terminal Antenna narrow pattern X-Pol cuts (+/- 7.0°) for worst case Skew angle 90°. These patterns are measured with radome.

Figure 7: Measured LHCP Transmit Terminal Antenna wide pattern X-Pol cuts for worst case Skew angle 90°. These patterns are measured with radome. Figure 8: Measured LHCP Transmit Terminal Antenna narrow pattern X-Pol cuts (+/- 7.0°) for worst case Skew angle 90°. These patterns are measured with radome.

Flight Plan Planned flights for this experiment will take place in the United States and it’s Possessions. The complete details of the testing have been submitted to MILDEP SMO and prior coordination with AFSMO has been initiated. Please contact Jimmy Nguyen (Jimmy.Nguyen@us.af.mil) for coordination of this test and use of the requested spectrum. Stop Buzzer for Operation: Program Manager: Mike Mester (phone: 760 893 1980; mobile phone: 760 585 5076) Systems Engineer: Alton Earle (phone: 678 924 2653; mobile phone: 678 409 4356) Robert Ruggieri (mobile phone: 301-266-0924) or Boeing 24-hour NOC hotline: (855) 556- 1001 and email: bcssnoc@boeing.com

Figure 12: ViaSat KuKa Global Aero Terminal Figure 13: Viasat Certified KuKa Radome


Document Created: 2018-09-07 14:24:29
Document Modified: 2018-09-07 14:24:29
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