E110036_Certificatio

OTHER submitted by ViaSat, Inc.

Certification of Commencement of Operation

2012-09-12

This document pretains to SES-LIC-20110318-00323 for License on a Satellite Earth Station filing.

IBFS_SESLIC2011031800323_965988

Amended Exhibit A Description of Application ViaSat, Inc. (“ViaSat”) seeks authority to operate a 7.3 meter Model VA-73-KA gateway-type antenna in the Ka-band in the vicinity of Sanderson, Texas to communicate with the VIASAT-1 satellite, which is expected to be launched this summer. The antenna will operate in the 18.3-19.3 GHz and 19.7-20.2 GHz downlink bands and the 28.1-29.1 GHz and 29.5-30.0 GHz uplink bands, each of which has been approved for service over VIASAT-1 (FCC Call Sign S2747). ViaSat intends to use this antenna for gateway operations for VIASAT-1. To the extent necessary, ViaSat requests a waiver of the U.S. Table of Frequency Allocations to allow the gateway earth station to receive communicates from VIASAT-1 in the 18.8-19.3 GHz frequencies on a non-conforming basis.1 ViaSat also requests a partial waiver of the requirement in Section 25.138(d) to provide antenna patterns for angles to +/- 180 degrees. ViaSat includes in this application antenna patterns for angles to +/- 45 degrees which demonstrate that the antenna performance complies with the off-axis power density limits in Section 25.138. Consistency with GSO, NGSO and Terrestrial Operations As a general matter, the proposed operation of this antenna is compatible with the operation of adjacent GSO systems, NGSO systems and primary terrestrial users in the 18.3-19.3 GHz and 19.7-20.2 GHz downlink bands and the 28.1-29.1 GHz and 29.5-30.0 GHz uplink bands. The Commission has approved the VIASAT-1 satellite for operation on these frequency bands.2 The VIASAT-1 Authorization allows the spacecraft to operate (i) in the 28.6-29.1 GHz band on a secondary basis, (ii) in the 28.10-28.35 GHz on a secondary basis, and (iii) in the 18.8- 19.3 GHz band on a non-conforming basis pursuant to a grant of a waiver of Section 2.106 of the Commission’s rules, and specifically footnote NG165 thereto. Section 25.132(a)(2) provides that transmitting earth stations operating in the 20/30 GHz band must demonstrate compliance with Section 25.138.3 The antenna meets the performance requirements in Section 25.138(a) in the direction of the GSO arc, as well as in all other directions, as illustrated by the off-axis EIRP spectral density plots attached hereto as Exhibit B. Further, as established in the Commission’s authorization for the VIASAT-1 satellite, the power flux-density at the earth’s surface produced by emissions from VIASAT-1 are within the -118 dBW/m2/MHz limit set forth in Section 25.138(a)(6). In addition, to the extent required for protection of received satellite signals pursuant to Section 25.138(e), the proposed earth station conforms to the antenna performance standards in Section 25.209, as demonstrated by the antenna gain patterns attached hereto as Exhibit C. ViaSat includes all patterns in digitized and tabular format for all angles up to +/-45 degrees, including the off-axis EIRP density envelope 1 47 C.F.R. § 2.106, n.NG165. 2 See File Nos. SAT-LOI-20080107-00006, SAT-AMD-20080623-00131, and SAT-AMD- 20090213-00023 (granted by date stamp, with conditions, on Aug. 18, 2009) (“VIASAT- 1 Authorization”). 3 47 C.F.R. § 25.132(a)(2).


Document Created: 2012-09-12 13:25:32
Document Modified: 2012-09-12 13:25:32
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