Attachment ViaSat Commission le

ViaSat Commission le

REQUEST submitted by IB, FCC

Commission letter Aug 15 2016

2016-08-15

This document pretains to SAT-MOD-20160527-00053 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2016052700053_1146238

Federal Communications Commission Washington, D.C. 20554 August 15, 2016 John P. Janka Latham & Watkins 555 Eleventh Street, NW Suite 1000 Washington, D.C. 20004 Re: ViaSat, Inc. IBFS File No. SAT—MOD—20160527—00053 Call Sign: $2902 Dear Mr. Janka: This letter requests additional information regarding ViaSat, Inc.‘s pending request to modify its grant of U.S. market access for the ViaSat—2 space station at the 69.9° W.L. orbital location by adding the 27.5—28.1 GHz (Earth—to—space) and 17.7—18.3 GHz (space—to—Earth) frequency bands to its grant of market access. To assist with the processing of this application, we request that ViaSat provide the following information:‘ 1) For the frequency band 17.7—17.8 GHz (space—to—Earth) please provide the predicted transmitting antenna off—axis gain information specified in Section 25.264(a) of the Commission‘s rules, 47 CFR § 25.264(a). In addition, please perform the power flux—density (pfd) calculations based upon this off—axis antenna gain information as specified in Section 25.264(b) and identify each prior—filed U.S. Direct Broadcast Satellite (DBS) space station at whose location the coordination threshold pfd level of —117 dBW/m?/100 kHz is exceeded. Although ViaSat considers the 61.5° W .L. ITU Region 2 Broadcasting—Satellite Service (BSS) Plan location in its application, its pfd calculations must take into account all prior— filed U.S. DBS space stations as defined in Section 25.264(b)(1). 2) Please provide an interference analysis as described in Section 25.140(b)(4)(iii) of the Commission‘s rules, 47 CFR § 25.140(b)(4)(iii), demonstrating that ViaSat‘s proposed operations in the 17.7—17.8 GHz (space—to—Earth) band will not cause more interference to any current or future 17/24 GHz BSS satellite networks than if the applicant were located at the precise Appendix F orbital location from which it seeks to offset. ViaSat‘s orbital location, 69.9° W.L., is offset 1.1 degrees from the 71° W.L. Appendix F orbital location." Accordingly, ViaSat‘s operations from this location must be at pfd levels that are reduced from those specified in Section 25.208(c) in accordance with the following calculation methodology: 147 CFR § 25.111(a). > The Establishment ofPolicies and Service Rulesfor the Broadcasting—Satellite Service at the 17.3—17—7 GHz Frequency Band and at the 17.7—17.8 GHz Frequency Band Internationally, and at the 24.75—25.25 GHz Frequency Bandfor Fixed Satellite Services Providing Feeder Links to the Broadcasting—Satellite Service andfor the Satellite Services Operating Bi—directionally in the 17.3—17.8 GHz Frequency Band, Report and Order and Further Notice of Proposed Rulemaking, 22 FCC Red 8842, Appendix F (rel. May 4, 2007).

For a given location on the surface of the Earth at which the required pfd reduction value needs to be determined, calculate the topocentric angular separation ‘¢ of the 71° W.L. and 67° W.L. geostationary orbital locations, and the corresponding off—axis gain GCO1(¢) of the antenna specified in Section 25.224(a)(1) of the Commission‘s rules at that angular separation. For the same location on the surface of the Earth, also calculate the topocentric angular separation of the 67° W.L. and 69.9° W .L. geostationary orbital locations, and the gain of the antenna GCO2(¢) specified in Section 25.224(a)(1) of the Commission‘s rules at that angular separation. Then, perform the subtraction GCO2(¢) — GCO1(¢). The result is the required reduction in pfd from the value specified in Section 25.208(c). Please demonstrate that under all atmospheric conditions, and for all angles of arrival, the pfd levels at the Earth‘s surface from ViaSat‘s transmissions in the 17.7—17.8 GHz (space—to—Earth) band will not exceed these calculated levels anywhere within the United States and its Territories. ViaSat must amend its market access request to address this request for additional information by September 13, 2016. Failure to do so may result in the dismissal of ViaSat, Inc.‘s request pursuant to Section 25.112(c) of the Commission‘s rules, 47 CFR § 25.112(e). Sincerely, xseAlbugu ose P. Albugu rque Chief, Satellite Division International Bureau


Document Created: 2016-08-15 16:34:04
Document Modified: 2016-08-15 16:34:04
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC