Supplemental Letter

SUPPLEMENT submitted by EchoStar Satellite Operating Corporation and EchoStar Operating L.L.C.

Supplemental Letter

2017-07-12

This document pretains to SES-MFS-20170626-00677 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2017062600677_1247255

July 12, 2017 By IBFS Marlene H. Dortch Secretary Federal Communications Commission 445 12th Street, SW Washington, D.C. 20554 Re: Modification Applications to Move and Operate EchoStar 12 at 86.4° W.L. IBFS File Nos. SAT-MOD-20170626-00099, SES-MFS-20170626-00678 & SES-MFS-20170626-00677 (Call Sign S2741, E020248 & E070273) Dear Ms. Dortch: EchoStar Satellite Operating Corporation and EchoStar Operating L.L.C. (collectively, “EchoStar”) submit this supplemental letter to clarify that the above-referenced license modification applications (“Applications”) seek authorization both to drift the EchoStar 12 satellite to 86.4° W.L. and to operate the satellite at 86.4° W.L. on a regular basis, in addition to adding the satellite at 86.4° W.L as a point of communications for telemetry, tracking, and control (“TT&C”) operations with existing earth stations in Blackhawk, SD, and Quicksburg, VA. EchoStar further clarifies that TT&C communications required to drift EchoStar 12 to 86.4° W.L. and operate the satellite at 86.4° W.L. on a regular basis will be conducted on the same frequencies specified in the Technical Annex filed with the Applications. 1 Please direct any questions regarding this matter to the undersigned. Sincerely, /s/ Jennifer A. Manner Jennifer A. Manner Senior Vice President, Regulatory Affairs cc: Stephen Duall Paul Blais 1 See Applications, Attachment A (Technical Annex), at 2-3. EchoStar Satellite Operating Corporation 100 Inverness Terrace East • Englewood, CO 80112 • Tel: 303.706.4000


Document Created: 2017-07-12 13:59:16
Document Modified: 2017-07-12 13:59:16
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