DISH Operating LLC,

LETTER submitted by DISH Operating L.L.C.

Section 1.1204(a)(10(ii) Letter

2012-10-09

This document pretains to SAT-MOD-20100329-00058 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2010032900058_970649

Stephanie A. Roy 202 429 6278 sroy@steptoe.com 1330 Connecticut Avenue, NW Washington, DC 20036-1795 202 429 3000 main www.steptoe.com October 9, 2012 VIA IBFS Marlene H. Dortch Secretary Federal Communications Commission 445 12th Street, SW Washington, DC 20554 Re: DISH Operating L.L.C.; File Nos. SAT-MOD-20100329-00058, SAT-AMD-20100610-00127 (Call Sign 2740) Dear Ms. Dortch: With this letter, and pursuant to Section 1.1204(a)(10)(ii) of the Commission’s rules, DISH Operating LLC (“DISH”) reports on a telephone call held between representatives of DISH and Karl Kensinger and Chip Fleming of the International Bureau on matters relating to the above-referenced file numbers. In addition to the undersigned, also present on the call were Alison Minea, Darren Hamilton, and Shane Scott on behalf of DISH. On the call, Bureau staff asked DISH to provide additional information with respect to data submitted to the Commission in DISH’s September 28, 2012 response to a September 13, 2012 inquiry received from the Satellite Division of the International Bureau. Specifically, Bureau staff asked DISH to report on any gaseous helium (“GHe”) that will remain in the oxidizer tanks of the EchoStar 7 satellite at its end-of-life (“EOL”). Based on the volume of oxidizer tank #1, and assuming the remaining oxidizer mass is distributed approximately equally across both tanks based on historical pressure/temperature data, DISH calculates that, at EOL, the mass of GHe in a single oxidizer tank will be about 0.865 kg. Accordingly, the combined total mass of GHe distributed approximately equally across both oxidizer tanks will be about 1.73 kg. This value takes into account the vapor pressure of oxidizer at the historical pressure/temperature values.

Marlene H. Dortch October 9, 2012 Page 2 Bureau staff also asked DISH to estimate the amount of GHe that will remain in each of the two pressurant tanks at EchoStar 7’s EOL. DISH’s best estimate is that approximately ½ of the reported total remaining mass of GHe (as set forth in DISH’s letter of September 28, 2012) will remain in each pressurant tank at EOL. DISH asks that the chart submitted in its September 28, 2012 letter be considered updated with the above information. Please contact the undersigned should you have any questions with respect to the information submitted in this letter. Respectfully submitted, /s/ Stephanie A. Roy Counsel for DISH Operating L.L.C. Cc: Karl Kensinger Chip Fleming


Document Created: 2012-10-09 16:14:26
Document Modified: 2012-10-09 16:14:26
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