FCC_EchoStar 1_De-Or

NOTICE submitted by EchoStar Satellite Operating Corporation

ESOC_Notification of E1 Deorbit_01312018

2018-01-31

This document pretains to SAT-LOA-20150512-00034 for Application to Launch and Operate on a Satellite Space Stations filing.

IBFS_SATLOA2015051200034_1332332

January 31, 2018 By Electronic Filing Marlene H. Dortch Secretary Federal Communications Commission 445 Twelfth Street, S.W. Washington, D.C. 20054 Re: End-of-life Disposal of EchoStar 1 IBFS File Nos. SAT-LOA-20150512-00034 Call Sign S2739 Dear Ms. Dortch: EchoStar Satellite Operating Corporation (ESOC) hereby notifies the Commission that the EchoStar 1 satellite has successfully completed end-of-life deorbit maneuvers and has been placed into a disposal orbit more than 350 km. above the geostationary arc, consistent with of the terms and conditions of its license and 47 C.F.R. § 25.283. EchoStar does note that during the de-orbit of EchoStar 1, a propulsion pyro valve located between the two hydrazine tanks was left unfired following the tank venting due to an increased risk associated with inadvertently igniting any residual hydrazine vapors and droplets remaining inside the propellant lines near the pyro valve. The risk associated with the unintentional firing of the propulsion pyro is very low considering the electrical properties required to ignite the pyro are not a naturally occurring possibility and was discussed with members of the International Bureau after the fact. Please direct any questions regarding this matter to the undersigned. Respectfully submitted, /s/ Jennifer A. Manner Jennifer A. Manner Senior Vice President, Regulatory Affairs EchoStar 301-428-5839 cc: Stephen Duall Kathyrn Medley Karl Kensinger EchoStar Corporation 100 Inverness Terrace East • Englewood, CO 80112 • Tel: 303.706.4000


Document Created: 2018-01-31 08:57:24
Document Modified: 2018-01-31 08:57:24
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