I3F4 Deorbit Letter.

LETTER submitted by Inmarsat plc

I3F4 Deorbit Letter

2016-05-23

This document pretains to SAT-PPL-20090107-00003 for Permitted List on a Satellite Space Stations filing.

IBFS_SATPPL2009010700003_1136753

May 23, 2016 BY ELECTRONIC FILING Marlene H. Dortch Office of the Secretary Federal Communications Commission 445 Twelfth Street, S.W. Washington, DC 20554 Re: Deorbiting of Inmarsat-3 F4 Satellite Dear Ms. Dortch: Inmarsat plc (“Inmarsat”), by its counsel, hereby gives notice that it has successfully deorbited its Inmarsat-3 F4 space station (“I3F4,” call sign S2783). This satellite served the U.S. market from the 54º W.L. orbital location,1 until its recent replacement by the Inmarsat-3 F5 spacecraft.2 The deorbiting was completed on May 11, 2016. The final measured orbit of the I3F4 satellite is 217 km above the geostationary arc, with a perigee of 177 km. In the course of de-orbiting the satellite, Inmarsat depleted the propellant tanks, discharged the batteries, disconnected the power from the bus, and shut off the transmitters. Please update the Commission’s records to reflect the deorbiting of this space station. If you have any questions, please do not hesitate to contact me at 202-730-1350. Sincerely yours, /s/ William M. Wiltshire Counsel for Inmarsat plc cc: Jose Albuquerque Karl Kensinger 1 See Grant Stamp, IBFS File Nos. SAT-PPL-20090107-00003 and SAT-APL-20090115-00005 (Apr. 6, 2009). See also Comsat Corp., 16 FCC Rcd. 21611 (2001) (original market access grant). 2 See Grant Stamp, IBFS File No. SAT-PPL-20160111-00001 (Apr. 7, 2016).


Document Created: 2019-04-11 00:26:02
Document Modified: 2019-04-11 00:26:02
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