Attachment Inclined

Inclined

LETTER submitted by Mobile Satellite Ventures LP

Letter re inclined orbit

2004-09-09

This document pretains to SAT-MOD-20040623-00120 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2004062300120_401326

sy — Mobile Satelite ventures ORIGINAL September 9, 2004 Via Hand Delivery RECEIVED Ms. Marlene H. Dortch Secretary seP — 9 2004 Federal Communications Commission 445 12th Street, S.W. Washington, D.C. 20554 Re: Mobile Satellite Ventures Subsidiary LLC Section 25.280 Notification of Operation of AMSC—I at 100.95°W at Inclined Orbit Dear Ms. Dortch Purstant to Section 25.280 of the Commission‘s rules, Mobile Satellte Ventures Subsidiary LLC (°MSV") hereby notifes the Commission thatit has commenced operation of its geostationary Mobile Satellite Service (°GSO MSS") satelite (AMSC—1) at 100.95°W in inclined orbit mode. 47 CER. § 25.280. Information required by Section 25.280(a) ofthe Commission‘s Rules: (1) The operator‘s name Mobile Satellite Ventures Subsidiary LLC (2) The date of commencement ofinclined orbit operations September 1, 2004. (3) Initial inclination Approximately 0.05°. (4) The rate of change in inclination per year Approximately 0.9° per year. Mobie Satelite ventures LP 1oste Parirage Bovevac. Rston, Vegni, 2o101—se10

Ms. Marlene H. Dortch September 9, 2004 Page2 ® "The expected end—oflife of the stellte accounting for inclined orbit operation. Beyond 2010. Information required by Section 25.280(6) ofthe Commission‘s Rules: (1) MSV will periodicallycorrect thsatellt atitude to achieve a stationary spacecraft antenna pattem on the surface ofthe Eath and centered on the satelte‘s designated service area. 47 CR §25.2800)(1). (2). MSV will control all interference to adjacent satellites, as a resultofoperating in an inclined orbit, to Tevels not to exceed that which would be caused by the satelite network operating without an inclined orbit. 47 CFR. §25.280(0)2). (3) MSV will not laim protection in exeess ofthe protection that would be received hy the satellite network operating without an inclined orbit. 47 C.ER. § 25.280(b)G). (4). MSV will continue to maintainits satelite at ts authorized longitude orbital Tocation in the GSO satellte are with the appropriate east—west station—keeping tolerance. 47 CFR. §252800)0). Please contact the undersigned with any questions regarding this matter. Very trily yours, Shon ut e Lon C. Levin cc: Thomas Tycz Karl Kensinger Robert Nelson

TECHNICAL CERTIFICATION T, James Thorpe, Senior Systems Bngineer ofMobile Satelite Ventures, cetify under peoalty ofperjory that: T am the technically quatifed person with overal| responsibiltyfor preperation ofhe technical nformation contained in the foregoing leter. The information contained in the letter is 1rue and correct to the best ofmy belie. Senior System Engineer September9, 2004


Document Created: 2004-10-15 15:56:10
Document Modified: 2004-10-15 15:56:10
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