Attachment letter

letter

LETTER submitted by PanAmSat

letter

2006-07-27

This document pretains to SAT-STA-20051020-00205 for Special Temporal Authority on a Satellite Space Stations filing.

IBFS_SATSTA2005102000205_523946

LAW OFFICES GOLDBERG, GODLES, WIENER & WR 1229 NINETEENTH STREET, N.W. WASHINGTON, D.C. 20036-2413 HENRY GOLDBERG JOSEPH A. GODLES (202) 429-4900 JONATHAN L. WIENER TELECOPIER: LAURA A. STEFAN1 (202) 429-4912 - DEVENDRA (“DAVE”) KUMAR e-mail: HENRIETTA WRIGHT THOMAS G. GHERARDI, PC. general62g2w2.com website: www.g2w2.com - COUNSEL THOMAS S. TYCZ* SENIOR POLICY ADVISOR ‘NOT AN ATTORNEY July 27,2006 RECEIVED - ’?’ BY HAND Robert G. Nelson JUL 2 7 2006 Chief, Satellite Division Federal Communications Commission 445 12th Street, SW Washington, DC 20554 Re: SBS-6, Response to Information Request Regarding Application for License Modification or, in the Alternative, Request for Special Temporary Authority IBFS File Nos. SAT-MOD-2005 1020-00204 and SAT-STA-2005 1020-00205 - -- Dear Mr. Nelson: This letter responds to your request of May 11,2006, for further information from PanAmSat Licensee Corp. (“PanAmSat”) concerning its applications for an extension of the license term for SBS-6 or, in thc alternative, for Special Temporary Authority (“STA”) to operate SBS-6 for a period of 180 days after the license expires.’ In response to your specific questions: (1) PanAmSat plans to use a disposal altitude at the end of life of SBS-6 of 150 km above the geostationary orbit. (2) PanAinSat has reserved 6.5 lbs. of bi-propellant to accomplish a 150 km deorbit altitude. The reserved fuel figure was determined by the spacecraft manufacturer and provided for in the propellant budget. To calculate this figure, the manufacturer used the “rocket equation,” ie.,it plugged in the I As a result of an oversight, this letter was not submitted within the 30-day time frame that you had requested. PanAmSat apologizes for the delay. - -- -_ -7--?-----

expected mass of the satellite at end of life and the required delta-velocity to achieve the desired orbit. PanAmSat has established a 2-sigma fuel reserve allowance to account for fuel gauging uncertainty. ( 3 ) The fuel that is estimated to be available to SBS-6 as of July 24,2006, consists of 64.6 lbs. of oxidizer and 42.2 lbs. fuel. (4) PanAmSat has not experienced any in-orbit anomalies with SBS-6 that could cause loss of control of the spacecraft or prevent post-mission disposal. ( 5 ) Stored energy will be removed at the spacecraft’s end of life by depleting all propellant tanks and leaving fuel line valves open, venting all pressurized systems, leaving all batteries in a permanent discharged state, and turning off all active units. . Finally, PanAmSat confirms that it intends to maintain the assigned orbital longitude of SBS-6 in the east-west direction within +/- 0.05 degrees during the remainder of the satellite’s operational life. Please direct any questions with respect to this matter to the undersigned. ,


Document Created: 2006-08-24 09:11:25
Document Modified: 2006-08-24 09:11:25
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