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- Newsgroups: sci.space.news
- Path: sparky!uunet!think.com!ames!dont-send-mail-to-path-lines
- From: baalke@kelvin.jpl.nasa.gov (Ron Baalke)
- Subject: TOPEX Update - 12/22/92
- Message-ID: <1992Dec28.072625.15927@news.arc.nasa.gov>
- Followup-To: sci.space
- News-Software: VAX/VMS VNEWS 1.3-4
- Keywords: TOPEX, JPL, CNES
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: kelvin.jpl.nasa.gov
- Reply-To: baalke@kelvin.jpl.nasa.gov
- Organization: Jet Propulsion Laboratory
- Date: Mon, 28 Dec 1992 15:24:53 GMT
- Approved: sci-space-news@ames.arc.nasa.gov
- Lines: 53
-
- Forwarded from:
- PUBLIC INFORMATION OFFICE
- JET PROPULSION LABORATORY
- CALIFORNIA INSTITUTE OF TECHNOLOGY
- NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
- PASADENA, CALIF. 91109. (818) 354-5011
-
- TOPEX/POSEIDON STATUS REPORT
- December 22, 1992
-
- The satellite continues to be operational and healthy.
- On Dec. 21, the ninth 10-day repeat track cycle was completed.
-
- A second orbit maintenance maneuver was also
- successfully performed yesterday at the start of cycle 10. Two
- small thrusters were fired for four seconds to raise the
- satellite's 830 mile altitude by about 22 feet. The fine-tuning
- of the orbit maintains the repeating ground tracks within the
- desired band.
-
- On Saturday, Dec. 19, the altimeter experienced a 17
- hour loss of altimeter data. Engineering data was received
- during this gap. While the cause of the data loss is still under
- investigation, a single event upset is thought to be the likely
- culprit. The data gap ended when the altimeter reset itself.
- The altimeter is currently tracking nominally.
-
- On Dec. 10, the project participated in a special
- TOPEX/Poseidon session at the American Geophysical Union meeting
- in San Francisco. Participants from NASA and CNES confirmed
- that the initial science data is good and said they are pleased
- with how quickly data is being processed and made available to
- the science community.
-
- Early results from the NASA Altimeter have been
- processed to show wave height, eddies and ocean topography.
- Scientists report that these preliminary results show that the
- satellite is working as expected.
-
- On Dec. 8 the first improved attitude control system
- calibration parameters were sent to the satellite resulting in
- dramatic improvement in the altimeter pointing and its
- variations. Today, the altimeter bias offset was changed by 0.1
- degree to further reduce the small altimeter pointing error.
-
- #####
- ___ _____ ___
- /_ /| /____/ \ /_ /| Ron Baalke | baalke@kelvin.jpl.nasa.gov
- | | | | __ \ /| | | | Jet Propulsion Lab |
- ___| | | | |__) |/ | | |__ M/S 525-3684 Telos | Choose a job you love, and
- /___| | | | ___/ | |/__ /| Pasadena, CA 91109 | you'll never have to work
- |_____|/ |_|/ |_____|/ | a day in your life.
-
-