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- From: baalke@kelvin.jpl.nasa.gov (Ron Baalke)
- Subject: Magellan Update - 12/29/92
- Message-ID: <30DEC199200152402@kelvin.jpl.nasa.gov>
- News-Software: VAX/VMS VNEWS 1.41
- Keywords: Magellan, JPL
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: kelvin.jpl.nasa.gov
- Organization: Jet Propulsion Laboratory
- Date: Wed, 30 Dec 1992 00:15:00 GMT
- Lines: 38
-
- Forwarded from Doug Griffith, Magellan Project Manager
-
- MAGELLAN STATUS REPORT
- December 29, 1992
-
- 1. The Magellan spacecraft continues to operate normally, performing
- a desat (desaturation of the reaction wheels) in each 3-hour orbit,
- a starcal (star calibration) on every other orbit, and transmitting
- a carrier signal (plus X-band telemetry) which is precisely tracked
- by the DSN (Deep Space Network) stations to extract gravity data.
-
- 2. On Sunday, December 20, the spacecraft performed two radio
- occultation experiments. As the spacecraft passed behind Venus (as
- viewed from Earth), the S- and X-band signals were carefully monitored
- at the DSS-14 station at Goldstone.
-
- 3. Magellan performed a limb-tracking maneuver on both ingress and
- egress. In this way, the received signal passed through the
- atmosphere of Venus as it was refracted around the limb. S-band
- communication was maintained through the entire period of occultation.
- The X-band signal was tracked partway through both in entry and exit
- portions of the occultations.
-
- 4. Radio science investigators Dr. Paul Steffes of Georgia Tech, and
- Dr. Jon Jenkins of the SETI Institute/NASA Ames Research Center,
- expect the data to yield information on the thermal structure and
- abundance of sulfuric acid vapor as well as average electron density
- profiles of the Venus atmosphere.
-
- 5. The spacecraft has completed 6426 orbits of Venus; 790 so far in
- Cycle-4, which will end on May 25, 1993. Cycle-4 is 43% complete.
- ___ _____ ___
- /_ /| /____/ \ /_ /| 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.
-
-