Cassini Significant Event Report

For Week Ending 07/24/98

Spacecraft Status:


The most recent Spacecraft status is from the DSN tracking pass on Wednesday, 07/22, over Goldstone.
The Cassini spacecraft is in an excellent state of health and is executing the C9 sequence nominally. The speed of the spacecraft can be viewed on the "Where is Cassini Now?" web page (http://saturn.jpl.nasa.gov/operations/present-position.cfm)


Inertial attitude control is being maintained using the spacecraft's hydrazine thrusters (RCS system). The
spacecraft continues to fly in a High Gain Antenna-to-Sun attitude. The downlink telemetry rate is presently
40 bps.


Spacecraft Activity Summary:


On Wednesday, 07/22, Periodic Instrument Maintenance (PIM) began execution, as planned. This activity is
carried out every three months by 11 of the 12 Orbiter instruments. This activity concludes Thursday (07/23).
PIM results will be reported in next week's Significant Events Report.


Also on Wednesday, the Solid State Recorder (SSR) record and playback pointers were reset. This
housekeeping activity, done approximately weekly, maximizes the amount of time that recorded engineering
data is available for playback to the ground should an anomaly occur on the spacecraft.


Upcoming events:


Activities scheduled for the week of 07/24 - 07/30 include: SSR FSW Partition Maintenance (7/24) and an
SSR Pointer Reset (7/29).



Additional information about Cassini-Huygens is online at http://saturn.jpl.nasa.gov.


Cassini will begin orbiting Saturn on July 1, 2004, and release its piggybacked Huygens probe about six months later for descent through the thick atmosphere of the moon Titan. Cassini-Huygens is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Office of Space Science, Washington, D.C.


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