Significant Event Report for Week Ending 9/25/1998

Cassini Significant Event Report

For Week Ending 09/25/98

Spacecraft Status:

The most recent Spacecraft status is from the DSN tracking pass on Wednesday, 09/23, over Goldstone. The Cassini spacecraft is in an excellent state of health and is executing the C10 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)

Spacecraft Activity Summary:

Two activities were performed on Wednesday, 09/23. First, routine maintenance was performed on the SSR flight software
partitions, and a housekeeping activity was performed which reads out a set of AACS Attitude Estimator measurements not available
in regular engineering telemetry.

Next, the quarterly Periodic Engineering Maintenance was performed as planned on board the spacecraft. This activity consists of 3
parts: the AACS BAIL Maintenance, the Reaction Wheel Assembly (RWA) exercise, and the Engine Gimbal Actuator (EGA)
exercise.

Upcoming events:

Activities scheduled for the week of 09/25 - 10/01 include: SSR FSW Partition Maintenance, AACS High Watermark Clear,
AACS ATE MRO, and ranging passes on 09/27, SSR Pointer Reset on 09/30.

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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