Cassini Significant Events for 08/29/02 - 09/06/02

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Cassini Significant Events
for 08/29/02 - 09/06/02

The most recent spacecraft telemetry was acquired from the Goldstone
tracking station on Wednesday, September 4.  The Cassini spacecraft is
in an excellent state of health and is operating normally.  Information
on the present position and speed of the Cassini spacecraft may be found
on the "Present Position" web page located at
http://saturn.jpl.nasa.gov/cassini/english/where/ .

On-board activities this week included Radio and Plasma Wave Science
High Frequency Receiver calibrations, an autonomous Solid State Recorder
Memory Load Partition repair activity, and clearing of the ACS high
water marks.

To support critical Integrated Test Laboratory (ITL) activities,
building 230 generators were left running over the weekend.  On Tuesday,
power was switched back to Edison through the Uninterrupted Power Supply
(UPS). The system had been checked out over the past weeks with no
problems observed.  The switch-over went smoothly. The UPS batteries
supply short-term power and allow time to switch to the generators if
there is a problem with Edison power. It was reported at the weekly
Multi-mission Activities Planning Teleconference that having the
building 230 UPS system in operation the past few days prevented a few
dips in Edison power from causing problems.  Edison has been working to
prevent problems due to the fires in the area.

Visual and Infrared Mapping Spectrometer (VIMS) flight software version
5.1 was approved at a Software Requirements Certification Review meeting
for uplink to the spacecraft in October.

The VIMS instrument team released a draft evaluation of the Science
Opportunity Analyzer tool.  The team found it a very capable tool and
responded that with a few refinements and bug fixes, and a near term
official Cassini release, the team would be able to make very good use
of the product.

Phase one of a Workforce Analysis Study was presented at this week's
Cassini Design Team meeting. Three tour process were included, the
Science Operations Plan Update Process, Science and Sequence Update
Process, and the Maneuver Process.  The period time selected for the
study included part of tour sequences S12 through S18, and 18 separate
maneuvers.  Future updates will include sequence adaptability, and real
time commanding processes.

Cassini is a cooperative project of NASA, the European Space Agency and
the Italian Space Agency. The Jet Propulsion Laboratory, a division of
the California Institute of Technology in Pasadena, Calif., manages the
Cassini mission for NASA's Office of Space Science, Washington, D.C.

Cassini Outreach
Cassini Mission to Saturn and Titan
Jet Propulsion Laboratory
California Institute of Technology
National Aeronautics and Space Administration



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