Cassini Significant Event Report

For Week Ending 10/20/00

The most recent spacecraft telemetry was
acquired from the Goldstone tracking station on Wednesday, October 18th. The
Cassini spacecraft is in an excellent state of health and is operating normally. The speed of the spacecraft can be viewed on the "Where is Cassini Now?" web page.

Activities this week included the start of the fourth instance of the 5-Day
Repeating Template for Jupiter observations, Magnetospheric Imaging Instrument
(MIMI) Instrument Expanded Block (IEB) load, memory readout and high
voltage reset, Narrow Angle Camera (NAC) Body Vector Table (BVT) update to
optimize pointing for the Imaging Science Subsystem (ISS), Cosmic Dust
Analyzer (CDA) internal data prioritization, Radio and Plasma Wave Science
(RPWS) flight software patch, masking of an Attitude and Articulation
Control Subsystem (AACS) tachometer monitor, reinforcement of Latch Valve
11 open, High Watermark clear, and Reaction Wheel Assembly (RWA) momentum

A Preliminary Sequence Approval Meeting was held for cruise sequence 23.
At this meeting it was decided not to approve the sequence in order to
make an additional update to enhance Jupiter science return. The update
has since been incorporated. The Final Sequence Approval meeting will be
held next week with uplink of the sequence occurring at the end of the

The Jupiter Science Planning Virtual Team (SPVT) implementation activity
for C24 completed this week with all products handed off to the Sequence
Virtual Team (SVT). The success of this challenging effort is the result
of the many long hours and dedication on the part of the Science Planning
Team, other elements of the JPL Flight Team, and the distributed science
operations sites. The C24 sequence generation process began this week.
C24 will be in development over the two months with execution beginning in
mid January.

The Mission Planning Virtual Team (MPVT) began a post-Jupiter scoping
activity. This effort will last 6 weeks and will provide the Science
Planning Team with a list of specific activities, approximate dates,
consumable budgets, DSN coverage, and liens that apply for the Quiet
Cruise and Space Science subphases.

Version 11 of the Saturn Orbit Insertion sequence was delivered to the
Integration Test Laboratory.

The Cassini Navigation Ancillary Information Facility (NAIF) Instrument
and Frame Kernel Files (IK/FK) have been officially released. A list of
references and a Cassini Frames Hierarchy diagram was also distributed.
All materials are available on the Cassini Spacecraft, Planet,
Instruments, C-matrix, and Events kernels (SPICE) web page.

Outreach staffed an exhibit and teacher workshop at the California Science
Teachers Association annual convention in Sacramento last weekend.
Jupiter results and classroom lessons were featured. Overall attendance
was 2,300. The Millennium Flyby Travel Guide is in print and is also
available for download from HREF=""> .

Additional information about Cassini-Huygens is online at

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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