Cassini Significant Events for 10/17/02 - 10/23/02

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Cassini Significant Events
for 10/17/02 - 10/23/02

The most recent spacecraft telemetry was acquired from the Madrid
tracking station on Wednesday, October 23.  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 included setting of the CDS flight software
equivalency bit, a memory readout of Assisted Load Format addresses for
beginning and end of flight software loads, a Reaction Wheel Assembly
momentum unload, a Stellar Reference Unit calibration, transition from
Reaction Wheel to Reaction Control Subsystem control, and a high
watermark clear.

Additional instrument activities included Radio and Plasma Wave Science
(RPWS) High Frequency Receiver calibrations and Imaging Science
Subsystem (ISS), Visible and Infrared Mapping Spectrometer, and
Ultraviolet Imaging Spectrograph stellar observations of Fomulhaut,
Canopus, epsilon Orionis, alpha Leonis, lambda Scorpii and eta Ursa
Majori.  ISS performed a geometric calibration and observations of
Saturn. A total of 59 images was delivered to Southwest Research
Institute on Monday, with a select set of images displayed on JPL
monitors within an hour of generation of the data files. Cassini is
currently traveling at 28,330 kilometers per hour and is 284.662 million
kilometers from Saturn.

The B version of the C35 background sequence products have been
published to the Distributed Object Manager.  A preliminary Sequence
Integration & Validation Sequence Change Request meeting is scheduled
for next week.  SIRTF has requested DSN passes on 6 and 9 January 2003.
This will result in a change to the DSN allocation file for C35 but will
not impact Gravity Wave Experiment #2. The 29th session of the Cassini
Project Science Group (PSG) was held this week at JPL.  Representatives
from all instrument teams came to the lab to participate.

Mission Support and Services Office and Instrument Operations personnel
have completed testing of theVirtual Private Network (VPN).  The first
router with VPN hardware will be shipped to RPWS next week. Engineering
Change Requests for Cassini Information Management System 2.4 involving
Science Planning Attitude Spread Sheet implementation, Prime/Rider
instrument coordination, and Data Volume Calculation have been released
to the flight team for review and impact.

Software Requirement Certification Review meetings were held for RPWS
and Cosmic Dust Analyzer flight software builds.  Both have been
accepted for uplink in December. Mission Assurance presented a Risk
Management briefing to Principle Investigators who are at JPL attending
PSG meetings.  The talk covered an introduction to risk management, some
background on the Cassini process and several sample risk statements.
PIs have been tasked to identify risks relative to the health & safety
of their instruments, as well as any risks that would threaten their
instrument science or mission objectives.  This group will convene again
at the January 2003 PSG, to disposition and obtain concurrence on the
risks generated as a part of this exercise.

The Cassini Planetarium Show has delivered a script for review, and
signed on Robert Picardo to narrate.  Mr. Picardo is known to many as a
member of the cast from the Voyager television series.

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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