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Cassini Significant Events
for 03/06/03 - 03/12/03

The most recent spacecraft telemetry was acquired from the Canberra
tracking  station on Wednesday, March 12. 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/operations/present-position.cfm .

Attitude Control Subsystem (ACS) Flight Software checkout continued 
this week with the following activities performed: inertial reference 
unit B checkout, memory readouts of both the prime and backup ACS 
flight computer, a dynamic constraint monitor table checkout, a 
geometric constraint monitor table checkout, star ID suspend 
demonstration with quiescent reaction wheel assembly, several high 
water mark clears, and fault protection log pointer resets. At the 
conclusion of activities, ACS status was nominal.  Data acquired from 
the various tests continues to be analyzed.

Port three for Science Operations Plan (SOP) implementation for tour
sequences S15/S16 occurred this week.  Development for these sequences
will conclude next week.

A subsequence generation sequence change request approval meeting was
held for the C37 sequence.

The Navigation Ancillary Information Facility (NAIF) released its
version N0055 Spacecraft, Planet, Instruments, C-matrix, and Events
kernels (SPICE) toolkit.  The toolkit will be delivered to the Project
Software Library within two weeks.  Installation of the executables on
workstations will follow.  This version includes two new C-wrapped
routines, and a corrected routine to support EKernel production.  It
also clarifies Cassini-specific RA, DEC, and Twist as well as yaw,
pitch, roll functions in the NAIF/SPICE documentation.

The Imaging Science Subsystem team has published an article in Science
magazine entitled "Cassini Imaging of Jupiter's Atmosphere, 
Satellites, and Rings". The URL is
http://www.sciencemag.org/cgi/content/full/299/5612/1541 .

More information may be obtained at 
http://www.msnbc.com/news/880835.asp .

QuickTime movies that illustrate Cassini's tour through the Saturnian
system from the viewpoint of an observer sitting on the spacecraft are
available at  http://solarsystem.dlr.de/PG/cassini/mission/orbit.shtml

Cassini project members participated in a Family Reading Night event 
at Verdugo Woodlands Elementary School in Glendale, California. Each 
reader gave two reading sessions. In addition, a tour of the solar 
system in slides was presented to the entire school.

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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