Significant Event Report for Week Ending 1/21/2000

Cassini Significant Event Report

For Week Ending 01/21/00

The most recent spacecraft telemetry data was acquired from the Goldstone
tracking station on Wednesday, 01/19. The Cassini spacecraft is in an
excellent state of health and is operating normally. On Thursday 01/13
the Cruise18 sequence was radiated to the spacecraft and began nominal
execution on Sunday, 01/16. Activities this week include an AACS
Constraint Monitor update, SSR pointer reset, and Periodic Instrument
Maintenance. 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)

A number of technical interchange meetings occurred this week between
remote and visiting Probe Team members and the Spacecraft Office. Topics
included the Engineering Change Requests for Instrument Checkout 2 (ICO-2)
and the Probe Checkouts.

Version 24.6 DOM testing has been completed with no significant issues
identified. The Operational Readiness Assessment meeting is currently
scheduled for 1/25. Version D7 of the Mission Sequence Subsystem was
delivered this week. This software will be used in the development of the
Cruise 19 sequence.

The final Change Control Board for ICO-2 met Wednesday, 1/19. Of the 30
requests for activities, 27 have been approved with three pending
resolution of some open issues.

The final corrections have been made to the Saturn Educator Guide. This
publication will go to press next week.

The Cassini Project Science Group will assemble at JPL next week. Meetings
will be held from 01/24-01/28 and include a Jupiter Workshop to continue
integration of the Jupiter Science Plan, Discipline Working Group (DWG)
meetings to discuss the issues associated with the TOST and Jupiter plans,
a Cassini Science Planning Design Workshop to discuss the process used to
develop the Science plans for Tour, and a Titan Orbiter Science Team (TOST)
report. The first Surfaces Orbiter Science Team (SOST) meeting will begin
discussing the science plans for the icy satellite targeted flybys.

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.

Media Relations Office

Jet Propulsion Laboratory

California Institute of
Technology

National Aeronautics and Space
Administration

Pasadena, Calif. 91109.
Telephone (818) 354-5011