Status Report

Cassini Weekly Significant Events for 06/15/00 – 06/21/00

By SpaceRef Editor
June 23, 2000
Filed under

The most recent spacecraft telemetry was acquired from the Madrid tracking station on Wednesday, 06/21. The Cassini spacecraft is in an excellent state of health and is operating as expected.  The speed of the spacecraft can be viewed on the "Where is Cassini Now?" web page ( "" )
Maintenance of the Visual and Infrared Mapping Spectrometer (VIMS) instrument was accomplished by turning on the Infrared Optics
decontamination heaters for a 24 hour period following Trajectory Correction Maneuver-14.  Updated flight software and Instrument Expanded Blocks (IEBs) for the Cassini Plasma Spectrometer (CAPS) and VIMS instruments were loaded on board.  CAPS actuator and flight software checkouts  were performed.  VIMS dark frame collection, internal calibration, and flight software checkout were begun.  The Attitude and Articulation Control Subsystem (AACS) completed a reaction wheel unload.
Development for the Cruise 21 background sequence continues,  C21 is currently in the Sequence Integration and Validation (SI&V) phase.
A review of the Tour Phase requirements and design of the Spacecraft Office was conducted.  Feedback from the review board was positive.  This is the first of a series of requirements and design reviews at the Office and Team level to be conducted through September.
Mission Planning has begun the formal coordination of engineering and science activities in the Saturn Orbit Insertion (SOI) and Probe Relay critical sequences.
An Orbiter Science Operations Working Team (OSOWT) telecon was held to continue the science integration process for the Jupiter Subphase.  This telecon finalized the resolution of conflicts that existed in Phase F (Jupiter closest approach +15d to JCA +72d), and began the science integration process for the C25 portion of the Jupiter Subphase (JCA +72 days to JCA +120 days).
Version D7.2 of the Mission Sequence System (MSS) software was approved for delivery to operations. Installation has begun and will completed by the end of the week.  Major changes in this delivery include updates to the Pointing Design Tool, engineering and science sequence modules, the MSS Tool Launcher, and a number of flight rules.
The Cassini web site has been added to the space link directory on the Universe Today web site.  Universe Today provides space exploration and astronomy news in an overview format with links to sites where more detail may be found.  The goal of this site is to build a comprehensive directory of space links for educators, students, and space buffs.  The Cassini link may be found by going to  and clicking on
"Space Links."  After selecting "Missions", the Cassini Home Page can be selected from the alphabetical listing.
Representatives from the web site videotaped presentations made by Cassini Radio Science team members.  The URL is .
Cassini Outreach
Cassini Mission to Saturn and Titan
Jet Propulsion Laboratory
California Institute of Technology
National Aeronautics and Space Administration

SpaceRef staff editor.