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Cassini Update
Cassini Update
12 Oct 2001
(Source: Jet Propulsion Laboratory)

Cassini Weekly Significant Events for 10/04/01 - 10/10/01

The most recent spacecraft telemetry was acquired from the Goldstone tracking station on Sunday, October 7. The Cassini spacecraft is in an excellent state of health and is operating normally. Information on the spacecraft's position and speed can be viewed on the "Present Position" web page,

Recent instrument activities include the third in a series of Cosmic Dust Analyzer noise evaluations, the Visual and Infrared Mapping Spectrometer being placed in sleep mode, two Radio and Plasma Wave Science (RPWS) High Frequency Receiver calibrations and an RPWS Periodic Instrument Maintenance activity. Engineering activities taking place onboard the spacecraft this week include an autonomous Command & Data Subsystem Solid State Recorder Memory Load Partition Repair and further Attitude Control Subsystem (ACS) deadband testing, which will provide more data for a trade study on hydrazine consumption for two different Reaction Control Subsystem deadband settings.

Sequence development for C29 is proceeding on schedule. The Sequence Team Preliminary Sequence Integration and Validation phase continued with two meetings held last week to review simulation coordination and preliminary sequence change requests. The Huygens Probe team has submitted inputs for the Probe Relay test in C29 and the corresponding minisequences are now in development.

The Project Science Group (PSG) met this week at JPL. Principal items of discussion were Discipline working group activities, Target Working Team status and progress, and Saturn dust models. In addition to the PSG science planning work, Cassini JPL personnel are using this opportunity to meet with the PSG science teams to work out various scheduling and support issues.

The Instrument Operations team coordinated with several other groups to provide training to Program personnel this week, especially for out-of-town science team members who were present for the PSG meetings anyway. Tutorials on the Planetary Data System and Events Kernel were held, and the Spacecraft Operations Office (SCO) supported an overview of the ACS. The Uplink Operations (ULO) office also completed the week-long workshop for users of the newest versions of the Pointing Design Tool and Science Opportunity Analyzer software.

ULO hosted a third meeting on Mission Sequence Subsystem (MSS) D8 priorities, with good support from SCO, Mission Support & Services Office (MSSO), and Science Planning. Significant progress has been made in defining the user needs and associated work to meet those needs.

System Engineering and MSSO examined how to best distribute science-planning tools to the science team Co-Investigators. Various options have been discussed with some of the science teams, and the comments from that discussion are being integrated into an overall plan.

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.

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Cassini Mission to Saturn and Titan
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Last Updated: 12 Oct 2001