19 Oct 2001
(Source: Jet Propulsion Laboratory)
Cassini Weekly Significant Events for 10/11/01 - 10/17/01
The most recent spacecraft telemetry was acquired from the Goldstone tracking station on Sunday, October 14. 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, http://www.jpl.nasa.gov/cassini/english/where/.
Recent instrument activities include a Cosmic Dust Analyzer Flight Software normalization, an Instrument Expanded Block load for the beginning of an eight-day decontamination sequence for the Imaging Science Subsystem, and two Radio and Plasma Wave Science High Frequency Receiver calibrations. Engineering activities taking place onboard the spacecraft this week include an autonomous Command & Data Subsystem Solid State Recorder Memory Load Partition Repair and the final in a series of Attitude Control Subsystem deadband tests. A real-time command was uplinked to the spacecraft to turn on the Ka-Band Exciter and Ka-Band Traveling Wave Tube Assembly for testing as part of an upcoming Radio Science Data Flow test.
A Project Science Group meeting was held at JPL last week, which included members of the distributed science operations teams in addition to the JPL Cassini personnel. The Target Working Teams (TWTs) met all day Monday to continue the integration of their respective tour segments. Tuesday's plenary session focused on Project reports, ring dust models, and the Science Operations Plan implementation schedule. On Wednesday, the Discipline Working Groups (DWGs) held meetings to review the plans developed by the TWTs, Satellite Orbiter Science Team (SOST), and Titan Orbiter Science Team (TOST). During Thursday's plenary session, the DWGs, TOST, SOST, and the TWTs gave status reports on their progress, and the Principal Investigators and Team Leaders also made Instrument Team status reports. On Friday both the TOST and SOST met. TOST focused their discussion of finalizing the allocation of the period +/-30 minutes around Titan closest approach for Titan encounters A through 44. SOST discussed the results from the Surface Working Group meeting held Wednesday and preparation of the flybys needed to support the Science and Uplink Verification (SUPV) activity. Finally, after the last session on Friday, the Cassini project gathered to celebrate Cassini's fourth year in space.
The Mission Planning team led a review of the need to plan and model data carry-over on the Solid State Recorder (SSR) during tour, and the possible strategies for providing additional playbacks of certain science data sets. The discussion focused on impacts to the ongoing tour development process and the new SSR Management Tool (SMT). The decision was made to design the SMT to support data carry-over, since the science teams feel there can be significant science gains by allowing more flexibility in data play-back.
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 Mission to Saturn and Titan
Jet Propulsion Laboratory
California Institute of Technology
National Aeronautics and Space Administration