29 Jun 2001
(Source: Jet Propulsion Laboratory)
Cassini Weekly Significant Events for 06/21/01 - 06/26/01
The most recent spacecraft telemetry was acquired from the Madrid tracking station on Wednesday, June 27. 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 spacecraft activities included a Radio and Plasma Wave Science (RPWS) high frequency receiver calibration and an automatic repair of solid state recorder B. An additional test of the Huygens Probe B-chain S-band carrier signal was performed this week; Huygens personnel are currently analyzing the data returned from this activity. The Visual and Infrared Mapping Spectrometer (VIMS) was powered on and initialized with flight software and an Instrument Expanded Block (IEB) load in preparation for the start of the C27 background sequence. Additionally, a minisequence was uplinked to provide a revised IEB load for the Imaging Science Subsystem (ISS) in preparation for its next observation.
The Cassini Project Science Group (PSG) meeting was held in Oxford, England. The PSG endorsed a scenario which permits full retrieval of Huygens Probe data. The details of this scenario, which includes a Titan flyby at 50,00 to 70,000 km for probe release, will be worked in the coming months. Cassini science teams presented science results from the Jupiter flyby in December of last year. Plans are under way for publication of these results in scientific journals. Saturn planning was a key focus of the meeting. Highlights included discussions of the first 10 Titan flybys and numerous icy satellite flybys, and the formation of Target Working Teams. These teams will address more detailed tour issues such as synergistic observation strategies, data volume, and other aspects of planning that are needed for the development of the Science Operations Plan. Additionally, personnel from the Uplink Operations Team provided the PSG with an overview and led a discussion on science planning tools.
The C27 Sequence Virtual Team worked with Integration Test Laboratory personnel to perform a system test of instrument muting capabilities in support of the C27 Huygens Probe mute test. All results were nominal.
The Spacecraft Operations Office began a series of meetings to update the Main Engine Trajectory Correction Maneuver block for TCM-18 and for Tour.
A dedicated test network has been implemented by the Mission Support & Services Office which allows testers and system administrators to troubleshoot problems, test new software installations, and monitor performance.
A series of five student workshops on Cassini were given in workshops co-sponsored by Sandia National Laboratory and Los Alamos National Laboratory. A public lecture was also given at the Bradbury Science Museum in Los Alamos. This outreach activity was targeted at students throughout the state of New Mexico.
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