Status Report

NASA Cassini Significant Events for 11/06/03 – 11/12/03

By SpaceRef Editor
November 14, 2003
Filed under , ,
NASA Cassini Significant Events for 11/06/03 – 11/12/03

The most recent spacecraft telemetry was acquired from the Goldstone
tracking station on Wednesday, November 12. The Cassini spacecraft is in
an excellent state of health and is operating normally. Information on
the present position and speed of the Cassini spacecraft may be found
on the "Present Position" web page located at .

On-board activities this week included transition to Reaction Wheel
Control in preparation for Gravitational Wave Experiment (GWE) #3, ACS
X-Band body vector update, and biasing of the reaction wheels.

Instrument activities included a Radio and Plasma Wave Science (RPWS)
high frequency receiver calibration, Imaging Science Subsystem (ISS)
data compression check, Ultraviolet Imaging Spectrograph solar port
calibration and bright star observation, Composite InfraRed Spectrometer
flight software upload to the solid state recorder, Ion and Neutral Mass
Spectrometer power on – pressure test – memory dump and power off, and
an eight day RPWS Saturn orbit insertion instrument expanded block test.

As part of this week’s activities, ISS successfully acquired 100 star
images and 393 Saturn images. The Multi Mission Image Processing
Laboratory automated downlink subsystem processed and delivered these to
the ISS Science Team at SSI at a rate of 3 seconds/image.

The Radio Science Subsystem (RSS) Gravitational Wave Experiment (GWE) #3
started on the evening of November 9 over Goldstone’s DSS-25 station.
The experiment will continue for 20 days with continuous DSN support.
The spacecraft will remain on reaction wheel control for the duration of
the experiment. The Ka-band transmitter at DSS-25 has been restored to
operations, although at a lower output power, and without redundancy.
The DSN engineers are working towards returning it to the nominal 800
Watts in the future.

Development of the C42 background sequence is on track. The merged
products for the Preliminary Sequence Integration and Validation (PSIV)
cycle 1 phase have been released. As there have been no changes to the
DSN allocation file, and simulation of the sequence is not required, the
PSI&V Science Allocation Panel, Simulation Coordination, and Simulation
Procedure Review meetings were cancelled.

Preliminary port1 for the Science Operations Plan Implementation process
was reached for tour sequences S19 and S20, and preliminary port 2 for
S05 and S06.

Official ports were reached for two sequences as part of the Science
Planning Team process. C43 passed its third and final port with the
merged product currently being run through Kinematic Prediction Tool
(KPT)/ Inertial Vector Propagator (IVP). C44 reached its first official
port. The product was merged and delivered to ACS for KPT/IVP analysis.

A Project Software Monthly Management Review was held to review status
of Spacecraft Operations Office and Uplink Operations tools. Development
continues on schedule

A Delivery Coordination Meeting was held for Mission Planning’s version

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.

SpaceRef staff editor.