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Cassini Significant Events 01/19/11 - 01/25/11 The most recent spacecraft telemetry was acquired on Jan. 25
from the Deep Space Network tracking complex at Canberra, Australia. The
Cassini spacecraft is in an excellent state of health and all subsystems are
operating normally. Information on the present position and speed of the
Cassini spacecraft may be found on the "Present Position" page at: http://saturn.jpl.nasa.gov/mission/presentposition/. Thursday, Jan. 20 (DOY 020) A feature story called "Cassini Top Images of
2010" is available on the Cassini web site. It showcases the Cassini
scientists’ picks of the top images from 2010 with many close-up views of
Saturn and its environs. With its spectacular rings and dozens of odd moons,
the Saturn system reveals inspiring vistas from the vantage point of
Cassini’s cameras. For images and more information on this subject, link
to: http://saturn.jpl.nasa.gov/news/cassinifeatures/feature20110120/.
Friday, Jan. 21 (DOY 021) A Y-thruster calibration was performed today in order to
assess the performance of the B-branch Y-thrusters. The Navigation team is
evaluating the results and analysis of the data is underway. Saturday, Jan. 22 (DOY 022) In this week’s science observations, the Cosmic Dust
Analyzer (CDA) completed a 45-hour interstellar dust observation. The Composite
Infrared Spectrometer (CIRS) completed a 23 hour mid-infrared map to determine
Saturn's upper troposphere and tropopause temperature. Imaging Science (ISS)
observed the transit of Rhea across Dione for orbit determination purposes,
performed another observation in its Satellite Orbit Campaign, and completed a
17-hour observation of the outer irregular moon Ijiraq, just 12 kilometers in
diameter. ISS, CIRS and the Visual and Infrared Mapping Spectrometer (VIMS)
performed another observation in the Titan campaign to monitor surface and
atmosphere changes, after which ISS performed astrometric observations of
Saturn's small, inner moons Polydeuces, Telesto, Janus, Pallene, Atlas,
Calypso, and Methone. VIMS and CIRS completed a 16-hour observation of the E
and G rings. CDA completed another 44-hour interstellar dust observation, and
after the downlink of all recorded data to a Canberra 34m antenna, CDA began
yet another 37-hour interstellar dust observation. Sunday, Jan. 23 (DOY 023) The ISS Wide Angle Camera (WAC) experienced a machine error
today. The camera recovered nominally and no data was lost. This error was
added to Incident Surprise Anomaly (ISA) #43413. Monday, Jan. 24 (DOY 024) An article called “Cassini Top 10 Science Highlights
– 2010” was posted on the Cassini web site today. Even after over
six years of close study by the Cassini spacecraft, new scientific discoveries
continue to be made. For images and more information on this subject, link to: http://saturn.jpl.nasa.gov/news/cassinifeatures/feature20110124/.
A week-long series of presentations and discussions at the
53rd meeting of the Cassini Project Science Group (PSG) begins today. The
meeting objective is to report and discuss science results in the fields of Saturn
magnetosphere, icy satellites, Titan, rings and Saturn, and to assess how the
transition to the Solstice Mission is working. Tuesday, Jan. 25 (DOY 025) Files were uplinked to the spacecraft today in support of
S66 for the Live Inertial Vector Propagator (IVP) Update, and the CDA threshold
settings planned for execution on DOY 030 – 031. The Downlink Ground System (DGS) team’s Perimeter
Access Request (PAR) for the Java Distributed Object Manager (DOM) transition
was approved and is now in the Implementation Cycle phase in the process. The
DGS team provided Java DOM training and demonstrations during the Project
Science Group (PSG) meeting this week. ------------------------ To unsubscribe from Cassini Spacecraft Updates or to
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