Cassini Significant Events 06/24/09 - 06/29/09
The most recent spacecraft telemetry was acquired on June 29 from the
Deep Space Network tracking complex at Goldstone, California. 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/.
Wednesday, June 24 (DOY 175):
Scientists working on Cassini have detected sodium salts in ice
grains of Saturn's outermost ring. Detecting salty ice indicates that
Saturn's moon Enceladus, which primarily replenishes the ring with
material from discharging jets, could harbor a reservoir of liquid water
perhaps an ocean -- beneath its surface. For the full details on this
story link to:
http://saturn.jpl.nasa.gov/news/newsreleases/newsrelease20090624/
All participating teams submitted files today for the first input
port of the S55 Science Operations Plan process.
Thursday, June 25 (DOY 176):
Imaging Science (ISS) and the Ultraviolet Imaging Spectrograph (UVIS)
jointly observed Enceladus¹ plume at intermediate phase, and ISS, UVIS
and VIMS observed Mimas.
Friday, June 26 (DOY 177):
Orbit Trim Maneuver (OTM) #203 was performed today. This is the
cleanup maneuver from the T57 encounter on 06/22. The main engine burn
began at
1:29 AM PDT. Telemetry immediately after the maneuver showed the burn
duration was 14.3 seconds, giving a delta-V of 2.4 m/s. All subsystems
reported nominal performance after the maneuver.
Monday, June 29 (DOY 180):
Part 2 of the S51 background sequence was radiated to the spacecraft
today over the Goldstone DSS-25 pass. It will begin execution on Tuesday,
July 7, and will conclude on July 23.
The Cassini Plasma Spectrometer led spacecraft pointing for a
Magnetosphere and Plasma Science campaign to observe dawn-side
magnetospheric boundaries at a variety of radial distances, then UVIS
began system mosaic scans of Saturn¹s magnetosphere in 8 hour time blocks
over seven non-consecutive days to observe atomic oxygen and
hydrogen.
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