Cassini Significant Events 08/04/10 - 08/10/10
The most recent spacecraft telemetry was acquired on Aug. 10 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, Aug. 4 (DOY 216)
An encounter strategy meeting was held today to cover the period from
Aug. 13 to Sept. 24, which includes the Enceladus E11 and Titan T72
flybys, and maneuvers 260-262.
Thursday, Aug. 5 (DOY 217)
Today Uplink Operations (ULO) sent commands to the spacecraft for a
Radio Science (RSS) Low Gain Antenna test. The commands will execute on
August 15.
Friday, Aug. 6 (DOY 218)
Port 3 products were delivered Wednesday as part of the S64 Sequence
Implementation Process. Port 2 products for S65 are due today. The
products will be merged and sent out to the flight team for
review.
Saturday, Aug. 7 (DOY 219)
The command loss timer value was changed to 90 hours today in
preparation for the CDS version 10 flight software load.
Commands were uplinked today over DSS-63 for an Enceladus Live Inertial
Vector Propagator Update. ULO has verified that the files have been
received by the spacecraft, and will execute on Aug. 13.
Monday, Aug. 9 (DOY 221)
This week?s science events included the Cassini Plasma Spectrometer
being prime for pointing control for low latitude apoapsis observations
to give the Magnetospheric and Plasma Science (MAPS) teams measurements
of Saturn's outer magnetosphere and magnetosheath. RSS conducted a
high-gain antenna boresight calibration and CAPS performed an ion
calibration.
Tuesday, Aug. 10 (DOY 222)
The topic this week at the Mission Planning Forum was reconsideration
of the Cassini position regarding the 70m downtimes in 2013 and 2014
because of impacts to RSS activities. The extended down times are needed
to complete life extension maintenance and repairs to the 70m antennas.
At the time of the last negotiations, it was agreed that DSS-43 would be
down in 2013 and DSS-63 down in 2014. Members of the RSS team presented
their events schedule for these years and described the scientific
impacts to some RSS occultation experiments. It was noted, however, that
the alternative of swapping the timing of the maintenance activities had
impacts to some RSS Titan observations. Mission Planning showed an
overview of the logistical impacts of revising the current DSN schedule.
The decision of whether or not to reopen the matter with the DSN is
pending.
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