Instrument Status
• On/Off Cycle: 26
• Hours On: ~60,000 hours
– Continuous operations since 1/15/2005 (probe relay)
• HDAC Filament Modulation:
– Filament 1: 100.28 hours
– Filament 2: 12.22 hours
– Last: 2006/255
UVIS TEAM MEETING 6/2007
1
FSW Status
• No Changes since last meeting
• Old ISA
– ISA Z70771
• Fixed by FSW patch in C24
• Fixed by FSW V1.3 starting C31
– ISA Z86939 (bad EUV data in S11 icylon)
• Probably FSW problem
• Workaround by updating the instrument setup
UVIS TEAM MEETING 6/2007
2
GSW Issues
• None since last meeting
UVIS TEAM MEETING 6/2007
3
Operational Issues
• None since last meeting
UVIS TEAM MEETING 6/2007
4
Planning/Sequencing Issues
• No DSN allocation until late in the
sequence development
• RBOT analysis
– JPL is trying to minimize the time the RW are
under 300 rpm
– Late pointing design modification
UVIS TEAM MEETING 6/2007
5
Data Corruption (ISA Z89728)
• First reported on 2006/336
• Caused by 1 to 4 faulty sub modules on SSR-A
• Consequences:
– Corrupted packet header (JPL and instruments can filter
that via ground processing) => data gap
– Corrupted science header => data gap
• Has caused the L0 processing software to crash
– Corrupted science data
• Impossible to filter during L0 processing
• Trying to query JPL database around time of data corruption
– Mostly but not always successful.
UVIS TEAM MEETING 6/2007
6
Data Corruption
• Working around the corrupted data
– Time consuming
• S31: SSR B is the prime SSR
– Corruption is less likely
• S35: New FSW
– Will be able to skip the corrupted SSR modules
UVIS TEAM MEETING 6/2007
7
Sun Occ Port
• Since S30 we are flying with the sun
occultation port in the open position
– Process in place to check if the Sun is “near”
the occulation port
• We are closing the Sun occultation port if neither
prime nor rider.
• What to do if prime or rider?
UVIS TEAM MEETING 6/2007
8