1. UVIS TEAM MEETING OPERATIONS UPDATE 6/8/09 UVIS TEAM MEETING

2. Instrument Status On/Off Cycle: 27 Hours On: ~77,500 hours
No change since last meeting
Hours On: ~77,500 hours
Continuous operations since 9/11/2007
Longest continuous operations was from 1/15/2005 (probe relay) to 9/11/2007 (S/C safing)
HDAC Filament Modulation:
Filament 1: hours
Filament 2: hours
Last: 2006/255
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

3. AI from last meeting #1 Can we run HSP at 0.5 mlls? Closed (1/16/09)
The answer is NO:
As documented in logic design document.
As tested on the EM.
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

4. AI from last meeting #2 Off axis Titan occultation under RCS
Closed (1/27/09)
Unfortunately I put the offset on the wrong axis in my to Bob
Proposed pointing and instrument setup
UVIS_FUV to star with (-1.375, 0.0,0.0) offset
HDAC.ON=NO, HSP.ON=NO, FUV.ON=YES, FUV.COMP=SQRT9, FUV.INT=1.75, FUV.SLIT=OCCULT, FUV.N_OF_WIN=1, FUV.WIN1=1,1024,1,54,58,1, EUV.ON=YES, EUV.COMP=SQRT9, EUV.INT=5.0, EUV.OCCULT=CLOSE, EUV.SLIT=OCCULT, EUV.N_OF_WIN=1, EUV.WIN1=1,1024,1,55,59,1
We have a test of this configuration scheduled in S54
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

5. Significant Issues
S47
UVIS_102RI_ALPARAOCC001_VIMS UVIS_102RI_VENCUNMP001_CIRS
Data loss due to weather
S48
Sequence de-activated during thruster branch swap activity (071T02:10 to 077T03:05)
No data during this period
S49
UVIS_109TI_FIRNADCMP001_CIRS UVIS_110SW_IPHSURVEY002_RIDER UVIS_110EN_ICYATM00 & UVIS_110SW_IPHSURVEY003_RIDER
Data loss due DSS 14 red
S50
UVIS_110SA_MOS110APO003_PRIME
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

6. Titan Occultation under RCS
S49 (T53) UVIS_107ST_ALPERITI001_PRIME
0.5 mrd deadband
Tightening of the walking deadband
3 steps of .12 mrad
Max deviation is .86 mrd per axis.
First part (no shown) has star in/out of the slit
S50 (T56) UVIS_112ST_ETAUMATI001_PRINE
During transition from RCS
Not on the ground yet
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

7. RBOT Process UVIS Statistics:
S50: 5 out of 18
S51: 7 out of 21
S52: 0 out of 3
S53: 2 out of 3
The process is improving at each sequence.
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

8. Planning/Scheduling Notes
We are starting to flight sequences without a final DSN allocation.
Use UVIS_SOLAR_OFF to Sun in CIMS for all solar occulation (starting S54) instead of ISS_NAC to Sun (-20.0, 0.0, deg) offset.
The list of ring occultations that contain an atmospheric occulation is on the team web site at
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

9. Concerns
What do we have to do in order to still have a usable instrument in 2017?
HSP is degrading
The burn area in the FUV is getting deeper and wider
Turn off HVPS when FUV and EUV not in used for more than ??? hours?
Switch to the HI_RES slit if FUV and EUV not in used for more that ??? Hours?
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE

10. Ops team status for reminder of 09
Getting better now that KEPLER commissioning has concluded.
Still one instrument launch this year: EVE on SDO (November).
The launch of the TIM instrument on Glory has been delayed (2010, 2011?).
So we are breathing a little better.
EVE: EUV Variability Experiment - SDO: Solar Dynamic Observatory.
TIM: Total Irradiance Monitor.
6/8/09
UVIS TEAM MEETING
OPERATIONS UPDATE