UVIS TEAM MEETING
OPERATIONS UPDATE
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
1
Instrument Status
• On/Off Cycle: 28.
– None since last meeting.
• Hours On: ~94,500 hours.
– Longest continuous operations: 9/11/2007 – 11/1/2010.
• HDAC Filament Modulation:
–
–
–
–
Filament 1: 141.28 hours (H cell), 117.28 (D cell).
Filament 2: 12.22 hours both H cell and D cell
Last: In S68 during T77 (H cell and D cell).
Next: In S70 during T78 (H cell and D cell).
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
2
Significant Data Issues
S66
UVIS_145SA_COMPSIT006_CIRS
Data return: 56% - DSS14
problem
S67
UVIS_146SA_EUVFUV003_PRIME
Data return: 72% - Station
problem
S68
No significant data issue except for some
IPHSURVEY
As of last week
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
3
First Time Events
• No First Time Event
• Upcoming: The XXM opmode starting S71.
– UVIS opmode are now
•
•
•
•
•
06/27/11
OFF
SLEEP (6.6 W)
DOWNLINK (new, 7.1 W)
NO_HDAC (new, 9.4 W)
ON (14.6 W)
UVIS TEAM MEETING OPERATIONS UPDATE
4
Rbot: Workload Impact
• The impact of Rbot on the ops team
workload is highly variable:
– S68: 0 out of 10 designs
– S69: 1 out of 14 designs
– S70: 0 out of 19 designs
– S71: Don’t know yet.
• The up-front job done by SP and the
lowering of the keep-out values (to +/300 rpm starting S67) helps a lot.
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
5
Major Local Issues
• Uplink side: None
• Downlink side:
– Problem processing large files generated by
long (32 hours) system scans.
• We have a workaround
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
6
XM Data Utilization Summary
S64
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UVIS TEAM MEETING OPERATIONS UPDATE
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XM Data Utilization
Summary
S65
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UVIS TEAM MEETING OPERATIONS UPDATE
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Action Items from Last Meeting
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UVIS TEAM MEETING OPERATIONS UPDATE
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Action Item #1: E15 Setup
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UVIS TEAM MEETING OPERATIONS UPDATE
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Action Item #1: E15 Setup
• We have the same geometry in s69 doy
213 (Rhea occultation)
– First taking one full detector image
– Then taking data with best guess 2 6pixels window around the stars
– Data should on the ground doy 214 late or
doy 217 early am.
– S70 IEBs are due doy 217 – Gives us an
opportunity to tweak the setup.
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
11
Action Item #2: Spectral
Resolution in Aurora Scan
• Issue: The spectral binning is 32 when
we scan for UVIS (rate is 0.06 mllrd/s.
Integration time is 8 sec. Wayne wants
no spatial binning)
• If the Z axis is perpendicular to the
equator (scan W-E) we generally can
limit the spatial window to cover the +/55 deg lat to limb region.
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
12
Action Item #2: Spectral
Resolution in Aurora Scan
• If the Z axis is parallel to the equator
(scan N-S) it is generally not possible to
reduce the spatial window size unless
we design the pointing with multiple
overlapping scans.
– More complex design
– Issue with scan duration
– We have not try that yet.
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
13
Action Item #3: HSP
maintenance
• At Bill’s request we are now turning on
the HSP HVPS for 24 hours every 3
months or so (if dark sky pointing
available)
– S67 – doy 113
– S68 - doy 182
– S69 - doy 240
– S70 - scheduled for doy 318
06/27/11
UVIS TEAM MEETING OPERATIONS UPDATE
14
Notes and Reminders
• Use UVIS_SOLAR_OFF to Sun in CIMS for all solar
occultation instead of ISS_NAC to Sun (-20.0, 0.0, -0.11
deg) offset.
• Before requesting sponge bits let us know what you want as
we may have a good understanding of instrument SSR
loading.
• The list of ring occultations that contain an atmospheric
occultation is on the team web site at
http://lasp.colorado.edu/cassini/team-site/archive/docs/pdf/Atmospheric_Occ.pdf
• The list of all the tour calibrations is on the team web site at
http://lasp.colorado.edu/cassini/team-site/archive/docs/pdf/UVIS_Tour_Calibration.pdf
• The UVIS PEFs are on the team web site at
http://lasp.colorado.edu/cassini/team-site/operations_planning/planning_info/
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UVIS TEAM MEETING OPERATIONS UPDATE
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