UVIS TEAM MEETING
OPERATIONS UPDATE
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Instrument Status
• On/Off Cycle: 27
– No change since last meeting
• Hours On: ~81,750 hours
– Continuous operations since 9/11/2007
– Current longest continuous operations is from
1/15/2005 (probe relay) to 9/11/2007 (S/C safing)
• HDAC Filament Modulation:
–
–
–
–
01/05/10
Filament 1: 100.28 hours
Filament 2: 12.22 hours
Last: 2006/255
Next: H filament only 1/28/2010 (T66)
UVIS TEAM MEETING OPERATIONS
UPDATE
Significant Issues
S52 UVIS_116RI_BETPER001_ISS deleted
from the sequence by SP. Recovered via
mini-sequence but data volume taken from
UVIS_116ST_URALPVIR002_PRIME
ISA Z93945 – Need to
verify sequence prior to
implementation.
S55 UVIS_123SA_MOS122APO009_PRIME
Lost due to weather.
S55 UVIS_122SA_MOS122APO003_PRIME
UVIS_123SA_MOS122APO008_PRIME
Lot of drops. Data
ingested around the
major data drop periods.
S55 UVIS_123SA_MOS122APO007_PRIME
UVIS_123IC_ALPVIR001_PRIME
Lot of drops spread all
over. Be careful when
using these datasets.
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Significant Issues
• In S54 we refused to approve a waiver
of FR84B2 (UVIS boresight to sun flight
rule) without an analysis of the
occultation timing by the Nav team
– Seems to have raised the issue of margin
in Solar occultation to a higher level
– For this particular case the VIMS design
was modified to add 7 minutes of padding
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
First Time Events
• S54: First use of the UVIS_SOL_OFF
boresight for solar occultation
– T62 (2009-285)
UVIS_119SU_USUNOCC001/2_PRIME
• S60: First off-axis star occultation using the
FUV occultation slit
– T70 (2010-172)
UVIS_133ST_ALPVIRTI001_PRIME
– Set up tested in S54 (off by 1 pixel) and in S59
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Rbot Issues
• The AACS team solves the Rbot issues
by adding a rotation around the primary
pointing axis
– AACS used to give only an offset around Y
– UVIS has always requested an RA/DEC
equivalent for the secondary (mosaic)
• It took a while for AACS and UVIS to
understand each other
• We seem to be Ok now
– Which method to use depends on the
request as the results are different
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Rbot: Titan Mosaic Example
Original design.
AACS requested a
20 deg rotation.
RA/DEC equivalent
01/05/10
Simple rotation
UVIS TEAM MEETING OPERATIONS
UPDATE
Rotation with Z offset
compensation
Rbot: System Scan Example
Original Design
AACS requested a 20 deg
rotation
RA/DEC equivalent
Simple rotation
Note: Timing change
if rotation is large
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Rbot: Workload Impact
• The impact of Rbot on the ops team
workload is highly variable:
– S55: 1 request out of 18 had to be modified
– S56: 4 requests out of 11
– S57: 1 request out of 14
– S58: 9 requests out of 20
• 8 of the 9 requests used an “rbot-friendly”
secondary
– S59: 1 request out of 7
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Data Distribution Issue
• Licensing issue with Sybase
– Lab wide issue
– May have to switch DB provider
– Timeliness of data availability may be
affected for a while
– See Dave Judd presentation…
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
XXM Process (SIP)
XM
XXM
Change
Execution
5W
10W
+5W
Total Development
93d
78d
-15d
Pointing Designs (port 1)
~21d
13d
-8d
Pointing Designs (port 2)
10d
9d
-1d
Rbot analysis
22d
29d
+7d
Sequence Dev
43d
30d
-13d
• Prime/rider coordination and other science driven pointing
must be complete at the end of port 1
• The staffing profile and SIP probably cannot support XM
intensity science
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Templates?
• What are the characteristics of a template?
– #1 Same duration (or a multiple of… )
• Constant allocation for turn time
– #2 Pointing design independent of the viewing
geometry
– #3 Same SSR allocation
• #1 & #2: Re-use of a PDT template
• # 3: Re-use of an IEB
• Currently the nearest thing to a template we
use is the instrument calibration
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
By The Way….
• The calibration template is 3 hours long
and is used about once every 5 weeks
– You would expect that nobody would dare
temper with this template!
• In S55 it was changed to a 2 hours
segment and a 1 hour segment
– 2 + 1 is not equal to 3
• This is useless. If you cannot leave a
calibration request alone remove it!
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
What Can Help Our Workload
• We have not shown that we cannot
develop XXM sequences
• Pseudo templates do not help
– But guidelines that would take into account
the duration and geometry variations are
helpful
• Clean CIMS requests
– No rider request overlapping multiple prime
requests
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
What Can Help Our Workload
• Clean CIMS requests (con’t)
– Matching start time & duration between the
prime & the rider request
– Correct SSR allocation
• Make sure that what you are requesting
is feasible or has a chance to give
usable data
– FR84B2 violation
– Dust crossing period
• Don’t overreach
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Data Volume Reduction
• Spectral windowing
– See ISA Z86939
• Increase integration time (prime request)
• Spatial windowing (remove pixels outside
the target - for prime request only?)
• Remove HDAC (except for IPH survey)
• Targeted trigger (rider request)
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
Sequence Utilization Ratios: Prime Mission vs. Equinox Mission to Date
SEQ
CAPS
CDA
CIRS
INMS
ISS
MAG
MIMI
RADAR
RPWS
UVIS
VIMS
S37
0.97
0.91
0.82
0.98
0.81
0.93
0.84
0.35
0.93
0.89
0.79
S38
0.96
0.98
0.76
0.97
0.70
1.00
0.87
0.98
0.89
0.89
0.71
S39
0.56
1.00
0.75
0.98
0.78
1.00
0.89
0.99
0.93
0.87
0.77
S40
0.97
0.99
0.72
0.92
0.80
1.00
0.88
0.75
0.85
0.87
0.77
S41
0.96
0.89
0.78
0.98
0.79
0.80
0.93
0.00
0.87
0.81
0.72
Last 5 Seq. Avg.
0.88
0.95
0.77
0.97
0.78
0.95
0.88
0.61
0.89
0.87
0.75
SEQ
CAPS
CDA
CIRS
INMS
ISS
MAG
MIMI
RADAR
RPWS
UVIS
VIMS
S42
0.96
0.85
0.77
0.98
0.70
1.00
0.92
N/A
0.90
0.87
0.77
S43
0.96
0.98
0.71
0.90
0.78
1.00
0.90
N/A
0.90
0.88
0.81
S44
0.96
0.94
0.79
0.98
0.79
1.00
0.91
0.99
0.92
0.85
0.86
S45
0.95
0.89
0.73
0.98
0.77
1.00
0.91
1.00
0.91
0.87
0.81
S46
0.95
0.00
0.81
0.96
0.75
1.00
0.89
0.97
0.91
0.83
0.83
S47
0.95
0.00
0.72
0.98
0.69
1.00
0.91
0.99
0.93
0.86
0.76
S48
0.94
0.62
0.76
0.97
0.71
0.80
0.86
0.82
0.91
0.82
0.81
S49
0.92
1.00
0.77
0.97
0.64
0.97
0.87
0.69
0.91
0.89
0.67
S50
0.94
0.98
0.85
0.98
0.64
1.00
0.85
0.96
0.92
0.84
0.66
XM Average
0.95
0.70
0.77
0.97
0.72
0.97
0.89
0.92
0.91
0.86
0.78
Cassini Prime Mission Data Usage Summary (S01-S41)
700000.00
600000.00
500000.00
400000.00
Total Allocations
Total Unused Data
Mbits
Total Recorded
300000.00
Total Downlinked
200000.00
100000.00
0.00
CAPS
CDA
CIRS
INMS
ISS
MAG
MIMI
RADAR
RPWS
UVIS
VIMS
Cassini Equinox Mission Data Usage Summary (S42-S61)
Up-to-Date as of S50
140000.00
120000.00
100000.00
Total Allocations
80000.00
Total Unused Data
Mbits
Total Recorded
60000.00
Total Downlinked
40000.00
20000.00
0.00
CAPS CDA
CIRS INMS
ISS
MAG
MIMI RADARRPWS UVIS VIMS
IEB Generation Process
TOL/
CIMS
Assign IEB
number
Edit IEB
generation
script
Deassemble
load cmd
Verify
Inst. Setup
Generate
IEB load
Load
cmd
manual
automated
Three types of IEB:
• Pre-loaded:
• Commonly used instrument setup: already in the IEB generation script
• Tour Library:
• Less commonly used instrument setup: IEB script-ready & requires edition of
the IEB generation script
• Specific to a sequence:
• New or rarely used instrument setup: requires the development of an
instrument setup script & edition of the IEB generation script & validation
Trigger Generation Process
Merged
sequence
Extract
pointing
code
Trigger
file
Clean up
trigger
file
Run PDT
on each
prime
Merge
short form
files
Generate
trigger
file
manual
Generate
UVIS PEF
Generate
products
automated
Inst.
timing
Check
products
SSR
loading
The utilization of
pointing templates
does not help the
generation of the
trigger commands
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/
01/05/10
UVIS TEAM MEETING
OPERATIONS UPDATE
Concerns
• Is the HSP usage policy put in place
after last meeting working Ok?
– No more HSP HVPS ON at -03:00
– HSP HVPS ON only where useful.
• What do we have to do in order to have
usable FUV and EUV up to 2017?
01/05/10
UVIS TEAM MEETING
OPERATIONS UPDATE
ISA Z86939 Summary
From The 7/2005 Team
Meeting
01/05/10
UVIS TEAM MEETING OPERATIONS
UPDATE
FSW Status
• 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
– Affects all icylon in S11 and the first icylon in S12
• S12 IEB patched for Enceladus encounter
• S13 and S14 IEB updated
– Identification of the problem
• EUV.WIN1=14, 48, 1, 560, 1023, 2
• 16-pixel repeat pattern
24
UVIS TEAM MEETING 7/2005
ISA Z86939
25
UVIS TEAM MEETING 7/2005
ISA Z86939
26
UVIS TEAM MEETING 7/2005
ISA Z86939 (EM test)
• Compare the EUV and FUV indirection tables
– They are identical
• Test using a Hg lamp (FUV channel)
– Could not reproduce
27
UVIS TEAM MEETING 7/2005
ISA Z86939 (Hg lamp test)
Extracted from 14, 48, 1, 512, 1023, 2
14, 48, 1, 560, 1023, 2
Extracted from 0, 63, 1, 0, 1023, 1
28
UVIS TEAM MEETING 7/2005
ISA Z86939 (Hg lamp test)
14, 48, 1, 512, 1023, 2
14, 48, 1, 560, 1023, 2
0, 63, 1, 0, 1023, 1
29
UVIS TEAM MEETING 7/2005