COS SMOV Morning Update
31 July 2009
This presentation contains material that is embargoed until after the SM4
ERO press conference. Images/spectra of external (astronomical) objects
may not be altered, distributed, reproduced, published, displayed, or used in
any other way without the consent of the STScI Director or the HST Project.
Agenda
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•
•
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Recent Activity
SMOV Program Status
Recent Results and Analysis
Upcoming Ops Requests
Upcoming Uplinks
– For USE OFFSET (genslew)
• Upcoming COS SMOV Timeline
Recent Activity
• Tues 28 July (Day 209):
– 11474 visit 01-03 (NUV External Wavecals – sets 1-3 of 4)
• Wed 29 July (Day 210):
– 11474 visit 74 (NUV External Wavecals – set 4 of 4)
• Thurs 30 July (Day 211):
– 11478 visits 31-36 (NUV Internal Flats)
COS SMOV Status
Activity
PropID
Title
Visits Done
Total Visits
COS02
11353
Memory Check
PI
Welty
1
1
Status
Done
COS03
11354
Science Data Buffer Check
Welty
14
14
Done
COS04
11355
NUV Initial On-Orbit Turn-On
Welty
9
9
Done
COS07
11355, v5
NUV Fold Test
Welty
N/A
Done
COS23
11356
FUV Initial On-Orbit Turn-On
Welty
13
13
Done
COS06
11467
NUV Functional Test
Sahnow
1
1
Done
COS10
11470
NUV Internal Wavelength
Keyes
4
4
Done
COS27
11485
FUV Internal Wavelength Scale
Keyes
1
1
Analysis
COS10/COS27
11496
Lamp2/GET
Keyes
3
3
Done
COS05
11466
NUV Darks
Sahnow
17
20
Analysis
COS18
11478
NUV Flats
Ake
30
36
Analysis
COS08
11468
COS to FGS Alignment
Hartig
6
6
Done
COS09
11469
NUV Optics Alignment and Focus
Hartig
14
14
Done
COS11
11471
NUV Imaging Target Acquisition
Soderblum
0
8
Analysis
COS12
11472
NUV Dispersed Light TA
Soderblum
0
4
Analysis
COS13
11473
NUV Imaging Performance
Goodfrooij
0
4
COS24
11482
FUV Darks
Sahnow
18
20
COS25
11483
FUV Functional Test
Sahnow
1
1
Done
COS19
11479
NUV Sensitivity
Massa
1
5
Analysis
COS21
11481
NUV High S/N Verification
Sahnow
0
2
COS26
11484
FUV Optics Alignment and Focus
Hartig
16
16
COS28
11486
FUV Dispersed Light TA
Soderblum
0
5
COS33
11491
FUV Ext Flats
Sahnow
0
2
COS34
11492
FUV Sensitivity
Keyes
1
7
COS36
11494
FUV High S/N Verification
Sahnow
0
2
COS30
11488
FUV Internal Wavelength Verf.
Keyes
0
3
COS31
11489
FUV Spectroscopic Performance I
Friedman
0
3
COS14
11474
NUV Int/Ext Wavelength Scales
Keyes
2
6
COS15
11475
NUV Internal Wavelength Verf.
Keyes
0
4
COS16
11476
NUV Spectroscopic Performance I
Ghavamian
0
3
COS29
11487
FUV Int/Ext Wavelength Scales
Keyes
1
6
COS17
11477
NUV Spectroscopic Performance II
Ghavamian
0
3
COS20
11480
NUV Struc. & Thermal Stability
Smith
0
3
COS32
11490
FUV Spectroscopic Performance II
Ghavamian
0
2
COS35
11493
FUV Struc. & Thermal Stability
Smith
0
2
Analysis
Done
Analysis
Analysis
Analysis
Analysis
Embargoed figure - Do not distribute
Analysis: NUV Deuterium Lamp Flats
• NUV Flat Field Exposures
•
~18 hours accumulated on-orbit run time so far, at HIGH current
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–
34 30-minute exposures plus 4 <5-minute exposures all at HIGH current
Most occur in groupings of 6-8 exposures
• 20-25% degradation of signal to date
• Some indication that degradation is made worse by isolated
exposures, but this must be examined more carefully
Wavelength Calibration Analysis
•
11485/11496/11487: FUV WCA/PSA Wavelength Ranges
•
G140L 1230 FP-POS=4 Segment B Zero-order on detector
•
– WCA wavelength ranges recorded on detector have been evaluated for all FUV
grating central wavelength settings; initial subset of PSA ranges evaluated
– Analysis of all segments determined that all central wavelength settings place
scientifically required wavelength ranges on detector
• Ops request NOT required to support full suite of external PSA
observations in 11487 visits 01, 73 on Friday; GSFC notified
– For SMOV purposes we will NOT change encoder positions for G140L 1230
– Recommendation for cycle 17 science will be made after further analysis of the
impacts of options
• presently the leading option is to restrict usage of SEGMENT B for FP-POS=4
11474: NUV External Wavecals (Visits 01-03 and 74)
– Evaluate PSA / WCA ranges in conjunction with 11470 internals after initial
encoder position update
– >60 central wavelength settings to be reviewed
– Initial analysis indicates all regions nominal; continuing evaluation to consider
possible detailed refinements
• If necessary, an ops request will be generated to support uplink of required
encoder position updates to support observations beginning at 216:19:09:11
(Tues afternoon).
• Required information would be available by Monday morning
Additional Recent Activity
• 11474: NUV External Wavecals (Visits 01) Data Overflow
– G285M 3057 exposure; B-T=80, exp time=120
– Target count rate higher than implied by 80-sec BUFFER-TIME
– Part of planned test of TIME-TAG operation at high (for TIME-TAG)
count rate
• Overflow data is lost
• No impact to instrument
• No impact to test or analysis
Upcoming Uplinks (Ops Requests)
• Day 215: Mon 3 August (not yet submitted)
– Ops request for possible OSM2 encoder position adjustments
• will be submitted on Monday morning, if necessary
• Required for use in program 11475 visits 04 on Tues afternoon:
216:19:09:11
Upcoming Uplinks (for genslew)
• Day 212: Fri 31 July (submitted)
– USE OFFSET 11487A for 11487 visit 1 (executes Fri morning)
– USE OFFSET 11487Z for 11487 visit 73 (executes Fri evening)
• 215 SMS:
– None planned due to implementation of SIAF update
– Some upcoming visits have contingency update opportunities
** ALL of the above USE OFFSETS will use same (V2,V3) offset **
Upcoming COS SMOV Timeline
• 1147101 215:07:54:34 - 215:10:23:57
– Imaging Acquisition verification
• 1147405 216:19:09:11 - 216:19:32:44
– NUV Internal Wavecal Final Verification (uplink placeholder
opportunity)
• 1147504 216:21:30:00 - 217:00:56:57
•
NUV Internal Wavecal Final Verification