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COS Monthly Status Review

David SoderblomDavid Soderblom

STScISTScI

2007-07-172007-07-17

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STScI COS NewsSTScI COS News

• TAGFLASH:• This mode (TIME-TAG with regular comparison lamp exposures) was

added to deal with OSM drifts• Timing analysis showed that all lamp exposures were starting slightly late

(1 to 2 sec)• First flash about 2 sec late; others about 1 sec• Initial time pad in commanding too large by ~1 sec; now reduced• Latency in lamp turn-on is source of remaining delays; flash durations to be

increased to compensate• Full analysis of drift from TV2 to be completed in fall; present estimate of

S/N looks OK

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STScI COS NewsSTScI COS News

• Exposure Time Calculator (ETC):• Spectroscopic ETC is complete, but testing showed need for change (double precision in bin

sizes needed, depending on platform)• Acquisition and imaging ETC in progress, to be tested soon• Will coordinate testing and verification with IDT

• Bright Object Protection checks:• APT now includes access to Galex information• Final check of this in APT requires ETC completion to check count rates

• Documents:• First draft of COS Instrument Handbook in revision• Second draft to be ready July 23• IDT review of second draft requested• Released with CP in December

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STScI COS NewsSTScI COS News

• STScI-IDT SMOV Coordination:• SMOV Requirements Review held at GSFC in March• STScI is reviewing SMOV4 requirements; will prepare list of candidate activities• STScI COS effort led by Tony Keyes• COS IDT lead at STScI is David Sahnow• Expectation is 50/50 split of SMOV responsibility between STScI and IDT• Summary of activities to be prepared in August• GSFC activity summary review scheduled for mid-October

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7 AugSM4 Launch

21 MarRequirements

Review by HSTP

Receptionarea

Receptionarea

Proposal Descriptions

COS SMOV4 Activity Timeline

1 March2007

1 September2007

1 September2008

2007 2008

31 JanHigh Priority

(alignments, etc) Phase II Due

Apr-SepActivity

Summary (Phase I)

preparationSTScI/IDT

1 AugReserved

Target List Due (GTO)

31 MarERO and

Balance of SMOV Phase II Due

30 JunGTO Phase II

Due

25 OctActivity Summary Review by HSTP

1 March2008