**************************************** SSC Meeting Minutes: 2001/07/13, Waimea **************************************** Present: Miller, Djorgovski, Mumma, Bolte, Steidel, Chaffee, Nelson, Luppino, Ellis, Taylor, Quirrenbach, McLean (phone); Guests (via phone): Sandy Faber, Dave Cowley, James Larkin * Announcements . Jim Beletic arranged for additional tradeups with Marconi and we have three excellent devices with very good throughout to 320nm. Two will go into the LRIS-B dewar upgrade and the third is reserved as a spare or as the blue half of a HIRES upgrade. . Jim B. suggests that we pull our wafers for the underway 2k x 4k MBE devices at MIT/LL and run them in parallel (with the third lot. . Science with Keck 2001: Date is October 13, 2001 at CIT. Will check with Lynne Hillenbrand and Mike Jura for organizers. May have a two day meeting. Should include a presentation on the Keck 10-year plan and an update of the interferometry status. * NASA Archive (Jim Beletic) .NASA wants to archive the Interferometry data and possibly all the data taken during NASA time. They would like to start with HIRES. - get started Fall 2001 - working October 2002 CARA request to NASA to make it happen: FY02 3FTE + $200k FY03 and beyond 3FTE + $100k NASA proposal: FY02 $700k FY03+ $600k .This a chance here to use the NASA resources to jump-start a CARA general archiving effort. We need to spend some time thinking about what the archive should contain and what requirements it will put on observations and the Observatory. * DEIMOS report (Faber/Cowley on the phone) - 2 month slip since Jan 01 plus 1 month slip since the last full report in October 2000. An additional 1m slip is projected since the work will now extend into the Thanskgiving/Christmas holidays. - critical path: software, carriage rail system added to task list - August 1, 2001 first full-system testing - Current preship: September 13, 2001 - First-light, 26 Feb, 2002 - After some fixes to the slider#3 clamping mechanism, end-to-end flexure looks like 12 pixels (peak-to-peak) in both coordinates. (well within the flexure compensation system). The project feels that some of the components are moving in a way that compensates. For example, there is concern that the inferred flexure in a camera element is canceling flexure in the assembly holding the CCD. If the camera flexure is fixed, will the end-to-end flexure increase? -The slit-mask system had 700 successful insertions (failed when the barcode was rubbed off and clogged the system). - Rotator working within spec - Carefully weighing gives <19,000lbs - Track-trolley system now being built and tested at Lick * OSIRIS (Taylor) . A summary of the PDR was given by Committee Chair Keith Taylor. The PDR presentations were in general very positively received. and on a number of fronts the instrument is well developed. Taylor commented that although it is a challenging instrument, it is also relatively simple with few mechanisms and moving parts. . The team needs to order some long-leadtime components soon if the project is to continue. In particular the detector and TMA optics. These are both expensive (see fuller discussion of the budget in the executive session minutes). . Although the PDR overall was very impressive, the discussion centered around a few issues: - The data reduction will be complicated and to some extent the science goals depend in detail on the detector performance (charge diffusion) and crosstalk between adjacent spectra in the camera focal plane. There was a long discussion about the science capability compared to NIRC2 or NIRSPEC behind AO and it was concluded that a realistic end-to-end modeling of spectra is required to evaluate the science case. - There is no project manager - (related to above) there was no detailed work-breakdown structure - There are few descope options - The budget ($4.3M) may be less susceptible to growth during the project as a large fraction of of it in hardware or fixed-price contracts. . The PDR committee recommended a `mini-review' before a pass/fail decision is made for OSIRIS. The topics of the mini-review (in order of importance) are: **improved modeling of spectra and evaluation of the science case in more detail and specifically comparing with other AO spectroscopic capabilities The spectra modeling should include realistic detector properties and the effects of cross-talk/scattered light from bright night-sky emission **Options for adding a part-time project manager (different than the PI) should be explored **a work breakdown structure should be produced. The mini-review would be presented to the SSC, if possible at the October 2001 meeting. .it was widely agreed that the PDR was very well run by the committee (Chair: K. Taylor, J. Miller Dick Joyce (NOAO), James Graham, Hilton Lewis, David Sprayberry, Peter Wizinowich) *Keck Observatory presentation (Chaffee - see handout) a few highlights: .New building contract signed .NIRPSEC dewar window replacement scheduled for July .NIRC2 in the AO enclosure at K2, first light scheduled for July 29, 2001 ------------ . The Keck 10-year plan: we discussed the draft document on our 10-year plan; most of this discussion occurred in the executive session. We will need to have a final version of the 10-year plan ready for distribution to the newly-chartered Keck Observatory visiting committee by the October board meeting.