Instrument Requestor

PCS segment exchange recovery A. Contos/B. Schaefer

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Keck I Engineering Plan
Details

Date: Tuesday 8 July 2003
Configuration: f/15 + tertiary
SEGMENT EXCHANGE RECOVERY
Segments Exchanged: SPs 29, 13, and 4
Segments Unwarped: SPs 29, 13, and 4
Reference Segment: SP 21

1) T922, Realign optics after segment exchange 6.0 hours
This involves approximately 2 hours of work before going on the sky and about four hours after. The pre-sky work may begin as soon as the segment exchange is completed. Barbara Schaefer (with help from others) will be coordinating pre-sky and early on-sky work for Tuesday, 8 July. On-sky work may begin shortly after sunset during twilight.
(Barbara, Sergey Panteleev, and others interested will be doing the initial on-sky work early in the evening from Remote Ops I. PCS will be turned over to the summit crew after phasing.)
This tests includes stacking and phasing of the primary mirror (T598,T596)

2) T447, UFS of unwarped & exchanged SPs 29, 13, and 4 ~2 hours
!!PLUS THE REFERENCE SEGMENT!!

NOTE: SP 21 is the REFERENCE segment. Do the reference segment at the beginning, at the end, and after every three or so segments, being sure to do it before and after changing stars, if you must change stars.

SPs 29, 13, and 4 were unwarped and exchanged today.

3) T358 Segment and Telescope Image Quality ~0.5 hours
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Date: Wednesday 9 July 2003
Configuration: f/15 + tertiary
SEGMENT EXCHANGE RECOVERY
Segments Exchanged: SPs 31, 30, 14
Segments Unwarped: SPs 31, 30, 14
Segments Warped: SPs 29, 13, and 4
Reference Segment: SP 21

1) T922, Realign optics after segment exchange 6.0 hours
This involves approximately 2 hours of work before going on the sky and about four hours after. The pre-sky work may begin as soon as the segment exchange is completed. Barbara Schaefer will be coordinating the pre-sky recovery today. On-sky work may begin shortly after sunset during twilight.
This tests includes stacking and phasing of the primary mirror (T598,T596)

2) T447, UFS of unwarped & exchanged SPs 31, 30, 14 4-5 hours
UFS of warped segments SPs 29, 13, and 4
!!PLUS THE REFERENCE SEGMENT!!
NOTE: SP 21 is the REFERENCE segment. Do the reference segment at the beginning, at the end, and after every three or so segments, being sure to do it before and after changing stars, if you must change stars.

3) T358 Segment and Telescope Image Quality ~0.5 hours
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Date: Thursday, 19 June 2003
Configuration: f/15 + tertiary
Segments Warped: SPs 31, 30, 14
Reference Segment: SP 21

1) T598, FS N=1 twice. FS N=8 twice. 0.75 hours

2) T596, CPH 30 twice. Go back to CPH 100 if 1.0 hours
unable to capture on CPH 30.

3) T447, UFS of warped SPs 31, 30, 14 ~2.0 hours
!!PLUS THE REFERENCE SEGMENT!!
NOTE: SP 21 is the REFERENCE segment. Do the reference segment at the beginning, at the end, and after every three or so segments, being sure to do it before and after changing stars, if you must change stars.
These segments were warped today.

IF TIME PERMITS:
4) T358 Segment and Telescope Image Quality ~0.5 hours

SECOND HALF OF THE NIGHT: HIRES SCIENCE WITH GEOFF MARCY
Turn over at 10:30UT (12:30am HST) or earlier if tests are done.