PCS segment exchange recovery A. Contos/B. Schaefer 2.5 nights

Image Quality, S. Panteleev 3hrs

Auto Acquisition, K. Summers 2hrs
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Keck I Engineering Plan
Details

Date: Wednesday 13 August 2003
Configuration: f/15 + tertiary
SEGMENT EXCHANGE RECOVERY
Segments Exchanged: SPs 32, 15, and 5
Segments Unwarped: SPs 32, 15, and 5
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. Richard Cohen and Barbara Schaefer will be coordinating pre-sky work for Wednesday, 13 August. On-sky work may begin shortly after sunset during twilight.

This test includes stacking and phasing of the primary mirror (T598,T596)

2) T447, UFS of unwarped & exchanged SPs 32, 15, and 5 ~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 32, 15, and 5 were unwarped and exchanged today.

3) T447, UFS of segments warped last month for stability tests
SPs 31, 30,14, 29, 13, 4 and reference segment as appropriate! ~3hours
Please save time for T358 at the end of the night.
Segments in this group that you do not get tonight may be done
tomorrow or the next night.

4) T358 Segment and Telescope Image Quality ~0.5 hours

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Date: Thursday 14 August 2003
Configuration: f/15 + tertiary
SEGMENT EXCHANGE RECOVERY
Segments Exchanged: SPs 34, 33, 16
Segments Unwarped: SPs 34, 33, 16
Segments Warped: SPs 32, 15, and 5
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. Richard Cohen will be coordinating the pre-sky recovery today. On-sky work may begin shortly after sunset during twilight.
This test includes stacking and phasing of the primary mirror (T598,T596)

2) T447, UFS of unwarped & exchanged SPs 34, 33, 16 4-5 hours
UFS of warped segments SPs 32, 15, and 5
!!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.
Also get any month-old warped segments that were not measured last night.
See above for SP numbers.

3) T358 Segment and Telescope Image Quality ~0.5 hours

4) If time permits: Auto-acquisition tests as per Kellee Summers.
(call Kellee about 1 hr before ready for her if it appears that
there will be at least 2.0 hours for her test, 883-8483 )

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Date: Friday, 15 August 2003
Configuration: f/15 + tertiary
Segments Warped: SPs 34, 33, 16
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 hour
unable to capture on CPH 30.

3) T447, UFS of warped SPs 34, 33, 16 ~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.

4) Low elevation phase. T967. 1.0 hour
Phase the telescope for upcoming low elevation science.

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

SECOND HALF OF THE NIGHT:
Optical quality tests per Sergey Panteleev, 3 hrs

• T 848 (please perform between 23:00 and 1 A.M Local time when the test stars are at a low airmass.
• T 362
• T 464