Untitled Document

Keck II Engineering Plan Details

Date: Wednesday 29 September 2004
Configuration: f/15 + tertiary
SEGMENT EXCHANGE RECOVERY
Segments Exchanged: SPs 25, 24, and 11
Segments Unwarped: SPs 25, 24, and 11
Reference Segment: SP 27

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, Barbara Schaefer, and Madeline Reed
will coordinate pre-sky work. On-sky work may begin shortly after sunset
during twilight. Barbara, Richard, and Madeline will run PCS from HQ for
the first part of the night, later handing over to Chuck on the summit.

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

****FOR TONIGHT, ONLY DO CPH1000 AND CPH100. SKIP CPH30****

2) T598 Combined secondary & primary alignment (Fine Screen) 0.5 hours
FSx1, FSx8
Even though we've just done several of these tests, tonight we want
to be sure the telescope is properly focused immediately before doing UFS
of the reference segment the first time. Try to do this at the same
elevation that you will do the first UFS tests.

3) T447, UFS of unwarped & exchanged ~1.5 hours
SP 25 (FOURTH ORDER FIT)
SP 24
SP 11
!!PLUS THE REFERENCE SEGMENT!!

NOTE: SP 27 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. Always work above 65 degrees elevation.

SPECIAL NOTES FOR T447 UFS:
1. Always take measurements above 65 degrees elevation.
2. For type 6 segments (SP19, 22, 25, 28, 31, 34, the outer point
segments) analyze using a 4th order Zernike fit. The default is 8th
order. THIS MUST BE CHANGED FROM THE BOX MENU ON THE GUI AS YOU BEGIN
THE TEST. Type 1 segments (the inner ring, SP1,2,3,4,5,6) also use a
4th order fit, but this is the default. All other segments use an 8th
order fit, also the default.

4) T358 Image Quality

5) T848 SSC Plate Scale Check
Use the following binaries (from /kroot/starlists/hill/eng.lis)
03368+0035 (6 and 8.9 magnitude)
03575-0110 (8.2 and 11.45 magnitude)
. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Date: Thursday 30 September 2004
Configuration: f/15 + tertiary
SEGMENT EXCHANGE RECOVERY
Segments Exchanged: SPs 26, 12, 29 (possibly 13)
Segments Unwarped: SPs 26, 12, 29 (possibly 13)
Segments Warped: SPs 25, 24, and 11
Reference Segment: SP 27

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, Barbara, and Madeline 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). Barbara, Richard, and Madeline will run PCS from HQ for
the first part of the night, later handing over to Chuck on the summit.

2) T447, UFS of segments unwarped & exchanged today 4-5 hours
SP 26
SP 23
SP 29
SP 13 (if exchanged today)
UFS of warped segments
SP 25 (FOURTH ORDER FIT)
SP 24
SP 11
!!PLUS THE REFERENCE SEGMENT!!

3) T358 Image Quality

4) T848 SSC Plate Scale Check (if not done last night)
Use the following binaries (from /kroot/starlists/hill/eng.lis)
03368+0035 (6 and 8.9 magnitude)
03575-0110 (8.2 and 11.45 magnitude).
. . . . . . . . . . . . . . . . . . . . . . . . . . .

Date: Friday, 1 October 2004
Configuration: f/15 + tertiary
Segments Warped: SPs 26, 23, 29, 13
Reference Segment: SP 27

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 segments warped today (and previously) ~2.0 hours
SP 26
SP 12
SP 29
SP 13 (if exchanged yesterday)

!!PLUS THE REFERENCE SEGMENT!!

4) T358 Image Quality

SECOND HALF OF THE NIGHT:
NIRC2 engineering as per David Le Mignant