From: Saul Perlmutter (saul@lbl.gov)
Date: Tue Jul 06 2004 - 18:28:41 PDT
Hi Adam,
Hmm... if the schedulers don't manage to get us back on the calendar
after the safe mode, the following may all be moot, but Rachel reminded
me that we should have a simple backup plan in case something goes wrong
with one of the observations. In particular she was concerned that a
couple of the tiles have to use guide stars that hadn't been tried
before, so they could fail. (And now, of course, it's possible that
they won't be able to fit all of our tiles on the remaining schedule.)
How about if we just say that if an observation of one team's tile(s)
fails then the other team will give the appropriate fraction of its
tiles (in this case we probably should use fractional tiles, quanitized
to the nearest quarter in chip row number) in some pre-agreed arbitrary
order?
Darn-- the dreaded safemode strikes again! --Saul
P.S. If that backup plan sounds good, here's an arbitrary order that
aims to keep the contiguity of each team's area: If observations fail
for the STScI team's "first-and-fourth-refusal" tile(s) then the SCP
team would give up the North quarter of tile 29 first, then the North
half, then the North 3/4, and so on, followed by the same partial-chip
order for tile 24, then tile 25, then tile 21. Conversely, if
observations fail for the SCP team's "first-and-fourth-refusal" tile(s)
then the STScI team would give up the South quarter of tile 28 first,
then the South half, then the South 3/4, and so on, followed by the same
partial-chip order for tile 27, then tile 31, then tile 32.
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