An added option for B3, though I wouldn't recommend it for Keck, is
to start with DK angles whose most-nearly-horizon-aligned value
is tilted by atan(1/9) = 6.34deg. This distributes a whole row of
detectors across what otherwise would be the gap between the
rows. Doesn't help much for the gap between tiles, and the ends
of the rows should get a bit of a jagged appearance, but the 0.125deg
EL offset would help with that part.
Keith.
On 4/14/15 3:46 PM, Clem Pryke wrote:
Hi Colin,
I think you were there today when we discussed the desire to do finer el steps
for B3 given the smaller beam size. Walt suggested interleaving cycles of
schedules offset by 0.125 deg which seems like a good solution - allows to bin
the data either way and makes for minimal change versus previous practice.
But it then occurred to me that we should do the same for Keck given that we
now have 220GHz receivers whose beam size is very similar to the B3 95GHz
beams.
Looks like we are right now coming to the end of the 2nd cycle of dk angles.
Please remind me what the length of the current sequence is. We should do the
next sequence with 0.125 deg offset in el.
Anyone who objects should chime in - I *think* this makes sense.
Best,
Clem
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Dr. Keith L. Thompson phone (US) 650-723-7901
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