Date: Fri, 29 Dec 2023 14:04:48 -0700
Subject: Re: [sloan-25mlog 6981] 2.5m obslog 20231228 (SJD 60307)
From: "Audrey Oravetz"
> Hi Kaike and Audrey,
>
> I think two GFA’s less than 1.4 fwhm and airmass less than 1.2 will be
> good limits with the seeing monitor offline.
>
> Let's say a minimum of 1 clear star (peak counts between 5000-50000) in
> each GFA if the galactic plane has set.  Generally I think pointing as
> close as you can to the plane (away from the galactic pole) might help.
>
> You can also inspect the GFA images during any science fields and if they
> meet the criteria above then you can move right into the focus sweeps as
> long as the field isn’t setting and the weather is ok.
>
> Maybe that will help?
Understood. Yes, that helps. Thank you.
Audrey
>
> Conor
>
>> On Dec 29, 2023, at 7:29 AM, Kaike  wrote:
>>
>>
>>
>>> On Dec 29, 2023, at 6:15 AM, asimmons@apo.nmsu.edu wrote:
>>>
>>>
>>>                      APACHE POINT OBSERVATORY SDSS 2.5M
>>>
>>>                                OBSERVING LOG
>>>                         Thursday December 28, 2023
>>>
>>>                                 (SJD 60307)
>>>
>>> ----  Observing Team ----
>>>
>>> Audrey Oravetz
>>>
>>>
>>> ---- Observing Plan ----
>>>
>>> Thu 28 Dec 2023 60307 0.95 01:03 01:18 12:51 00:44 12:19 --- bright
>>> (11.8 h, w/ 0.3 h for 12 deg design)
>>>
>>>
>>> ---- Observing Summary ----
>>>
>>> Partly cloudy for the first few hours but mostly clear after that. The
>>> seeing was variable at times.
>>>
>>> The galactic plane dropped to too low of altitude when the seeing
>>> reached 1.5 to allow the switch to Conor's tests, and subsequent APOGEE
>>> fields did not have all 6 GFAs solved with astrometry.net to allow for
>>> the tests either. Let’s hope that the conditions are favorable at the
>>> start of tomorrow night instead.
>>>
>>> Note that it is difficult to know when to actually switch from queue
>>> observing to the tests because many of the bright designs are scheduled
>>> at lower altitudes, which makes it difficult to reach the >> criteria and currently the APO cyclops seeing monitor is not working to
>>> provide us with accurate seeing measurements at zenith. We will just
>>> continue to provide our best judgement.
>>>
>>
>> If seeing is stable and measured  FWHMs from at least two GFAs are > 1.4”, let’s switch to Conor’s tests.
>>
>> Conor, could you please chime in if you feel differently.
>>
>>
>>>
>>>
>>> ---- Engineering Issues ----
>>>
>>> MTP #7 is reporting low throughput.
>
>