Subject: Re: [sloan-25mlog 4099] Re: 2.5m obslog 20180525 (SJD 58264)
From: Kaike Pan
Date: Sat, 26 May 2018 16:16:39 -0600
> On May 26, 2018, at 3:01 PM, Daniel Oravetz  =
wrote:
>=20
> Hi Kaike,
>=20
>>> We also found a SOP bug. When modifying an Apogee Manga sequence it
>>> seems SOP
>>> can only display so many Cs. For example, when starting a default
>>> sequence SOP
>>> will show Cccc and then move to cCcc once the next exposure starts. =
We
>>> tried to
>>> modify the sequence by adding 1 count of CC during the last =
exposure.
>>> SOP goes
>>> from cccC to ccCcc. This fails to show one completed c on the left.
>>> After that
>>> 4th exposure finishes SOP shows ccccC, omitting the final c on the
>>> right. Here
>>> the display is worrying because us observers don't know if another
>>> exposure will
>>> be taken. But another exposure does start without our intervention =
and
>>> SOP then
>>> displays ccccc, missing the C at the end. It seems that SOP can only
>>> show 5 Cs
>>> at once, but that that modifying does work correctly. All Apogee As =
and
>>> Bs
>>> executed correctly.
>>=20
>> Yes. modification on apogee and MaNGA sequence works differently from
>> eBOSS plate. This is how it works (I think that we a page in =
observing
>> tips page on this). Basically, modification will not show completed
>> exposures, it shows only on-going one and ones plan to take.
>=20
> You might have misunderstood the description. The problem was not with =
the
> modification of the sequence (the modified sequence actually completed
> appropriately) it was a problem with the sequence+progress display for =
'Do
> Apogee Mange Sequence' within SOP GUI (the sequence+progress display =
did
> not agree with where we were actually at in the modified sequence).
>=20
> The modification of count+dithers did, in fact, update the dither =
sequence
> from the current observed dither at the time, which is what it's =
supposed
> to do and in agreement with the note you're referring to on the =
Observing
> Tips page. However, as Gordon noted in the log, the sequence+progress
> display for 'Do Apogee Manga Sequence' did not display correctly after =
the
> modification, either backward in time (it didn't display an
> already-completed 'c'), or forward in time (it did not display the =
last
> in-progress exposure 'C').
>=20
> I wonder if this misbehavior was somehow triggered by the plate having
> been a 'DAB' plate? I don't remember having problems with the
> sequence+progress display for 'non-DAB' plates and I certainly know =
that
> 'Do Apogee Manga Sequence' displays more than five characters for the
> sequence+progress display for MaNGA-led observing and it does so =
correctly
> after modification as well.
>=20
> Dan
>=20
Yes, SOP can show more than five characters. I think that it might be =
due to that it=E2=80=99s a =E2=80=98DAB=E2=80=99 plate and
modification was done during the last =E2=80=98C=E2=80=99 of =
in-progressing one =E2=80=98cc=E2=80=99 count. We can investigate more =
and file=20
a ticket if needed. Thanks,