Subject: Re: [sloan-25mlog 6013] Re: 2.5m obslog 20220417 (SJD 59687)
From: Karen Kinemuchi
Date: Mon, 18 Apr 2022 12:58:58 -0600
We did not disable robots last night. =20
During the start of the telescope dither test, we noticed in the set of =
FVC loops (max-iter 4) for the first exposure at the before the actual =
telescope dithers started to resolve correctly, and then the last FVC =
loop iteration produced a very large RMS of 493.  Then the rest of the =
FVC loop results showed this value, but the other parameters appeared to =
be fine and the FVC loop succeeded.  As per the instructions, we went =
ahead, but noted that at least 4 robots did not seem to be in good =
locations. =20
Sorry that all the FVC loop output didn=E2=80=99t make it into the night =
log, but I=E2=80=99m going to recommend you check out fimg 14(?)-17.  =
For sure fimg-fvc1n-0017.fits, as that set of FVC output shows the RMS =
at this high level:
05:01:59 OBSERVER.karen 109 jaeger d =
fvc_filename=3D/data/fcam/59687/fimg-fvc1n-0017.fits
05:02:03 OBSERVER.karen 109 jaeger i fvc_rms=3D493.82
05:02:03 OBSERVER.karen 109 jaeger i fvc_deltarms=3D-480.76
05:02:03 OBSERVER.karen 109 jaeger i fvc_perc_90=3D14.9
05:02:03 OBSERVER.karen 109 jaeger i fvc_percent_reached=3D48.0
We started the telescope dither test around 05:00Z, so if you are going =
through logs, please look around that time stamp.
We also had a design that produced deadlocks and we had to manually fold =
up the robots since the jaeger could not execute the move.  I want to =
say it was during the second exposure of the base position at the start =
of the telescope dither test.  Sorry that information did not make it =
into the night log.
> On Apr 18, 2022, at 8:17 AM, Conor Sayres  wrote:
>=20
> Hi Guys,
>=20
> I don=E2=80=99t believe there=E2=80=99s been a change.  Can you guys =
give a couple examples of FVC image numbers to look at?  Did you disable =
extra robots?
>=20
> Conor
>=20
>=20
>=20
>> On Apr 18, 2022, at 10:02 AM, Kaike  wrote:
>>=20
>> Hello Jose and Conor,
>>=20
>> Is there any recent change in fvc fitting? The fvc rms is at 44.5 =
during afternoon checkout when the configuration was generated from =
folded robot position, which is normal. The rms went up to hundreds for =
science configurations. I am wondering if disabled robots are excluded =
from the rms calculations?
>>=20
>> Thanks,
>>=20
>> -Kaike=20
>>=20
>>> Notes:
>>>=20
>>> - All the FVC RMS for the dither field were extremely large. We =
continued with
>>> the test. It looks like 4 fibers caused the big issues.
>>>=20
>>=20
>=20
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