Subject: Re: [sloan-25mlog 5733] 2.5m obslog 20211031 (SJD 59519)
From: Kaike
Date: Mon, 1 Nov 2021 11:56:18 -0600
Thank you, Russet for comments.
Russet: Because both 35m and 25m use the same tcc products, can we use 5 =
minutes of 35m evening time to run a quick test?
Use =E2=80=9Ctcc track pterr=E2=80=9D command to get one star, take one =
image, then re-slew the telescope to the same RA, Dec with TUI slew =
window, take another image to see if 35m telescope see any star image =
shift between commands. Thanks
> On Nov 1, 2021, at 5:47 AM, Russet McMillan  =
wrote:
>=20
> Now the pointing offset issue sounds like a refraction problem.  I =
find it very unlikely that tcc would ignore refraction either for  =
track/pterr or track RA/Dec unless there is an explicit parameter in one =
of the commands such as /NoRefCoeff.  Is it possible some other piece of =
software is applying a refraction correction in one case, so that it =
gets double-applied by tcc and the other software?  Which track command =
resulted in pointing lower in the sky (further east for eastern azimuth, =
further west for western azimuth)?
Conor, can you please comment on this possibility?=20
Is there any change in tcc after June 28th, 2021? I recall that you =
remove lsst  stuff from sdss5-tcc. Is the current  sdss4-tcc still uses =
lsst stuff?
>=20
> Another possibility is the altitude fiducials.  Track/pterr does treat =
fiducials a little bit differently than normal slews, in that it doesn't =
apply fiducial measurements when it slews BACK to the target after doing =
a pointing correction on sky.  But, you're talking about seeing an =
offset in the initial slew to the pointing reference star without/before =
applying any correction, right?  And fiducials should be applied for =
that slew (unless you have a /NoAbsRefCorrect in the command).  Are you =
doing a long track/pterr slew, or a short one from a nearby position?
Both slew commands do apply fiducial corrections. We will try slew away =
after the =E2=80=9Ctcc track pterr" slew, so that the 2nd slew with =
=E2=80=9Ctcc track RA, Dec=E2=80=9D will make fiducial corrections.  it =
is unlikely that differences in fiducial corrections would introduce one =
arc minutes offsets. All test it out?
-Kaike
>=20
>> On Nov 1, 2021, at 5:29 AM, kpan@apo.nmsu.edu wrote:
>>=20
>>=20
>>                      APACHE POINT OBSERVATORY SDSS 2.5M
>>=20
>>                                OBSERVING LOG
>>                         Sunday October 31, 2021
>>=20
>>                                 (SJD 59519)
>>=20
>> ----  Observing Team ----
>>=20
>> Kaike Pan
>> Viktor Malanushenko (R)
>>=20
>> Jos=C3=A9 S=C3=A1nchez-Gallego (phone for sop)
>>=20
>> ---- Observing Plan ----
>>=20
>> Test shifts between two slew commands.
>>=20
>> ---- Observing Summary ----
>>=20
>> We tested star image shifts between "tcc track pterr" and "tcc track =
RA, Dec" commands. We first slew the telescope to a specified AZ, Alt =
with "tcc track pterr obs /rotty=3Dobj /rota=3D0 command". Take an image =
with FSC, then re-slew the telescope to the same RA and Dec with STUI =
slew wedge with proper motion information, take another FSC. Because the =
telescope points to the same RA, Dec, star image should not shift. =
However, star image shifts. We test at four AZ cardinals (AZ=3D-60, 30, =
120, 210). At each AZ cardinal, we run the test for altitude =3D 40, 55, =
and 70 degrees. Here are what we see:
>> 1. At the same azimuth cardinal, with tcc track pterr commands, star =
images at different altitudes locates within 2".=20
>> 2. With the tcc track pterr commands, star images are within 10" for =
all pointings tested.
>> 3. Star images shift between "tcc track pterr" and "tcc track RA, =
Dec". Shift amounts strongly correlated with altitude. Shifts are mostly =
in X-direction although Y-direction also have some. The lower the =
altitude is, the larger amount the shift is. The shift. At 40 degree =
altitude, the shift is as large as 50".
>>=20
>> Notes:
>> =3D=3D=3D=3D=3D=3D
>> 1. Looks like the "building motion enable" LED is out. Please check.=20=
>>=20
>> ---- Observing Log ----
>>=20
>> Afternoon:
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D
>> test actor scripts says sop is ok, but sop ping doesn't pong (no =
error either). "sop script run apogee eveingcals_nodither" doesn't =
return any error, but the cal data taking doesn't start. "hub startNibs =
sop" fixed the issue.
>>=20
>> Apogeee evaning cals and fpi were taken and checked. They are good.
>> Forgot to change exposure type to arc when take fpi data. so, the fpi =
exposure has exposure type of "dark".
>>=20
>> All systems and actors (except for sop) are running, working.
>>=20
>> 00:25Z: started ventilation.
>>=20
>> Night:
>> =3D=3D=3D=3D=3D=3D=3D
>>=20
>> 01:05Z: put small parts on the corrector turtle table in a box. open =
the enclosure.
>>=20
>> Looks like the building motion enable LED is out.
>>=20
>> 03:40Z: tcc track/pterr 120, 55 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)=20
>> the telescope focus is at 450 um.
>> 03:54Z: with "tcc track pterr", the star (RA=3D2:36:32.88, =
Dec=3D40:01:34.40, alt=3D52.9, az=3D114.8)) image locate at (1055, 996)
>> slew to the same RA and Dec with tcc track RA, Dec, the star image =
shifts to
>> (610, 1018), The shift is about 33" in X. If proper motions are =
included in the slew, the star image is at (656, 970), 30" in X =
direction.
>> star images: (1055, 996) --> (610, 1018)
>>=20
>> 04:05Z: tcc track/pterr 120, 40 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(10.5,11.5)
>> got the star at Az=3D118.6, alt=3D39.7, rot=3D258. RA=3D3:59:55.61, =
Dec=3D40:54:19.48
>> star image at (1055, 996), the same spot. with tcc track RA, Dec, the =
star image shifts to (430, 1123)
>> star images: (1055, 996) --> (430, 1123)
>>=20
>> 04:15Z: tcc track/pterr 120, 70 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(10.5,11.5)
>> RA=3D1:21:28.84, Dec=3D40:57:28.93, AZ=3D122.1, alt=3D71.1, =
rot=3D289.2, the star image is at (1058, 982). tcc track RA, Dec shifts =
the star to (904, 930).
>> star images: (1058, 982) --> (904, 930).=20
>>=20
>> 04:27Z: tcc track/pterr 30, 70 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(10.5,11.5)
>> RA=3D0:46:34.35, Dec=3D14:19:30.21, AZ=3D29.1, Alt=3D69.6, rot=3D204.9,=
=20
>> star images: (1105, 1028) --> (1087, 1206)
>>=20
>> 04:35Z:tcc track/pterr 30, 55 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(10.5,11.5)
>> RA=3D1:20:19.81, Dec=3D2:29:15.40, AZ=3D30.1, Alt=3D56.3, Rot=3D205.0
>> star images: (1101, 1010) --> (955, 1344)
>>=20
>> 04:41Z: tcc track/pterr 30, 40 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D1:45:50.90, Dec=3D-11:19:55.79, AZ=3D28.3, Alt=3D41.6, Rot+204.1
>> star images: (1097, 1010) --> (895, 1482)
>>=20
>> 04:47Z: tcc track/pterr -60, 40 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D21:35:25.84, Dec=3D-00:58:51.89, AZ=3D-59.1, Alt=3D37.4, =
rot=3D133.7
>> star images: (1186, 1014) --> (1747, 1356)
>>=20
>> 04:56Z: tcc track/pterr -60, 40 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D21:52:25.40, Dec=3D2:23:13.07 AZ=3D-60.4, Alt=3D41.2, rot=3D132.9
>> star images: (1178, 1010) --> (1669, 1367)
>>=20
>> 05:03Z: tcc track/pterr -60, 55 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D22:37:08.37, Dec=3D11:58:58.60, AZ=3D-61.6, Alt=3D54.6, =
rot=3D130.8
>> star images: (1191,1028) -->(1463, 1238)
>>=20
>> 05:11Z: tcc track/pterr -60, 70 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D23:52:08.03, Dec=3D22:56:48.24, AZ=3D-56.7, Alt=3D72.9, =
rot=3D130.1
>> star images: (1197, 1014) --> (1330, 1119)
>>=20
>> 05:22Z: tcc track/pterr 210, 70 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D0:04:50.84, Dec=3D50:14:05.64, AZ=3D-153.3, alt=3D69.5, rot=3D36.5=
>> star images: (1160, 977) --> (1288,813)
>>=20
>> 05:28Z: tcc track/pterr 210, 55 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D22:56:11.51, Dec=3D58:40:01.59, AZ=3D-149,8, Alt=3D56.0, =
rot=3D54.9
>> star images: (1151, 1000) --> (1467, 790)
>>=20
>> 05:34Z: tcc track/pterr 210, 40 obs /rotty=3Dobj /rota=3D0 =
/magRange=3D(11.5,12.5)
>> RA=3D21:05:23.34, Dec=3D64:11;34.60, AZ=3D-149.4, alt=3D41.2, =
rot=3D80.8
>> star images: (1151, 1005) --> (1798,918)
>>=20
>> 06:36Z: we don't have more tasks to run. Close.
>>=20
>> 11:30Z: start morning cals.
>>=20
>>=20
>> ---- Mirror Numbers ----
>>=20
>>=20
>> PRIMARY:
>> --------
>> Scale: 1.000000
>>=20
>> MIGS		TONIGHT	NOMINAL
>> Axial A:	 0.0050	 0.0040
>> Axial B:	 0.0070	 0.0310
>> Axial C:	-0.1210	-0.1180
>> Trans D:	-0.0356	-0.0362
>> Lateral E:	 0.3310	 0.3315
>> Lateral F:	 0.5340	 0.5340
>>=20
>> GALILS
>> Commanded:  12500 -1600 5300 47050 -8800 -8400
>> Actual:     12500 -1600 5300 47050 -8800 -8400
>>=20
>> SETMIR VALUES
>> PrimDesOrient: 0.0 -31.23 -9.35 -511.08 1708.0
>> PrimOrient:    0.0 -31.15 -9.21 -511.43 1706.53
>>=20
>> SECONDARY:
>> ----------
>>=20
>> Focus:      0.0000
>> Air temp:    10.78
>> Altitude:   30.000038956303893
>>=20
>> MIGS		TONIGHT	NOMINAL
>> Axial A:	-9.4520	-9.4440
>> Axial B:	-9.4670	-9.4730
>> Axial C:	-9.5000	-9.5010
>> Trans D:	 0.1030	 0.1000
>>=20
>> GALILS
>> Commanded: 4624650 4620950 4641650 -50 -3450
>> Actual:    4607168 4607369 4606670 -50 -3450
>>=20
>> SETMIR VALUES
>> SecDesOrient: 3657.0 0.0 0.0 0.0 42.22
>> SecOrient:    3656.85 0.16 -0.01 -0.01 42.58
>>=20
>>=20
>>=20
>> ---- Telescope Status ----
>>=20
>> 00:25    Started ventilation
>> 01:05    encl25m : open
>> 06:36Z    encl25m : closed
>>=20
>> No interlocks bypassed
>>=20
>> Status at: 11:30Z
>> Telescope stowed at:    121.0, 30.0,   0.0  mount
>> Instrument mounted:     cartridge =3D  FSC  =20
>> Counterweights at:        557, 557, 577,  577 =20
>> LN2 autofill systems:   Connected and turned on
>> 180L LN2 dewar scales:  SP1    145    lbs,  20.7   psi
>>=20
>>=20
>>=20
>>=20
>> ---- Software Used ----
>>=20
>> -- STUI software:=20
>> STUI          : 1.7.13
>> alerts        : 2.1.6
>> apo           : 3.0.0
>> boss          : 6.0.1-alpha.0
>> -boss.specMec : 3.0.4
>> guider        : 4.0.0
>> ecamera       : FAILED
>> fliswarm      : FAILED
>> hartmann      : 2.0.0
>> hub           : 5.0.0a0
>> mcp           : 2.1
>> -mcp.plc      : 34
>> -mcp.azFiduci : v1_147
>> -mcp.altFiduc : v1_147
>> -mcp.rotFiduc : v1_147
>> sop           : 0.1.0-alpha.0
>> tcc           : 1.4.0
>> apogee        : not availble
>> apogeecal     : not availble
>> apogeeql      : v1_7_0dev
>> STUIAdditions : 3.1.9
>>=20
>> ____________________________________________________________
>> Logs of Nightly APO Activities
>> =
https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html
>=20