Subject: Re: [sdss3-25mlog 956] 2.5m obslog 20121202 (MJD 56264)
From: Kaike Pan
Date: Mon, 3 Dec 2012 11:47:02 -0700
On Dec 3, 2012, at 6:46 AM, kinemuchi@apo.nmsu.edu wrote:
>=20
>                       APACHE POINT OBSERVATORY SDSS 2.5M
>=20
>                                 OBSERVING LOG
>                          Sunday December 02, 2012
>=20
>                                  (MJD 56264)
>=20
> ----  Observing Team ----
>=20
> Viktor Malanushenko
> Karen Kinemuchi
> afternoon - Olena Malanushenko
> Joe Huehnerhoff came by to swap out Cart 5 from the bay for Cart 12 at =
02:00Z.
>=20
> ---- Observing Plan ----
>=20
> 2 Dec 2012  56264.0  0.72  01:09 12:37  22:55 10:25  BOSS until 03:41 =
(2.5 h),=20
> then APOGEE (9.2 h)
>=20
> ---- Observing Summary ----
>=20
> BOSS Observing:
> Cart 10 (Plate 5962) - not complete
> Cart 17 (Plate 6176) - COMPLETE!
> Cart 12 (Plate 6146) - not complete
>=20
> APOGEE Observing
> Cart 9 (Plate 6536) - 2xABBA
> Cart 7 (Plate 6247) - 2xABBA
> Cart 6 (Plate 6339) - 2xABBA
> Cart 3 (Plate 6333) - 2xABBA
> Cart 4 (Plate 6357) - 2xABBA
> Cart 1 (Plate 6568) - 2xABBA
> Cart 8 (Plate 6576) - 1xABBA
> Problems Summary:
> Before the first cartridge of the night (BOSS), we had trouble with =
the altitude
> brake not clearing when issuing "axis init".  After checking for =
obstructions,
> stop buttons, the amplifiers, and the interlocks display, and after =
issuing
> several "axis init" commands, the altitude brake finally cooperated =
and
> released.  BOSS TIME LOST: ~20 MINUTES.
Hi Karen,=20
 You guys might spend 20 min to solve the problem. However, because 15 =
deg twilight=20
ended at 1:09, the first BOSS exposure was started at 1:13. I would say =
that
only 4 min BOSS time was lost. =20
>=20
> Joe Huehnerhoff stopped by at 02:00Z and the observers consulted with =
him about
> the altitude brake problem and it will be investigated in the morning. =
=20
>=20
> Joe also kindly swapped out Cart 5 from the bay for Cart 12 for =
temperature
> equilibrium.  Cart 12 was observed without any problems.  Thanks Joe!
>=20
> DIMM software was off by 1 hour so the telescope would slew away from =
Polaris.=20
> Observers moved the DIMM scope back onto Polaris, but the time is =
still showing
> 1 hour behind UTC.  DIMM worked fine this evening and did not =
disconnect at 08:00Z.
>=20
> At 08:20Z, the guider failed and restarted itself without any =
instruction from
> the observers.  This time the cart/plate information was not lost; we =
reissued
> goToField and the guider started normally.  Please see Problems in =
Detail for
> the rundown of what happened.  APOGEE TIME LOST: 5 MINUTES.
>=20
> At 11:00Z, one of the slithead latches of Cart 1 would not latch =
(green flashing
> light on the east end control box).  The latch connected after 3 tries =
of
> remove/install of the cart.  APOGEE TIME LOST: 5 MINUTES.
>=20
> ---- Observing Log ----