Date: Sat, 03 Jun 2000 06:07:54 -0600
From: "s. a. snedden"
Subject: 2.5m obslog 20000602 (MJD 51698)
Friday June 2 2000
                 Apache Point Observatory SDSS 2.5m
                            Observing Log
                             (MJD 51698)
OBSERVING TEAM:
===============
Atsuko Nitta Kleinman (APO)
Steph Snedden (APO)
Dan Long (APO)
Bing Chen (JHU) PT
Eric Neilsen (JHU) PT
VISITORS:
=========
Larry Carey (UW)
Douglas Finkbeinder (UC)
Steve Kent (FNAL)
David Schlegel (PU)
THE PLAN:
=========
Science if possible....
SYNOPSIS FOR NIGHT:
===================
More clouds, rain and humidity. We did not open. According to Dan,
"officially a dud".
TELESCOPE STATUS:
=================
In the enclosure at alt=33 deg with cartridge 7 mounted.
INTERLOCKS:
===========
none bypassed
SOFTWARE USED:
==============
IOP/SOP: v3_16_2
Watcher: v2_8_2
MCP: v4_2_4
TPM: v1_0_8
AstroDa: 14_28
TCC: 2.2.9
WEATHER SYNOPSIS (see below for hourly data):
=============================================
Clouds and rain. Winds out of the north, switching to the east at about
midnight.
GENERAL COMMENTS (see Problems below for details):
==================================================
Before Dark:
Atsuko tried again to set the spectrographs to nominal position. With
the goSpecFocus that works, things looked promising. But we found out
that the missing pixel problems confuses David's Soppito routines.
Without reliable numbers from Soppito, we cannot know if the
spectrographs positions are where we want or not. David worked on how to
change his code so that it can  deal with the missing pixel frames. The
fixes were accomplished by midnight. Positioning the fibers and
positioning the spectra in wavelength took about two hours. About ten
iterations were done, but this was probably more than necessary. We
would like to understand the chosen tolerances better, so we know if
this many iterations are really needed. goSpecFocus ran succesfully.
Larry C. put a shim on the slithead index pin of cartridge 2 to bring
the guide fibers into better focus. Unfortunately, the correction had a
sign error, so we are now a little more out of focus. Not to worry.
Tomorrow Larry plans to shave a bit off the pin, and that should correct
the problem.
DATA ACQUISITION (see IOP/SOP output below):
===========================================
IMAGING:
--------
Run     Type
---     ----
1540    bias   test
SPECTROSCOPY:
-------------
Exposure     Type
--------     ----
4276         bias   test
4277-4313    Flats and biases for engineering
MIRRORS:
========
PRIMARY:
--------
MIGS                   SHOULD BE
Axial A=                 1.9284
Axial B=                 0.5594
Axial C=                 0.5579
Transverse D=            0.3744
Lateral E=               1.9065
Lateral F=               0.4074
GALILS
Commanded:
Actual:
SETMIR VALUES
primDesOrient:
primOrient:
SECONDARY:
----------
Focus:
Temp:
Altitude:
MIGS
Axial A=
Axial B=
Axial C=
Transverse D=
GALILS
Commanded:
Actual:
SETMIR VALUES
secDesOrient:
secOrient:
FOCUS LOG:
==========
            M1 Piston     M2 Piston            Temp    Wind
Time  Inst   setmir    TCC  setmir   Az  Alt    C    Dir MPH  filt  FWHM
"
LN2 SCHEDULE:
=============
Spectrographs filled at 04:15. Spectro dewar weight at 04:15: 93 lb.
Imager dewar weight at 04:15: 220 lb.
Note: Sp1 fill coupling threads are stripped (problems section).
PROBLEMS:
=========
Spectrograph 1 LN2 fill coupling:
---------------------------------
When filling the spectro intermediate dewars we noted that the threaded
male end of the LN2 fill coupling of spectro 1 is stripped and easy to
cross-thread. It needs to be replaced or re-threaded with a die.
WEATHER DATA:
=============
                          Wind
Time   Temp F Dewp F  MPH   Direction    Dust  DIMM   Sky   Precip.
-------------------------------------------------------------------
16:01    49    44     24    33  (NNE)    719    -    cloudy none
17:01    53    42     12    73  (ENE)    422    -    cloudy none
18:01    55    39      9    43  (NE)     450    -    cloudy none
19:01    51    45     21    24  (NNE)   1028    -    cloudy none
20:01    51    43     21    26  (NNE)    723    -    cloudy none
21:01    51    43     15    29  (NNE)    642    -    cloudy none
22:01    50    43     18     7  (N)      787    -    cloudy trace
23:01    50    44     15    37  (NE)     694    -    cloudy trace
00:01    48    45     21    66  (ENE)    627    -    cloudy rain
01:01    48    41     16    72  (ENE)    766    -    cloudy trace
02:01    47    41     10    86  (E)      699    -    cloudy trace
03:01    50    40      6   162  (SSE)    399    -    cloudy none
04:01    50    39      6   187  (S)      648    -    cloudy none
[pmt]cl = partly, mostly, totally cloudy
DATA LOGS FROM IOP/SOP:
=======================