From: "N.C. Hastings"
Subject: 3.5m Night Log 990330
Date: Wed, 31 Mar 1999 04:35:00 -0700
                 Apache Point Observatory, Sunspot, NM
                       Tuesday, March 30th, 1999
                     3.5-meter Night Observing Log
                                Actual
----------------------------------------------------------------------
ASTRONOMER     OBSERVER(S)       INSTRUMENT    DATE      START  FINISH
----------------------------------------------------------------------
B.Rodgers      B.Rodgers          DIS          3/30      19:45  20:33
E.Turner       C.Hastings         SPIcam       3/30      20:58  23:55
S.Kent         J.Annis            GrIm II      3/31      00:05  03:30
A.Diercks      G.Magnier          GrIm II      3/31      03:30  04:30
----------------------------------------------------------------------
 INST       SCHEDULED      WEATH     EQUIP      OBS     DAY   NOTUSED
I/RS/DN   START  FINISH    D    B    D    B    D    B   USE   D    B
----------------------------------------------------------------------
UW03/R    19:45  20:45     -    0    -    0    -   1.0   0    -    0
PU04/S    20:45  00:10     -    0    -    0    -   3.5   0    -    0
UC06/R    00:10  03:30     -   1.0   -    0    -   2.3   0    -    0
UW08/R    03:30  04:30     -   1.0   -    0    -    0    0    -    0
               -------------- Activity Log --------------
1st & 2nd Half Observing Specialist: N.C.Hastings
	The telescope opened at 18:40 for cooling with high dust, but just
barely below closure limits. During the nigh the dust counts were
consistently between 2k-2.8k, so another mirror cleaning may be a good
idea soon. We closed due to dust at 02:30 MST and were unable to open
again.
                               FOCUS LOG
                            March 30th 1999
                  Best    Telescope    Temp      Wind          Seeing
Time  Instrmnt   Focus      Az  El   Air/Truss  Dir MPH  filter FWHM"
---------------------------------------------------------------------
19:10 DIS     -000(6545)  -123  57   8.9/9.7    206  12  None   1.31"
19:20 Guider 58000(6545)  -124  57   8.9/9.5    210  16  None   1.20"
20:50 SPIcam  -150(6264)   133  57   8.9/8.9    214  22    r'   1.28"
00:10 GrIm II +070(6627)    93  24   6.4/7.7    260  17  f/5-K  1.22"
                              WEATHER LOG
                            March 30th 1999
                                  Wind
     Time   Temp-F Dewp-F MPH   Direction    Dust      Sky      Precip
    ------------------------------------------------------------------
     16:01    53    18     24   224  (SW)    1821     Cirrus     None
     17:01    49    18     22   221  (SW)    2080     Cirrus     None
     18:01    49    17     20   212  (SSW)   2297     Cirrus     None
     19:01    48    12     17   217  (SW)    1927     Cirrus     None
     20:01    49    11     17   208  (SSW)   2011     Cirrus     None
     21:01    48    14     25   215  (SW)    2012     Cirrus     None
     22:01    48    14     21   215  (SW)    1902     Cirrus     None
     23:01    48    14     14   202  (SSW)   1751     Cirrus     None
     00:01    46    13     13   220  (SW)    1732     Cirrus     None
     01:01    44    10     16   259  (W)     2020     Cirrus     None
     02:01    43    10     15   261  (W)     2339     Cirrus     None
     03:01    42     5     21   252  (WSW)   2743     Cirrus     None
     04:01    41     4     21   262  (W)     3333     Cirrus     None
note: the wind was coming from the azimuth listed.  The convention
used is north=0 degrees, east=90 degrees. The dust count is for the
particles > 1 micron per 0.1 cu.ft.
                            TELESCOPE STATUS
Primary, secondary, and tertiary mirrors in place and collimated.
Primary support system operational. Mirror ventilation system in
place.  Telescope drives operational. Current Remark version: 2.55b1
Current guide software version: GIm Ctrl v3.0b 17.out
-  NCH