Subject: 3.5m Night Log 20250905
From: tsutherland@apo.nmsu.edu
Date: Sat,  6 Sep 2025 11:06:57 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, September 05, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
BY01  S.Turner          S.Turner
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY01  NICFPS         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY01/R      19:31  06:33   1.1 10.0   0    0   0.0  0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
None of the humidity sensors could agree with each other tonight (they ranged from 15% to 93% humidity on simultaneous readings for example). But that didn't matter too much since there was rain and clouds all night and we never opened. Gave up around 4:45am.
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    52    30      9   190    (S)   1450   cloudy     none
     17:00    51    30      5   195  (SSW)    459   cloudy     none
     18:00    53    28      5   187    (S)    583   cloudy     fog
     19:00    51    28     11   185    (S) 182597   cloudy     fog
     20:00    50    27      7   174    (S)    879   cloudy     fog
     21:00    51    27      7   208  (SSW)  40337   cloudy   lt rain
     22:00    50    19      2   211  (SSW) 166777   cloudy     rain
     23:00    50     5      1   210  (SSW)  12131   cloudy   lt rain
     00:00    51     8      1   193  (SSW)    384   cloudy    humid
     01:00    51    17      1   203  (SSW)    566   cloudy    humid
     02:00    50    16      3   116  (ESE)   2769 mstly cldy  humid
     03:00    51    17      1   207  (SSW)    380   cloudy     fog
     04:00    50    15      3   213  (SSW)  38990 mstly clr    fog
     05:00    50    14      1   210  (SSW)  53313 mstly clr    fog
     Note: the wind was coming from the azimuth listed.
     The convention used is north=0 degrees, east=90 degrees.
     The dust count is particles > 1u per 0.1 cubic feet.
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