Subject: 2.5m obslog 20190823 (SJD 58719)
From: kpan@apo.nmsu.edu
Date: Sat, 24 Aug 2019 11:11:44 +0000 (UTC)
                       APACHE POINT OBSERVATORY SDSS 2.5M
                                 OBSERVING LOG
                          Friday August 23, 2019
                                  (SJD 58719)
----  Observing Team ----
Kaike Pan
---- Observing Plan ----
Monitor instruments and SP1 vacuum pumping status.
---- Observing Summary ----
SP2 fills completed normally. Forced a primary and secondary fill at 5:00 AM.
APOGEE vacuum varies between 1.11x10^-6 and 1.18x10^-6, slightly highly than its
nominal value 1.1x10^-6.
SP1 vacuum pumping: The vacuum steadily improved from 1.1X10^-5 to 8.0x10^06 in
the first four hours, from 5:00 PM to 9:00 PM, then the vacuum gauge reading
goes up and down, but the trend is improving at a much slower pace. At 5:15 AM,
the reading varies between 6.98x10^-6 and 7.2x10^-6.
---- Telescope Status ----
     Started ventilation
     encl25m : open
     encl25m : closed
No interlocks bypassed
Status at: 11:00
Telescope stowed at:    121.0, 30.0,   0.0  mount
Instrument mounted:     cartridge = 6
Counterweights at:
LN2 autofill systems:   Connected and turned on
180L LN2 dewar scales:  SP1        lbs,     psi
                        SP2   156.5     lbs,     psi