Subject: 3.5m Night Log 20220418 From: dembicky@apo.nmsu.edu Date: Tue, 19 Apr 2022 11:42:45 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Monday, April 18, 2022 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- CU02 A.Kowalski G.Stefansson NM06 A.Hedlund A.Hedlund AP01 S.Merkowitz R.McMillan ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- CU02 ARCTIC --:-- --:-- NM06 ECHELLE 03:18 05:07 AP01 APOLLO --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- CU02/R 19:44 03:10 2.3 5.1 0 0 0.0 0.0 0 0 NM06/R 03:10 05:20 0 0 0 0 0.0 2.2 0 0 AP01/R 05:20 06:20 0 1.0 0 0 0.0 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky I got an altitude motion error on the initial upward test slew. The second slew, after another init, worked fine. Dust was elevated at the start of the night but incoming clouds were what kept us closed. Skies started to clear around 02:30, but unfortunately the transit for the first half was over. Dust levels outside were still above 4000 so I held off opening since the dust inside would rise when I open and we would like them below 4000cts inside. Fans were run in 'reverse' mode while open. Of course clouds moved in just as I finished focusing the telescope, but we observed through them. Dust climbed to near limit during the last part of the 2nd program. We stayed open but closed for APOLLO. APOLLO also was having issues with their guide camera and we also were dealing with some clouds as well. ------- 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 -------------------------------------------------------------------------- 03:31 ecamera 148( -173) 12 67 11.6 11.3 12.8 11.3 11.5 clear 1.40 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 59 3 14 183 (S) 3610 mstly clr none 17:00 65 5 11 244 (WSW) 3908 mstly clr dust 18:00 62 4 10 192 (SSW) 4006 ptly cldy dust 19:00 59 5 15 183 (S) 4020 mstly cldy dust 20:00 55 6 18 128 (SE) 4533 mstly cldy dust 21:00 51 25 13 93 (E) 6753 cloudy dust 22:00 50 32 13 87 (E) 6331 cloudy dust 23:00 50 32 16 115 (ESE) 6516 cloudy dust 00:00 52 32 19 141 (SE) 6027 cloudy dust 01:00 51 32 19 155 (SSE) 6200 cloudy dust 02:00 53 31 20 182 (S) 4406 mstly cldy dust 03:00 54 30 21 202 (SSW) 4432 mstly cldy dust 04:00 52 32 21 194 (SSW) 4838 ptly cldy dust 05:00 50 31 19 197 (SSW) 5403 ptly cldy dust 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. ---------- TELESCOPE SOFTWARE ---------- Current TCC version: 1.4.2 Current HUB version: v20171231_01 Current TUI version: 2.6.0