Date: Thu, 15 Jan 2004 10:45:29 -0500 (EST) From: jegunn Subject: Re: 2.5m obslog 20040114 (MJD 53019) There is a pretty big inrush current when the lamps are turned on, and fuses fatigue. (plus, of course, complaining about the bad weather). If it happens again soon we should perhaps be concerned, but not, I think, yet. --jim On Thu, 15 Jan 2004, Daniel Long wrote: > > APACHE POINT OBSERVATORY SDSS 2.5M > > OBSERVING LOG > Wednesday January 14, 2004 > > (MJD 53019) > > ---=== OBSERVING TEAM ===--- > > Dan Long > Pete Newman > > ---=== OBSERVING PLAN ===--- > > Snow! > > ---=== OBSERVING SUMMARY ===--- > > > Snow, humidity, and high winds started around two hours before sunset. > Inclement conditions persisted through out the night. We never opened. > > > ---=== OBSERVING LOG ===--- > > > Afternoon: > ---------- > > Spectrographs did not need refocusing. > > All checks went well. > > Only one thing out of the ordinary. When testing the calibration lamps while > at the telescope, the flat field lamps did not come on. They worked fine not > half an hour earlier when taking a flat with the spectrographs. The fuse was > found to be blown in the power supply rack in the lower enclosure. It was > replaced, and the flat field lamps came on normally when requested to from the > mcp. No obvious reason why the fuse blew. Maybe it was the telescope's way > of complaining about the weather. > > Night: > ------ > > Bands of snow. Brisk to high winds blowing it all around. Two inches or so > fell between 3 PM and 1 AM local time (22:00Z and 08:00Z). More on the way > according to the radar. > > The oxygen depletion alarm flashed a few times in protest to the conditions as > well. A calibration tweak on the sensor(s) may be needed. > > Threw in the towel and shut everything down around 08:00Z as the next band of > snow moved in. > > > ---=== IMAGING RUN SUMMARY ===--- > > Run Time Stripe Lambda Last Flavor Comments > Start End Begin End Frame > ------------------------------------------------------------------------- > > 4365 23:30Z 23:36Z 100 O -184.49 -182.93 24 ignore > > ---=== IMAGING RUN DETAILS ===--- > > > ---=== SKIPPY RESULTS ===--- > > Run Frame nFrames stars muErr muRms nuErr nuRms rot az el > --------------------------------------------------------------------------- > > ---=== LTMATCH RESULTS ===--- > > Run Field nFields alt az nGood rowMean rowSig colMean colSig rot > ------------------------------------------------------------------------ > ---=== SPECTROSCOPY DATA SUMMARY ===--- > > Summary Checked (y/n): n/a > QA Procedures Done (y/n): n/a > > UT Exp Time flavor comment (S/N)^2 totals > ========================================== b1 r1 b2 r2 > > 23:24 24664 2.0 arc > > ---=== TELESCOPE OFFSETS AND SCALE I ===--- > > Time Instrument Az Alt Rot Scale > pos offset pos offset pos offset > ------------------------------------------------------------------------------ > > ---=== TELESCOPE OFFSETS AND SCALE II ===--- > > > ---=== DATA TAPE SUMMARY ===--- > > > Goes: JLCloudy1 > Stays: JLCloudy2 > > ---=== FOCUS LOG ===--- > > setmir piston Temp Wind > Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm > ------------------------------------------------------------------------------ > > ---=== WEATHER LOG ===--- > > Wind > Time Temp F Dewp F MPH Direction Dust DIMM Sky > > 23:25Z 30 27 22 75 (ENE) 186 - Snow > 23:57Z 29 27 21 83 (E) 257 - Snow > 00:29Z 29 27 19 84 (E) 442 - Lt Snow > 01:01Z 29 27 21 81 (E) 263 - Lt Snow > 01:31Z 29 27 27 77 (ENE) 273 - Lt Snow > 02:02Z 29 27 14 98 (E) 509 - Snow > 02:32Z 29 27 21 99 (E) 365 - Lt Snow > 03:02Z 29 26 24 87 (E) 81 - Lt Snow > 03:32Z 29 26 15 84 (E) 45 - Blowing Snow > 04:02Z 29 27 18 85 (E) 39 - Blowing Snow > 04:34Z 29 28 16 86 (E) 29 - Blowing Snow > 05:05Z 29 28 13 105 (ESE) 41 - Cloudy > 05:35Z 29 27 18 81 (E) 13 - Lt/Bl Snow > 06:05Z 30 28 14 86 (E) 14 - Cloudy > 06:35Z 30 29 16 113 (ESE) 8 - Cloudy > 07:06Z 30 29 14 110 (ESE) 7 - Lt Snow > 07:38Z 30 29 13 112 (ESE) 2 - Lt Snow > 08:10Z 30 29 15 110 (ESE) 3 - Lt Snow > > > ---=== TELESCOPE STATUS ===--- > > > > Enclosure never opened. > > Stowed at 30 deg alt, Cartridge 8 installed. Spectro auto-fill connected. > Spectro dewar 08:00Z Dewar wt 257 lb > Imager dewar 08:00Z Dewar wt 223 lb > > Extra 180 L dewar for the imager is in the enclosure. > No interlocks bypassed. > > > ---=== SOFTWARE USED ===--- > > IOP/SOP: v3_125_1 > Watcher: v2_26_0 > MCP: v5_24_0 > TPM: tpm_v2_36_0 > AstroDa: v14_47 > TCC: TCC 2.7.1 July 22 2003 > sdssProcedures: v1_82 > SoS: v4_10_7 > hoggPT: v1_6_9 > plate-mapper: v4_3_1 > > ---=== MIRROR NUMBERS ===--- > > > > PRIMARY: > -------- > Scale: 1.000000 > > MIGS TONIGHT NOMINAL > Axial A 0.5520 0.5420 > Axial B 0.6360 0.6390 > Axial C 1.0850 1.0900 > Trans D -8.4550 -8.4610 > Lateral E 10.8712 10.8966 > Lateral F 10.8458 10.8712 > > GALILS > Commanded: 4600. -2850. 850. -9250. 18400. 17850. > Actual: 4600. -2850. 850. -9250. 18400. 17850. > > > SETMIR VALUES > PriDesOrient: 0.00 0.00 15.20 829.90 1.60 > PriOrient: 0.00 0.00 14.91 830.49 3.19 > > SECONDARY: > ---------- > Focus: 0.00 > Air Temp.: -1.2 > Alt.: 30.379168 > > MIGS TONIGHT NOMINAL > Axial A 1.5100 1.5160 > Axial B 1.1060 1.1180 > Axial C 1.1130 1.1210 > Trans D 0.0040 -0.0050 > > GALILS > Commanded: 1628669. 1547813. 1574307. -3900. -8750. > Actual: 1628650. 1548200. 1574500. -3900. -8750. > > > SETMIR VALUES > SecDesOrient: 1257.00 0.00 -25.00 0.00 146.27 > SecOrient: 1256.86 -0.02 -25.12 0.18 146.57 > > > > ---=== PROBLEMS IN DETAIL ===--- > > > > DSS DSS DSS DSS DSS Digital Sky Survey DSS DSS DSS DSS DSS DSS > DSS *** The information posted to SDSS mailing lists is proprietary *** > DSS This is message 1794 in the sdss-25mlog archive, URL > DSS http://www.astro.princeton.edu:81/sdss-25mlog/msg.1794.html > DSS The index is at http://www.astro.princeton.edu:81/sdss-25mlog/INDEX.html > DSS To join/leave the list, go to > DSS http://www.astro.princeton.edu:81/cgi-bin/mailinglists.pl/show_subscription?list=sdss-25mlog > DSS To post a message, mail it to sdss-25mlog@astro.princeton.edu > DSS > DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS DSS >