APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Saturday October 30, 2004 (MJD 53309) ---=== OBSERVING TEAM ===--- Jon Barentine (volunteer1) Steph Snedden (volunteer2) Mike Harvanek (swing) French Leger (by phone) Dan Long (by phone) ---=== OBSERVING PLAN ===--- More monthly checkout and supernovae science. ---=== OBSERVING SUMMARY ===--- New fiducial tables were implemented. After 3 sets of altitude fiducial sweeps and 9 iterations on the alt table, we finally got things to the point where the fiducial corrections are small enough to be applied AND the pin goes in at 90 degrees reliably. The az fiducial data had to have the extra fiducials beyond the old hard limits edited out by hand. If the telescope tracks into this "new" region between the new and old hard limits, there will be no fiducial corrections in this region and it may be necessary to force a fiducial correction upon leaving this region. The rotator table gave no problems. M1 homed & relaxed. M2 homed. The telescope and windbaffle may be out of altitude alignment. Could the day staff please check it out. After tonight's activities, we are ready for a new pointing model (i.e., should be the first order of business the next night we're open). ---=== OBSERVING LOG ===--- Afternoon: ---------- New fiducial tables were built, checked in and installed. The az data had to have the extra fiducials beyond the old hard limits edited out by hand. If the telescope goes into this "new" region between the new and old hard limits, there will be no fiducial corrections in this region and it may be necessary to force a fiducial correction upon leaving this region. There were problems with the altitude fiducials. At first the new table appeared to be working well as all the alt fiducials were being read and all the corrections were small. However, upon reaching 90 degrees the problems began. At what it thought was 90 degrees, the telescope was clearly beyond 90 degrees and the pin could not be engaged until the telescope was at 88.75 degrees. Furthermore, the pin stop became activated even though the pin was not engaged. The pin stop could be heard triggering and the altitude brake would come on. It took 3 or 4 attempts to initialize the axis. Several attempts at refiducializing did not solve the problem. Pinning the telescope at zenith and using the mcp p command to set the alt position at 90 yielded fiducial corrections in the 1e5 to 1e6 range for ALL the alt fiducials so this was unacceptable as well. At this point, it was decided to take another set of altitude fiducial data (thanks Steph!). This second set of altitude fiducial data was taken after pinning the telescope and setting the position to 90 degrees using "p" rather than by setting the position with a fiducial as is normally done. Unfortunately, this new set of fiducials had the same problem. Steph then took another set of fiducial data using the standard procedure (i.e., setting the position by fiducializing) but this didn't work either. We then tried building the table without using the -canon flag but this made things much worse. Finally, we did 5 iterations on the alt table using the -setCanonical flag, using the size of the too-large-to-correct errors as the amount to adjust the canonical position. This improved things to the point where the fiducial corrections are small enough to be applied (on the order of 100 or so) and you can get the pin in at 90. Whew. Finally. Kudos to Mike for figuring out the proper use of -setCanonical in plotMcpFiducials. A note here that when you use the too-large-to correct errors to modify the canonical fiducial value, the sign is the same as poserr, and opposite to the attempted correction, i.e., if poserr is negative, subtract the offset from the chosen fiducial in the current table, then check in the new table using standard procedures. This should be folklored, but not tonight. Mike and Steph can fight over who gets to do it. The telescope and wind baffle appear to be somewhat out of altitude alignment as the alt pointer shows the indicator to be about 2/3 of a unit to the right of the center mark. Perhaps this is why we are getting frequent windscreen touches in altitude. Could the day staff have a look please. Primary mirror was homed and relaxed. M2 was homed. Night: ------ Clouds persisted all night and we did not open. Ran endNight on the cloudy night tapes. endNight rejoiced. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 4920 21:03Z 21:25Z 100 O 64.54 69.91 50 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): QA Procedures Done (y/n): UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 29075, plate -9999 ------- 21:00 29075 0.0 bias ---=== 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: JL Stays: JL ---=== 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 20:46Z 45 25 6 238 (WSW) 3 - 21:17Z 43 23 9 266 (W) -9999 - 21:49Z 44 22 8 262 (W) -9999 - 22:22Z 42 30 11 255 (WSW) -9999 - 22:54Z 40 28 8 216 (SW) -9999 - 23:26Z 38 29 7 224 (SW) -9999 - 23:58Z 38 28 5 220 (SW) -9999 - mostly cloudy 00:30Z 37 29 5 187 (S) -9999 - 01:03Z 37 28 9 216 (SW) -9999 - 01:35Z 37 27 7 192 (SSW) -9999 - 02:07Z 39 20 11 232 (SW) -9999 - 02:39Z 38 24 11 234 (SW) -9999 - 03:11Z 39 23 11 240 (WSW) -9999 - 03:43Z 38 26 7 260 (W) -9999 - 04:16Z 38 29 10 237 (WSW) -9999 - 04:48Z 39 20 11 245 (WSW) -9999 - 05:20Z 39 20 7 225 (SW) -9999 - 05:52Z 39 21 7 272 (W) -9999 - 06:24Z 39 23 8 264 (W) -9999 - 06:57Z 39 25 11 265 (W) -9999 - 07:34Z 39 26 10 251 (WSW) -9999 - 08:07Z 39 28 9 250 (WSW) -9999 - 08:39Z 39 28 12 258 (WSW) -9999 - 09:11Z 38 29 10 263 (W) -9999 - 09:23Z 38 29 7 247 (WSW) -9999 - 10:00Z 38 29 8 268 (W) -9999 - 10:32Z 38 28 7 195 (SSW) -9999 - 11:04Z 37 28 12 219 (SW) -9999 - 11:36Z 37 29 13 210 (SSW) -9999 - ---=== TELESCOPE STATUS ===--- 00:00Z Enclosure doors opened, fans and blowers on, louvers opened. 11:45Z Enclosure doors closed, fans off, louvers closed. Telescope parked at 121,30 with Cart 1 (Plate 1865) mounted. Spectro autofill reconnected. Dewar weights at 11:45Z Imager: 232 lbs 24 psi Spectro: 193 lbs 26 psi No interlocks bypassed. ---=== SOFTWARE USED ===--- IOP/SOP: v3_142_0 Watcher: v2_29_0 MCP: v5_25_0 TPM: tpm_v2_43_0 AstroDa: v14_47 TCC: TCC 2.7.2.1 August 6 2004 sdssProcedures: v1_95 SoS: v4_10_7 hoggPT: v1_6_9 plate-mapper: v4_3_1 ---=== MIRROR NUMBERS ===--- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A 0.5040 0.5250 Axial B 0.5860 0.6020 Axial C 0.8920 0.9050 Trans D -8.6160 -8.6120 Lateral E 10.0330 10.0203 Lateral F 11.6078 11.5951 GALILS Commanded: 4800. -2150. 2600. -6900. -7850. -7900. Actual: 4782. -2150. 2618. -6880. -7862. -7902. SETMIR VALUES PriDesOrient: 0.00 -2.76 1.04 57.00 151.01 PriOrient: 0.00 -3.04 0.88 57.42 149.40 SECONDARY: ---------- Focus: 0.00 Air Temp.: 3.1 Alt.: 27.002933 MIGS TONIGHT NOMINAL Axial A 1.5750 1.5390 Axial B 1.0470 1.0440 Axial C 1.1660 1.1590 Trans D -0.2120 -0.2020 GALILS Commanded: 1619145. 1604839. 1528380. -13800. -9950. Actual: 1619188. 1604973. 1528571. -13820. -9964. SETMIR VALUES SecDesOrient: 1257.00 27.97 -10.00 -90.00 257.89 SecOrient: 1256.90 28.00 -10.03 -89.96 257.48 ---=== PROBLEMS IN DETAIL ===---