APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Thursday January 29, 2004 (MJD 53034) ---=== OBSERVING TEAM ===--- Scot Kleinman Atsuko Nitta John Barentine during checkout/startup --- he is our observer! ---=== OBSERVING PLAN ===--- Science! ---=== OBSERVING SUMMARY ===--- o We finished two plates (1357, 1734) and got some signal on two other plates (1512, 1276). o We tried to image after moon set. It took us a long time to get the telescope position offsets enetered correctly. We used not only skippy (which fails when the offset is too large), but also ltMatch skyGang and autoLskip. Seeing was variable anyhow and mostly out of spec with occasional 30m blocks of in-spec seeing. There are some good data, but we are not counting any of these data against the science plan. We got max accl. watcher error during imaging. Every time we moved the telescope, I think, we got max accl. error. o endNight is running. We emailed day staff to take care of the tapes when endNight rejoices. ---=== OBSERVING LOG ===--- Night ====== We rebooted host and the photo crates in hopes that iop will not be so slow in starting (as it was last night) nor that the teamster will abandon us during the night. Cart 1 Plate 1512 (merged) ---------------------- Photometric but very moony tonight. We start with spectro. The gStars were 10" East again (offsetADR 10 0 0). During preCalib, neither the flat nor arc exposure was read out. The traceback for this error is in the PROBLEM section. Dropping and reGrabbing the instruments solved the problem. Despite the 70-90% effeciency, b1 did not get S/N^2>=2 on the first exposure probably because the moon is very bright and we are pointing close to it. We got two good exposures and are now half way done with this plate. DIMM ------ The dome cover only opened up only to the vertical position. I could hear the air hiss noise, but the dome will not move any further.The dome will not obstruct the view of the telescope in this position. We had to adjust the position of Poalris slightly with the handpaddle to bring it to the center of the image. After that, it ran all night long without any problem. u3 ---- We took a long bias (426 frames)m looked at couple u3 frames and one u4 frames to make sure nothing was wrong. Everything looked fine, levels, cosmics, etc. In case you are curious, the pulled frames are in /data/photo/optics on host. Cart 5 Plate 1734 (pri2 survey plate) -------------------------------------- We had to fk5 to find the field. The seeing is about 2" and varying. We are looking at the east and the wind is from the north-east. Sigh. The second exposure did not make it to s/n of 2. :( We finished this plate with 4 good exposures.Upon SoS's recommenation, we got postCalib. Cart 3 Plate 1357 (survey) ----------------------------- gStars on gotoField. ~2"seeing. SoS gave warning on the following -- possibly triggered by the moon? A look at the frames did show anything unusual. sdR-r1-00024866.fit: WARNING: Max sky-residual chi2 = 84.9510 at 8922.01 Ang (ignoring 5577) sdR-r2-00024866.fit: WARNING: Max sky-residual chi2 = 83.1881 at 8917.85 Ang (ignoring 5577) sdR-r1-00024867.fit: WARNING: Max sky-residual chi2 = 149.476 at 8922.01 Ang (ignoring 5577) sdR-r2-00024867.fit: WARNING: Max sky-residual chi2 = 95.5358 at 8917.46 Ang (ignoring 5577) sdR-r1-00024868.fit: WARNING: Max sky-residual chi2 = 111.611 at 8959.55 Ang (ignoring 5577) sdR-r2-00024868.fit: WARNING: Max sky-residual chi2 = 99.8071 at 8960.15 Ang (ignoring 5577) We finished this plate in 3 exposures. Cart 8 Plate 1276 (survey) ----------------------------- We fk5ed to acquire the field. We did not finish this plate. 08:40Z After one good exposure, we decided to switch to the imager since the weather was good, the seeing about 1.5" and the moon was setting. We decided that we should be ready to image right at moonset rather than take two more exposures to finish this plate. This translates 30min more imaging data. Run 4388 26N lam=-68 -------------------- 09:00Z We are ready to go do survey imaging. skippy failed part way running --- it found stars for some of the CCDs, and then failed because of "improper input parameters" followed by a long message. We ran skyGang which showed the observed vs. catalogue offset in arcsec which need to be converted to degrees before offset calibing them (and the alt offset needs to multiplied by -1.0). We then noticed that the skippy at 09:37Z ran successfully. This reported THETAF=0.0574degrees, but mu and nuErrs were small. If the above THETAF is correct, then it needs to be corrected. But this output is based on 5 objects. We doubted this results since it is based on only 5 objects. The following skippy failed. If the offset we issued based on the skyGang reports were correct, skippy should have succeeded. Meanwhile the next ltMatch said that the rotator was off, agreeing with the skippy reults on 5 objects. We did another skyGang and found our offest all in ALT and about twice the amount from what the first skyGang reported. It seems like we needed to issue the negative offset of what skyGang reports in ALT although we can use the value as is for AZ. We checked in an sdssProcedures imagingObserve.htm change which mentions this. The following skippy worked. Our rotator is off (0.1103deg) and muErr=10.4, nuErr=-7.7". We issued offset commands to correct Az, Alt and Rot. 10:18Z We get good skippy on frame 132! muErr=4.9", nuErr=-2.2", Thetaf=-0.00398! Frame 132 Lambda -49.8 Data are good from here! Seeing is in spec according to SoKent. It took us 1.25hr or so to correct telescope position. It is the first time in few years we had to do this. We note that tccMon says that we are in scanning (26,O) instead of (26,N). Usually, tccMon knows if we are on N or S and the command issued was 26N (checked via murmurLog). Is it possible that the reported Az Alt error was actually telescope trying to compensate rotator offset by asking for Az, Alt offsets? 10:33Z Watcher complained about ccd 11,21,31, 41,51 biasL/R and nQuartileL/R The actual values and the plots showed that all were in spec. There was a bias level drop around frame 33 or so according to the watcher plot. This is about 140 frames ago. Maybe watcher is complaining about what happened at frame33? 10:37Z We note that the mu and nuErr are rapidly increasing. Frame 150 lambda=-47.1 Seeing goes from good to acceptable. 10:40Z Frame 164 lambda=-44.9 nuErr=-7.0" according to skippy. Frame 169 lambda-44.2 The seeing is goes from acceptable to bad. 10:54Z Frame 185 lambda=-41.8 nuErr=-10" according to skippy. 11:12Z Watcher complains about ccd45 skyL values. It is at ~317. Around frame 220, the skyL value went about 300 and has been increasing. The watcher plot shows the overall trend of skyL for ccd45 to be the same with ccd44, but the values are higher for ccd45 compared to ccd44. Is this a problem with setting the threshold correctly for individual ccd or a real problem? 11:20Z Frame 235 lambda=-34.4 skippy reported nuErr=-18". So we must stop the run and reslew. Just when the seeing looked like it was going to be survey quality again..... Run 4389 26N lambda=-1 ------------------------ We put in the rotatorOffset we previously entered as object offset directly in TCC as a calib offset before slewing. Maybe this will help in telescope position and tracking? tccMon says we are in 26N this time. The seeing is acceptable from the beginning of this run. The first successful skippy reports muErr=-64" based on 3 objects. There was no "too large to correct" fiducial crossing errors for the slew to this scan and last one. We ran skyGang which reported that we were 500" off in Az! This is incredible. Is it the rotator offset we entered that cause this? Scot looked at the code and found that the offsetRotator's help string says to enter the amount to move in arcsec, but it actually is supposed to be in degrees. Scot used autoLskip to find the rotator offset since skippy won't run. As Scot adjusts the rotator using the negative value of the autoLskip suggested rotator offset, skippy runs successfully but the reported position offsets are based on only 3 objects. autoLskip requesting -0.024 offset in rotator, we adjusted as requested. The next autoLsip then requests 0.017 offset. Is autoLskip output reliable? (We remember from the bad old days that it isn't. We can't even determine for sure - let alone remember - if we should input the output rotator offset or negative it, but the documentation we still have says to use the as-output offset.) Since skippy will not run, we try another skyGang and issue the reuested offsets. 12:07Z The following skippy (on Frame 73) showed that the nuErr is now small (-0.9") but the rotator offset is about the size of the calib offset entered. It also looks like the autoLskip reported rotator offset was totally superfluous. We realized earler we should try putting the specro offsets back in, but since the seeing was quite variable, we decided to spend the time reacquainting ourselves and the documentation with skyGang and other pointing correction aids. We note that we got many max accl. watcher errors after we switched to the imager. Frame 59 lambda=9.2 Seeing goes from good to bad. Frame 83 lambda=12.8 skippy reports we are now good. We note that ltMatch reports that the rotator is not in spec in field 79, but in spec in field 85. Seeing is around 1.3" according to SoKent. Since skippy also says the rotator is OK, we suspect the field 78 ltMatch result is just bogus. Frame 95 lambda=14.6 SoKent reports the seeing is good again. Frame133 lambda=20.5 endDrift The -frames skyGang option is helpful, BTW. endNight is running. ---=== IMAGING RUN SUMMARY ===--- Run Time Stripe Lambda Last Flavor Comments Start End Begin End Frame ------------------------------------------------------------------------- 4386 00:26Z 04:37Z 100 O -155.71 -92.76 434 ignore 4387 08:51Z 08:56Z 100 O -29.11 -27.76 23 bias 4388 09:00Z 11:21Z 26 N -67.30 -33.13 250 science 4389 11:25Z 12:41Z 26 N 1.41 20.58 141 science 4390 12:47Z 13:08Z 100 O 30.02 35.40 50 bias ---=== IMAGING RUN DETAILS ===--- ---=== SKIPPY RESULTS ===--- Run Frame nFrames stars muErr muRms nuErr nuRms rot az el --------------------------------------------------------------------------- 4388 60 4 5 0.300 0.668 0.000 1.816 0.05743 263 45 4388 104 1 11 10.300 0.062 -7.500 0.095 -0.11073 269 46 4388 106 1 17 10.400 0.108 -7.700 0.102 -0.11032 269 46 4388 111 4 105 11.300 0.390 -8.600 0.303 -0.11034 269 46 4388 120 1 17 1.000 0.145 -13.400 0.108 0.00079 271 46 4388 132 1 29 4.900 0.109 -2.200 0.087 -0.00398 272 47 4388 151 2 46 6.700 0.131 -4.800 0.158 -0.00410 274 47 4388 164 4 96 7.300 0.187 -7.000 0.246 -0.00482 275 47 4388 185 1 27 8.400 0.112 -10.000 0.132 -0.00518 278 48 4388 205 1 9 7.700 0.147 -13.100 0.110 -0.00605 280 48 4388 216 4 66 7.500 0.174 -15.100 0.240 -0.00773 281 49 4388 225 1 21 6.600 0.132 -16.300 0.154 -0.00738 282 49 4388 235 1 21 5.900 0.331 -18.000 0.331 -0.00783 283 49 4389 12 1 3 -64.200 2.186 -3.500 1.835 -0.17098 322 81 4389 45 4 3 -5.900 0.149 21.000 1.897 0.04263 326 82 4389 73 1 9 8.400 0.134 -0.900 0.092 0.11436 330 83 4389 83 1 10 7.200 0.089 -1.200 0.079 0.00186 331 83 4389 96 4 45 6.900 0.112 -1.800 0.131 0.00541 332 83 4389 122 4 56 5.700 0.148 -3.200 0.141 0.01572 334 85 ---=== LTMATCH RESULTS ===--- Run Field nFields alt az nGood rowMean rowSig colMean colSig rot ------------------------------------------------------------------------ 4388 37 1 45 279 46 -1.250 0.256 2.918 0.240 -0.00981 4388 37 1 45 279 60 -1.197 0.273 3.123 0.224 -0.01050 4388 37 1 45 279 66 -1.179 0.296 3.121 0.289 -0.01049 4388 37 1 45 279 59 -0.815 0.461 3.227 0.196 -0.01085 4388 37 1 45 279 52 -0.760 0.398 3.250 0.245 -0.01093 4388 81 1 46 273 37 6.009 0.200 26.596 0.273 -0.08942 4388 81 1 46 273 51 5.711 0.163 26.780 0.327 -0.09004 4388 81 1 46 273 51 5.803 0.165 26.598 0.379 -0.08943 4388 81 1 46 273 39 5.699 0.205 26.364 0.205 -0.08864 4388 81 1 46 273 49 5.648 0.186 26.542 0.163 -0.08924 4388 87 1 46 272 39 5.410 0.163 26.616 0.126 -0.08948 4388 87 1 46 272 29 5.295 0.168 26.658 0.146 -0.08963 4388 87 1 46 272 30 5.201 0.157 26.657 0.193 -0.08962 4388 87 1 46 272 33 5.270 0.232 26.678 0.127 -0.08969 4388 87 1 46 272 26 5.341 0.191 26.681 0.127 -0.08970 4388 122 1 47 268 28 9.341 0.089 28.916 0.076 -0.09722 4388 122 1 47 268 29 9.499 0.145 29.016 0.187 -0.09756 4388 122 1 47 268 20 9.725 0.261 28.978 0.132 -0.09743 4388 122 1 47 268 26 9.738 0.207 29.044 0.241 -0.09765 4388 122 1 47 268 28 9.655 0.243 28.871 0.170 -0.09707 4388 141 1 47 266 23 3.051 0.219 -2.377 0.210 0.00799 4388 141 1 47 266 20 2.961 0.247 -2.266 0.232 0.00762 4388 141 1 47 266 22 3.139 0.269 -2.163 0.186 0.00727 4388 141 1 47 266 21 2.873 0.126 -2.271 0.115 0.00764 4388 141 1 47 266 21 2.768 0.279 -2.336 0.166 0.00785 4388 175 1 48 263 21 0.158 0.278 -2.600 0.198 0.00874 4388 175 1 48 263 16 -0.096 0.249 -2.622 0.126 0.00881 4388 175 1 48 263 18 0.178 0.287 -2.646 0.232 0.00889 4388 175 1 48 263 15 -0.140 0.248 -2.810 0.180 0.00945 4388 175 1 48 263 19 -0.221 0.155 -2.601 0.402 0.00874 4388 193 1 48 261 14 -0.582 0.173 -2.845 0.246 0.00956 4388 193 1 48 261 17 -0.335 0.275 -2.683 0.426 0.00902 4388 193 1 48 261 15 -0.359 0.432 -2.764 0.348 0.00929 4388 193 1 48 261 12 -0.137 0.410 -2.677 0.198 0.00900 4388 193 1 48 261 10 -0.621 0.177 -2.615 0.453 0.00879 4388 228 1 49 257 11 -2.560 0.365 -2.108 0.226 0.00709 4388 228 1 49 257 20 -2.718 0.266 -2.005 0.142 0.00674 4388 228 1 49 257 14 -2.835 0.230 -1.885 0.311 0.00634 4388 228 1 49 257 14 -2.913 0.288 -1.676 0.182 0.00564 4388 228 1 49 257 13 -2.931 0.292 -1.688 0.256 0.00568 4389 79 1 83 208 16 -19.324 1.081 -19.145 0.205 0.06437 4389 79 1 83 208 5 -12.786 0.973 -19.057 0.123 0.06407 4389 79 1 83 208 10 -5.323 1.260 -18.736 0.478 0.06299 4389 79 1 83 208 6 3.093 1.151 -18.886 0.222 0.06350 4389 79 1 83 208 13 10.069 0.997 -18.572 0.345 0.06244 4389 85 1 83 208 10 -0.763 0.198 -2.352 0.276 0.00791 4389 85 1 83 208 13 -1.259 0.237 -2.254 0.190 0.00758 4389 85 1 83 208 10 -1.427 0.163 -2.327 0.178 0.00783 4389 85 1 83 208 7 -1.784 0.203 -2.247 0.100 0.00756 4389 85 1 83 208 13 -2.034 0.184 -2.248 0.202 0.00756 4389 118 1 85 205 17 0.225 0.245 -5.884 0.184 0.01978 4389 118 1 85 205 17 -0.259 0.194 -5.583 0.125 0.01877 4389 118 1 85 205 8 -0.914 0.195 -5.638 0.124 0.01895 4389 118 1 85 205 9 -1.336 0.184 -5.514 0.170 0.01854 4389 118 1 85 205 14 -1.877 0.220 -5.612 0.101 0.01887 ---=== SPECTROSCOPY DATA SUMMARY ===--- Summary Checked (y/n):y QA Procedures Done (y/n):y UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 ----- sequence 24849, plate 1512 ------- 6.1 7.6 5.8 9.3 00:13 24849 0.0 bias 01:44 24850 10.0 flat 01:46 24851 2.0 arc 02:10 24852 900.1 target 02:33 24853 1200.1 target 03:08 24854 1800.1 target ----- sequence 24855, plate 1734 ------- 15.1 20.4 15.8 21.4 03:41 24855 10.0 flat 03:44 24856 2.0 arc 04:08 24857 1200.1 target 04:31 24858 1200.1 target 05:04 24859 1800.1 target 05:36 24860 1800.1 target 06:10 24861 1800.1 target 06:13 24862 10.0 flat 06:16 24863 2.0 arc ----- sequence 24864, plate 1357 ------- 18.5 18.5 22.9 20.1 06:27 24864 10.0 flat 06:30 24865 2.0 arc 06:58 24866 1500.1 target 07:26 24867 1500.1 target 07:54 24868 1500.1 target ----- sequence 24869, plate 1276 ------- 5.7 3.7 6.1 5.7 08:10 24869 10.0 flat 08:13 24870 2.0 arc 08:35 24871 1000.1 target ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument Az Alt Rot Scale pos offset pos offset pos offset ------------------------------------------------------------------------------ 01:32Z 1 1512 -3.54 0.0072 57.13 -0.0007 176.96 -0.0026 0.999730 03:48Z 5 1734 115.37 -0.0024 62.49 -0.0005 -84.79 -0.0228 1.000180 06:34Z 3 1357 116.02 -0.0023 63.34 -0.0010 -83.46 -0.0017 1.000130 08:29Z 8 1276 213.37 -0.0277 83.73 0.0019 35.84 0.0072 0.999880 09:44Z imager 273.79 -0.1472 45.54 0.0090 -8.84 0.0000 1.000000 10:01Z imager 270.31 -0.1472 46.16 -0.0108 -9.75 0.0000 1.000000 10:20Z imager 266.68 -0.1501 46.84 -0.0140 -10.58 0.0000 1.000000 10:54Z imager 260.61 -0.1501 48.09 -0.0140 -11.14 0.0000 1.000000 12:11Z imager 208.43 -0.0212 82.93 0.0046 -48.60 0.0040 1.000000 ---=== 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 ------------------------------------------------------------------------------ 01:55Z 1 1512 0.99968 3159 3977 200 -14 56.4 -2.3 2 2 gdr 1.8 06:34Z 3 1357 1.00013 -1284 232 150 116 63.3 -1.7 9 355 gdr 2.0" 08:29Z 8 1276 0.99988 1185 2296 200 213 83.8 -1.9 12 26 gdr 1.5 10:54Z imager 1.00000 0 -127 -50 261 48.1 -2.3 11 20 12:17Z imager 1.00000 0 -211 -62 207 83.4 -2.4 17 360 ccd23 1.3 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 00:00Z 30 11 2 274 (W) -9999 - 00:31Z 29 11 4 323 (NW) -9999 - 01:04Z 28 11 2 312 (NW) -9999 - 01:34Z 28 11 7 12 (NNE) -9999 - 02:08Z 28 11 10 8 (N) -9999 - 02:41Z 28 10 10 5 (N) -9999 - 03:14Z 28 11 9 9 (N) -9999 - 03:45Z 28 11 11 21 (NNE) -9999 - 04:18Z 28 11 9 28 (NNE) -9999 - 04:51Z 28 10 7 22 (NNE) -9999 - 05:23Z 28 10 10 342 (NNW) -9999 - 05:53Z 28 9 11 329 (NNW) -9999 - 06:24Z 29 8 7 316 (NW) -9999 - 06:55Z 29 7 8 348 (NNW) -9999 - 07:28Z 28 7 10 344 (NNW) -9999 - 08:00Z 28 7 7 11 (N) -9999 - 08:30Z 28 7 14 356 (NNW) -9999 - 09:01Z 28 7 10 11 (N) -9999 - 09:32Z 28 7 14 9 (N) -9999 - 10:02Z 27 7 11 5 (N) -9999 - 10:32Z 27 9 18 16 (NNE) -9999 - 11:04Z 27 13 14 22 (NNE) -9999 - 11:35Z 26 14 11 26 (NNE) -9999 - 12:05Z 27 13 10 18 (NNE) -9999 - 12:35Z 27 15 12 19 (NNE) -9999 - 13:07Z 27 15 10 3 (N) -9999 - ---=== TELESCOPE STATUS ===--- 00:15Z Enclosure fans on and doors cracked. around 00:45Z Enclosure open ---=== 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 0.5490 0.5420 Axial B 0.6430 0.6390 Axial C 1.0800 1.0900 Trans D -8.4560 -8.4610 Lateral E 10.8712 10.8966 Lateral F 10.8458 10.8712 GALILS Commanded: 4600. -2850. 850. -9250. 18400. 17850. Actual: 4600. -2866. 866. -9275. 18411. 17825. 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.: -1.3 Alt.: 30.177439 MIGS TONIGHT NOMINAL Axial A 1.5100 1.5160 Axial B 1.1030 1.1180 Axial C 1.1150 1.1210 Trans D 0.0150 -0.0050 GALILS Commanded: 1628543. 1548462. 1574030. -3900. -8750. Actual: 1628641. 1548187. 1574504. -3899. -8726. SETMIR VALUES SecDesOrient: 1257.00 0.00 -25.00 0.00 146.27 SecOrient: 1256.92 0.22 -24.93 0.31 146.42 ---=== PROBLEMS IN DETAIL ===--- TPM error =========== dewar (Imager Dewar Scale Communications Fault:: 2004-01-30 00:20:22Z) ca (Channel Access Failure: TPM Down?: 2004-01-30 00:13:38Z) m2 mig (Communications Fault: 2004-01-30 01:08:02Z) m2 temp (Excessive Front-Back Temperature Differential: 2004-01-30 01:44:11Z) MSC errors ========== Over 400 misc. errors in watcher -- prbably all of them are about PLC version mismatch complain. preCalib failure =================== The preCalib for the first cart of the night failed. The TB gave the following message. The second failed also. We dropped and regrabbed the instrument and the third preCalib was successful. sp2: list element in quotes followed by ":" instead of space invoked from within "camHandler" invoked from within "if {([exposureRemaining -quiet] == 0 && [statusGet daqBusy] ==0)} { # echo "Idle camHandler" camHandler return }" (procedure "camHandler_maybe" line 12) invoked from within "camHandler_maybe 60" ("eval" body line 1) invoked from within "eval $procname $args" camHandler_maybe is scheduled, further errors sent to murmur 2004-01-30 01:36:34Z: registered (addr11) listener sdsshost:observer:2152 Max accl errors ==================== azimuth (addoffset: Max accl. for azimuth exceeded: 265/1000 (2004-01-30 08:02:56Z sdssmcp): 2004-01-30 08:03:15Z ) rotator (addoffset: Max accl. for rotator exceeded: -279/1000 (2004-01-30 08:02:56Z sdssmcp): 2004-01-30 08:03:15Z ) azimuth (addoffset: Max accl. for azimuth exceeded: 256/1000 (2004-01-30 09:12:28Z sdssmcp): 2004-01-30 09:12:34Z ) altitude (addoffset: Max accl. for altitude exceeded: 126/1000 (2004-01-30 09:56:35Z sdssmcp): 2004-01-30 09:57:03Z ) azimuth (addoffset: Max accl. for azimuth exceeded: -732/1000 (2004-01-30 09:42:04Z sdssmcp): 2004-01-30 09:42:15Z ) rotator (addoffset: Max accl. for rotator exceeded: 392/1000 (2004-01-30 10:04:11Z sdssmcp): 2004-01-30 10:04:27Z ) rotator (addoffset: Max accl. for rotator exceeded: 392/1000 (2004-01-30 11:22:10Z sdssmcp): 2004-01-30 11:22:31Z ) azimuth (addoffset: Max accl. for azimuth exceeded: -1374/1000 (2004-01-30 12:03:21Z sdssmcp): 2004-01-30 12:03:30Z ) altitude (addoffset: Max accl. for altitude exceeded: 172/1000 (2004-01-30 12:03:21Z sdssmcp): 2004-01-30 12:03:30Z ) rotator (addoffset: Max accl. for rotator exceeded: -406/1000 (2004-01-30 12:09:23Z sdssmcp): 2004-01-30 12:09:40Z ) rotator (correction for rotator 800529 is too large (2004-01-30 12:52:33Z sdssmcp): 2004-01-30 12:52:53Z ) nQuartile errors ==================== We saw this error for ccd 11,21,31,41,51 and 25,26. sky level errors ==================== skyL (11:02:02Z 2004-01-30 ccd45:)