APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Monday September 17, 2001 (MJD 52170) ---=== OBSERVING TEAM ===--- Atsuko Nitta Kleinman Steph Snedden (of the stuffed-up nose) Swinging Mike Harvanek Gretchen VanDoren Bruce Gillespie Russell Owen - by phone French Leger - by phone Jon Brinkmann - by phone Visitors: Nicole Spohn (German TV) Rainer Bauer (German TV) ---=== OBSERVING PLAN ===--- Science! It looks like imaging tonight. ---=== OBSERVING SUMMARY ===--- A photometric night. Finished stripe 76 S. Did part of 82 N before clouds came in, and got a BD calibration scan (under photometric conditions and good seeing). Had various problems that impacted our efficiency somewhat. ---=== OBSERVING LOG ===--- Mounted the imager before sunset, since the clouds were dissipating. German TV film crew on-site during opening. They left at the end of twilight. Camron reported sub arcsec seeing at twilight...everything looked good for imaging. 20:08 - started a drift, but out-of-focus donuts didn't look very good. Tried homing & relaxing the primary. Started a new drift. Images still looked comatic . We then thought the secondary wasn't moving & called Russell, but while talking to him, we saw that the primary numbers hadn't moved during homing and were out of spec. In fact, the primary was off air. We called French. It turned out that during afternoon checkout, we switched from PMSS dessicant cannister 2 to dessicant cannister 1, but only turned the valve near the cannister labels...not the upper valve as well. We set the valves correctly and labeled the upper valve so hopefully it is now clear that both need to be switched. Imaged stripe 78 S under good seeing...subarcsecond in i' for most of the drift and 'good' throughout, according to son-of-Kent. Details are in the ''imaging details section''. Ended the drift at lambda -176. This stripe is done. 01:35 - We then started 86 S, but it was really too late to start, so we ended the drift right away and went to do JEG's BD calibration. 01:56 - Ended the BD calibration. Here is the info on where the frames are stored: Copying BD17 calib frames --------------------------- After going through headers of r4 frames, I found that frame 21 RA = 333.07910 1st row - Right ascension of telescope boresighDEC = 17.525320 Therefore, we saved, r4 frame 15-23 i4 frame 21-25 u4 frame 17, 19-27 z4 frame 25-29 g4 frame 27-31 in /data/photo/optics/52170 with original file names. It is rather tedious to do getFrame and then look through the headeers for the right RA and DEC so that we know which frames to copy over. (In r4, the RA DEC closest to BD17's coordinate was in frame 21 instead of frame 17.) We will file a PR asking if we can get this done easier. 02:00 - Went to 82 N. Got out-of-focus donuts for jeg. Had a spontaneous rotator abort. This caused us to run past our ramp-up lambda, so we backed up & started again. Here is the info on where the donut frames are stored: The collimation looks good from the donuts. Donuts are saved also in /data/photo/optics/52170. Frame 10 --> + out of focus images Frame 14 --> - out of focus images We were going to redo the donuts so that we have precisely +/- out of focus images at the end of the last science, but we forgot to do so. We were not as precise in going symmetrically out-of-focus on both sides of the focus in the above frames. 03:10 - beginning of science on 82 N. 04:00 - We lost communications with sp 1. See the problems section. 04:30 - small clouds started to encroach on the area we were scanning. We kept going, since it was too late to change instruments and start spectroscopy, but we probably need to redo this stripe starting at lambda -145. 05:40 - ended the drift 06:45 - enclosure closed & telescope stowed. Imager in doghouse. ---=== IMAGING RUN SUMMARY ===--- Run Stripe Flavor Lambda Last Begin End Frame Comments ------------------------------------------------------------------ 2561 100 O ignore 40.23 45.73 51 doghouse bias 2562 100 O bias 95.48 97.70 29 2563 76 S ignore 129.45 130.26 19 2564 76 S ignore 129.43 132.91 37 2565 76 S ignore 129.65 130.52 20 2566 76 S science 129.58 -175.71 379 2567 86 S ignore 137.73 138.47 17 2568 86 S calibration 146.04 145.71 39 BD 17 Calibration 2569 82 N engineering 168.75 171.32 31 2570 82 N science -167.55 -125.01 355 ---=== IMAGING RUN DETAILS ===--- Stripe 78 S - Run 2566 ----------- Focus & skippy good by frame 55. lambda 136.78 Start of Science at lambda 138. End of science at lambda -17 Stripe 82 N - Run 2569 ----------- 02:00 - Started 82 S, but at incorrect lambda. Stayed here long enough to get out-of-focus donuts for JEG. Had to clear rotator offsets from BD calibration scan. Frames 9-10 are +300 out of focus Frame 14 is -300 out of focus. Stripe 82 N - Run 2570 ----------- 02:15 - setting up - rotator & focus tweaks. During skippy, we saw the rotator had aborted. This happened at 02:23. This delay caused us to run past our ramp- up time. We backed up so that we could start science at the right lambda. 03:10 - ramp-up to science at frame 100. 03:20 - frame 114 - start of science. 04:30 - frame approx. 215, lambda -145, no longer photometric...will need to redo the stripe from lambda=-145. 05:40 - frame 347, lambda -125 ended drift. ---=== SKIPPY RESULTS ===--- Run Frame nFrames stars muErr muRms nuErr nuRms rot --------------------------------------------------------------- 2566 26 4 102 -14.300 0.144 -6.300 0.514 -0.01431 2566 35 4 94 -14.700 0.621 -6.400 0.528 -0.01319 2566 36 4 90 -14.800 0.447 -6.500 0.151 -0.01311 2566 60 4 105 -14.600 0.119 -6.800 0.134 -0.02755 2566 60 4 105 -14.600 0.119 -6.800 0.134 -0.02755 2566 60 4 105 -14.600 0.119 -6.800 0.134 -0.02755 2566 112 4 99 -14.100 0.128 -7.100 0.100 -0.02670 2566 190 4 82 -13.500 0.281 -7.500 0.253 -0.02596 2566 223 4 63 -11.800 0.370 -7.500 0.283 -0.02639 2566 257 4 59 -13.100 0.661 -7.800 0.583 -0.02611 2566 294 4 58 -11.300 0.108 -8.000 0.097 -0.02595 2566 328 4 73 -9.300 0.159 -7.700 0.871 -0.02488 2566 361 4 51 -10.700 0.126 -7.900 0.105 -0.02621 2570 42 4 17 -16.500 0.086 -9.700 0.077 -0.22396 2570 54 4 19 -15.900 0.318 -10.000 0.086 -0.22827 2570 61 1 17 -16.500 0.086 -9.700 0.077 -0.22396 2570 61 1 11 -15.700 0.604 -10.200 0.229 -0.22983 2570 85 1 11 -15.700 0.604 -10.200 0.229 -0.22983 2570 87 1 13 -14.200 0.105 -10.800 0.101 -0.01380 2570 87 1 13 -14.200 0.105 -10.800 0.101 -0.01380 2570 88 4 52 -14.100 0.158 -10.700 0.093 -0.01355 2570 122 4 45 -15.900 0.162 -10.600 0.100 -0.01366 2570 156 4 44 -17.400 0.153 -10.500 0.122 -0.01374 2570 193 4 60 -15.800 0.743 -10.600 0.571 -0.01297 2570 227 4 56 -16.000 0.147 -10.600 0.114 -0.01356 2570 261 4 58 -16.100 0.564 -10.800 0.562 -0.01331 2570 295 4 56 -14.700 0.124 -11.000 0.122 -0.01363 2570 329 4 44 -15.900 0.238 -10.900 0.194 -0.01337 2570 344 4 33 -16.700 0.142 -10.800 0.113 -0.01314 2570 344 4 33 -16.700 0.142 -10.800 0.113 -0.01314 2570 344 4 33 -16.700 0.142 -10.800 0.113 -0.01314 2570 344 4 33 -16.700 0.142 -10.800 0.113 -0.01314 2570 344 4 33 -16.700 0.142 -10.800 0.113 -0.01314 ---=== LTMATCH RESULTS ===--- Run Field nFields nGood rowMean rowSig colMean colSig rot --------------------------------------------------------------- 2566 47 1 57 0.735 0.746 7.232 7.236 -0.02431 2566 47 1 65 0.992 0.999 7.388 7.394 -0.02484 2566 47 1 71 1.090 1.096 7.348 7.353 -0.02470 2566 47 1 76 1.246 1.250 7.364 7.369 -0.02476 2566 47 1 56 1.267 1.272 7.234 7.240 -0.02432 2566 53 1 72 0.954 0.977 7.550 7.555 -0.02538 2566 53 1 71 1.136 1.145 7.478 7.481 -0.02514 2566 53 1 72 1.216 1.231 7.521 7.530 -0.02529 2566 53 1 60 1.253 1.264 7.606 7.612 -0.02557 2566 53 1 59 1.468 1.485 7.840 7.845 -0.02636 2566 53 1 72 0.954 0.977 7.550 7.555 -0.02538 2566 53 1 71 1.136 1.145 7.478 7.481 -0.02514 2566 53 1 72 1.216 1.231 7.521 7.530 -0.02529 2566 53 1 60 1.253 1.264 7.606 7.612 -0.02557 2566 53 1 59 1.468 1.485 7.840 7.845 -0.02636 2566 199 1 28 1.089 1.098 7.287 7.288 -0.02450 2566 199 1 44 1.261 1.265 7.338 7.339 -0.02467 2566 199 1 26 1.376 1.384 7.420 7.422 -0.02495 2566 199 1 37 1.429 1.436 7.561 7.565 -0.02542 2566 199 1 34 1.443 1.448 7.452 7.453 -0.02505 2566 233 1 26 0.834 0.838 7.324 7.327 -0.02462 2566 233 1 30 1.010 1.014 7.351 7.352 -0.02472 2566 233 1 27 1.156 1.164 7.447 7.449 -0.02504 2566 233 1 23 1.150 1.157 7.401 7.403 -0.02488 2566 233 1 30 1.247 1.251 7.439 7.440 -0.02501 2566 269 1 22 0.856 0.863 8.047 8.049 -0.02705 2566 269 1 16 1.040 1.049 7.905 7.907 -0.02658 2566 269 1 21 1.154 1.161 7.922 7.923 -0.02663 2566 269 1 25 1.221 1.228 8.148 8.149 -0.02739 2566 269 1 30 1.314 1.320 8.323 8.325 -0.02798 2566 304 1 24 1.437 1.444 7.522 7.524 -0.02529 2566 304 1 19 1.701 1.707 7.524 7.527 -0.02530 2566 304 1 19 1.646 1.657 7.435 7.436 -0.02500 2566 304 1 15 1.861 1.870 7.557 7.561 -0.02541 2566 304 1 21 1.896 1.905 7.524 7.529 -0.02530 2566 337 1 13 1.000 1.005 7.834 7.837 -0.02634 2566 337 1 13 1.147 1.153 7.928 7.929 -0.02666 2566 337 1 23 1.272 1.286 7.766 7.777 -0.02611 2566 337 1 20 1.264 1.275 7.729 7.735 -0.02598 2566 337 1 24 1.383 1.391 7.803 7.807 -0.02624 2570 98 1 17 1.427 1.428 3.996 3.999 -0.01343 2570 98 1 17 1.107 1.110 3.859 3.861 -0.01298 2570 98 1 17 0.923 0.930 3.801 3.811 -0.01278 2570 98 1 23 0.545 0.561 3.982 3.984 -0.01339 2570 98 1 10 0.101 0.182 3.918 3.924 -0.01317 2570 132 1 21 1.484 1.489 3.885 3.889 -0.01306 2570 132 1 21 1.335 1.340 3.830 3.835 -0.01288 2570 132 1 15 0.981 0.990 3.890 3.893 -0.01308 2570 132 1 12 0.655 0.661 3.896 3.898 -0.01310 2570 132 1 21 0.278 0.314 4.031 4.034 -0.01355 2570 165 1 16 1.495 1.498 4.116 4.121 -0.01384 2570 165 1 15 1.270 1.276 3.938 3.941 -0.01324 2570 165 1 14 0.892 0.914 3.831 3.844 -0.01288 2570 165 1 19 0.531 0.551 3.951 3.957 -0.01328 2570 165 1 11 0.126 0.189 3.815 3.826 -0.01283 2570 203 1 14 1.862 1.870 3.859 3.863 -0.01298 2570 203 1 23 1.598 1.609 3.830 3.836 -0.01288 2570 203 1 15 1.132 1.150 3.675 3.685 -0.01236 2570 203 1 9 0.863 0.872 4.051 4.056 -0.01362 2570 203 1 20 0.446 0.488 3.974 3.976 -0.01336 2570 237 1 8 1.584 1.599 4.077 4.082 -0.01371 2570 237 1 19 1.218 1.232 4.097 4.100 -0.01378 2570 237 1 12 0.816 0.845 4.199 4.203 -0.01412 2570 237 1 19 0.420 0.439 4.082 4.098 -0.01372 2570 237 1 15 0.064 0.202 4.259 4.263 -0.01432 2570 271 1 14 1.715 1.720 4.124 4.140 -0.01387 2570 271 1 14 1.482 1.495 4.125 4.138 -0.01387 2570 271 1 17 0.983 0.995 4.100 4.109 -0.01378 2570 271 1 12 0.522 0.551 4.148 4.156 -0.01395 2570 271 1 15 0.016 0.233 3.765 3.771 -0.01266 2570 305 1 9 2.113 2.115 4.395 4.406 -0.01478 2570 305 1 12 2.081 2.098 4.271 4.278 -0.01436 2570 305 1 20 1.675 1.687 4.305 4.316 -0.01447 2570 305 1 9 1.293 1.301 4.241 4.244 -0.01426 2570 305 1 15 0.854 0.878 4.215 4.231 -0.01417 2570 337 1 13 1.754 1.816 3.916 3.950 -0.01317 2570 337 1 10 1.441 1.483 3.930 3.942 -0.01321 2570 337 1 15 1.161 1.235 3.968 3.981 -0.01334 2570 337 1 14 0.582 0.649 4.022 4.027 -0.01352 2570 337 1 10 0.369 0.448 3.928 3.934 -0.01320 2570 337 1 13 1.754 1.816 3.916 3.950 -0.01317 2570 337 1 10 1.441 1.483 3.930 3.942 -0.01321 2570 337 1 15 1.161 1.235 3.968 3.981 -0.01334 2570 337 1 14 0.582 0.649 4.022 4.027 -0.01352 2570 337 1 10 0.369 0.448 3.928 3.934 -0.01320 2570 337 1 13 1.754 1.816 3.916 3.950 -0.01317 2570 337 1 10 1.441 1.483 3.930 3.942 -0.01321 2570 337 1 15 1.161 1.235 3.968 3.981 -0.01334 2570 337 1 14 0.582 0.649 4.022 4.027 -0.01352 2570 337 1 10 0.369 0.448 3.928 3.934 -0.01320 2570 337 1 13 1.754 1.816 3.916 3.950 -0.01317 2570 337 1 10 1.441 1.483 3.930 3.942 -0.01321 2570 337 1 15 1.161 1.235 3.968 3.981 -0.01334 2570 337 1 14 0.582 0.649 4.022 4.027 -0.01352 2570 337 1 10 0.369 0.448 3.928 3.934 -0.01320 2570 337 1 13 1.754 1.816 3.916 3.950 -0.01317 2570 337 1 10 1.441 1.483 3.930 3.942 -0.01321 2570 337 1 15 1.161 1.235 3.968 3.981 -0.01334 2570 337 1 14 0.582 0.649 4.022 4.027 -0.01352 2570 337 1 10 0.369 0.448 3.928 3.934 -0.01320 2570 337 1 13 1.754 1.816 3.916 3.950 -0.01317 2570 337 1 10 1.441 1.483 3.930 3.942 -0.01321 2570 337 1 15 1.161 1.235 3.968 3.981 -0.01334 2570 337 1 14 0.582 0.649 4.022 4.027 -0.01352 2570 337 1 10 0.369 0.448 3.928 3.934 -0.01320 ---=== SPECTROSCOPY DATA SUMMARY ===--- UT Exp Time flavor comment (S/N)^2 totals ========================================== b1 r1 b2 r2 23:00 10928 0.0 bias {{}} 23:00 10928 0.0 bias {{}} 23:00 10928 0.0 bias {{}} 23:00 10928 0.0 bias {{}} ---=== TELESCOPE OFFSETS AND SCALE I ===--- Time Instrument getclock Az Alt Rot Scale ------------------------------------------------------------------------------ 22:14 imager 1000786449 0.000000 0.000000 0.000000 1.000000 ---=== TELESCOPE OFFSETS AND SCALE II ===--- ---=== DATA TAPE SUMMARY ===--- Goes: JL4388-4393,4418 Stays: JL4394-4399,4419 ---=== FOCUS LOG ===--- setmir piston Temp Wind Time Inst scale M1 M2 Foc Az Alt (C) MPH Dir filt fwhm ------------------------------------------------------------------------------ 17:20 imager 1.00000 0 1257 0 121 30.0 16.5 6 276 22:00 Lost teamster - estimate seeing in CCD 23 at 0.9 asec 23:00 '' '' '' '' '' '' '' 1.0 asec 23:34 imager 1.00000 0 -697 -428 15 70.2 13.7 11 250 23 0.9 23:50 imager 1.00000 0 -689 -419 15 70.6 13.6 9 250 23 0.9 00:14 imager 1.00000 0 -690 -420 16 71.0 13.6 10 237 23 0.8 00:36 imager 1.00000 0 -693 -422 17 71.2 13.5 6 267 23 1.1 00:59 imager 1.00000 0 -701 -430 18 71.3 13.5 8 272 23 1.1 01:26 imager 1.00000 0 -698 -427 18 71.2 13.2 8 302 23 1.0 03:28 imager 1.00000 0 -639 -400 -12 56.7 12.7 9 308 23 1.0 03:58 imager 1.00000 0 -642 -403 -12 56.7 12.7 9 343 23 1.2 05:38 imager 1.00000 0 -638 -399 -12 56.7 12.1 7 324 23 1.6 ---=== WEATHER LOG ===--- Wind Time Temp F Dewp F MPH Direction Dust DIMM Sky 16:27 63 45 11 281 (W) 165 - clear 16:59 62 46 7 264 (W) 209 - clear 17:32 62 44 6 271 (W) 194 - clear 18:04 61 44 8 269 (W) 192 - clear 19:16 56 43 6 276 (W) 256 - clear 19:48 57 43 7 269 (W) 240 - clear 20:20 57 44 10 259 (W) 281 - clear 20:52 57 44 9 259 (W) 261 - clear 21:25 57 44 12 234 (SW) 327 - clear 21:57 54 44 12 241 (WSW) 317 - clear 22:30 57 44 12 255 (WSW) 333 - clear 23:02 57 43 10 262 (W) 297 - clear 23:34 56 43 11 249 (WSW) 279 - clear 00:04 56 43 12 243 (WSW) 279 - clear 00:36 56 42 11 272 (W) 292 - clear 01:08 56 42 8 274 (W) 329 - clear 01:40 55 42 8 287 (WNW) 289 - clear 02:12 55 43 8 315 (NW) 262 - clear 02:44 55 42 14 310 (NW) 291 - clear 03:17 54 41 6 275 (W) 228 - clear 03:49 54 42 12 305 (NW) 271 - clear 04:21 54 42 9 334 (NNW) 263 - pcl 04:53 53 41 4 324 (NW) 342 - pcl 05:25 52 42 5 337 (NNW) 320 - pcl 05:58 54 42 9 332 (NNW) 294 - pcl 06:30 54 40 6 313 (NW) 319 - pcl 07:02 53 42 6 348 (NNW) 295 - pcl 07:35 54 41 11 15 (NNE) 260 - pcl ---=== TELESCOPE STATUS ===--- Stowed at 30 deg alt, with no instrument or secondary corrector mounted. Counterweights at lower limit. Spectrograph auto-fill connected. Spectro dewar weight at 07:00 - 67 lb. Imager dewar weight at 07:00 - 144 lb. ---=== SOFTWARE USED ===--- IOP/SOP: v3_56_9 Watcher: v2_10_0 MCP: v5_4_3 TPM: v2_4_1 AstroDa: v14_36 TCC: 2.5.5 ---=== MIRROR NUMBERS ===--- im> Time dpTemp dewPt Press TmpOut HumOut Windd Winds 17:34 64.5 46.0 21.55 51 270.6 6.9 18 PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A: -5.0680 0.0710 Axial B: -3.9170 -0.0980 Axial C: -2.4360 0.0610 Trans D: -0.4850 4.1800 Lateral E: 1.8960 1.9365 Lateral F: 0.4245 0.4370 GALILS Commanded: 5377. -3699. 923. -208. 31535. 30647. Actual: 5400. -3700. 900. -200. 31550. 30650. SETMIR VALUES primDesOrient: 0.00 -11.80 23.00 1256.90 642.10 primOrient: 0.00 -12.16 22.81 1257.41 642.19 SECONDARY: ---------- Focus: 0.0 Air temp: 18.1 C Altitude: 30.00 MIGS TONIGHT NOMINAL Axial A: -1.2940 -1.2900 Axial B: -1.2990 -1.3150 Axial C: -1.3140 -1.3060 Trans D: 0.1440 0.1890 GALILS Commanded: 1583837. 1583837. 1583837. 2595. 3795. Actual: 1583851. 1583851. 1583857. 2600. 3800. SETMIR VALUES secDesOrient: 1257.00 0.00 0.00 0.00 -175.00 secOrient: 1257.01 0.00 0.00 0.00 -175.12 ---=== PROBLEMS IN DETAIL ===--- TCC: ---- We had a recurrence of the mailbox full problem during afternoon checkout. A telstop & telrun blew the TCC's nose. Here are the error messages. im> Timed out waiting for the TCC to respond We are missing: PrimCmdMount PrimActMount PrimOrient SecCmdMount SecActMount SecOrient SecFocus ScaleFac 0 8 : Cmd='mir stat' 0 0 W UserNum=10; MsgsLost=1; Text=''user mailbox full; no more errors reported for this user until output resumes'' 0 0 I TCCStatus=''TTT'',''NNN''; TCCPos=121.00,30.00,0.00; AxePos=121.00,30.00,0.00 0 0 W AzStat=120.999078, 0.000000, 4507486044.36488, 0x00003800; BadAzStatus; AzDTime=-0.1 0 0 W AltStat=29.999413, 0.000000, 4507486044.51234, 0x00003800; BadAltStatus; AltDTime=-0.1 0 0 W RotStat=-0.000231, 0.000000, 4507486044.67249, 0x00003800; BadRotStatus; RotDTime=-0.1; RotID=1, 0 getclock: 1000769231 ---------- On a separate issue...Russell, what is the meaning of the following warning message about the az wrap? It caused no problems for us..we did not have a wrap problem. 0 7 W Text=''/Tel1Wrap is deprecated; please switch to using /AzWrap as soon as you can'' 0 7 > Started; Cmd='track 313.03220870,9.37410740 FK5 /rotty=obj /rota=0 /rotwrap=MID /tel1wrap=MID /ScanVelocity=(0.004 0903284968392059,0.00085175214284739353) /Name=''stripe 76-S'' /Keep=(Boresight)' IOP: ---- We had a permissions problem with the focus .par file: im> startFocusLoop -pause Error: couldn't open ''/astrolog/52170/focus-52170.par'': Permission denied We manually changed the permission. A PR was filed. PMSS: ----- Cannister 2 dessicant is pink. We switched the valve to cannister 1. This caused a problem with the PMSS, that was an operator error. Only the lower valve was switched over. The upper valve had no label, so was not switched over. This caused the primary to go off air. After phone calls to Russell and French, we realized what had happened. We made new labels for the second valve! TEAMSTER DIED: -------------- During our first drift, the teamster died at frame 64. teamster -force was issued, and that got things going again. SP1: ---- SP1 stopped communicating with us: Watcher said: no reply (LN2STAT: Sep 18 03:59:16 MDT) no reply (CAMSTAT: Sep 18 04:22:03 MDT) From the murmur log: Sep 18 04:52:15 sdsshost IDA 283077 TEXTONLY CAMERA sp1: FAILURE on ftelnet t -g-sdss-2.apo.nmsu.edu 2100: connection error in ftelnet: connection refused Sep 18 04:52:17 sdsshost IOP 259402 TEXTONLY CAMERA: Bad status from sp1 camera micro. Wanted '' '' Returning '''' Sep 18 04:52:22 sdsshost IOP 259402 TEXTONLY sp1: appending to idCCDLog parameter files Sep 18 04:54:42 sdsshost IOP 259402 TEXTONLY CAMERA: Bad status from sp1 camera micro. Wanted '' '' Returning '''' We power cycled spectro 1 four times, jiggled cables and checked the MUX's. Note that although the port 1 connection was refused, it was available according to ''show port all'', so the problem is apparently at the camera end. We called Jon. He asked that we swap the serial cables at the rotator MUX to see if the problem then switched over to sp 2. We did so, and indeed, sp 2 then complained. We next switched the serial cables back, and reseated the sp1 serial cable at the spectrograph. We power-cycled again, and the connection was re-established. It could have been the power-cycling that did it, but we really suspect the serial cable connection, since we had power cycled at least 4 times before with no results. A PR was filed to have the connector cleaned.