APACHE POINT OBSERVATORY SDSS 2.5M OBSERVING LOG Sunday April 19, 2026 (SJD 61150) ---- Observing Team ---- Dan Oravetz ---- Observing Plan ---- Sun 19 Apr 2026 61150 dark (8.5 h) plus 1.1 h for 8 deg design ---- Observing Summary ---- Weather kept us closed tonight. Only a few raindrops actually fell on site around sunset, but a thunderstorm to the west kept clouds and associated radar returns around and on top of us for the first half of the night. When that moved out, in its wake were very low clouds that clouded us out and the humidity steadily increased, reaching ~90% just before 10:00Z. The combination of low clouds and high humidity kept us closed through the end of the night. ---- Observing Log ---- ============================================================================ AFTERNOON CHECKOUT ============================================================================ All systems alive and responsive. Restarted cherno. Disk space: Filesystem Size Used Avail Use% Mounted on /dev/sdb1 2.0T 498G 1.6T 25% /home /dev/sdd1 22T 14T 7.1T 67% /data FPS powered on. Positioners are home/folded: 21:39:08 APO.doravetz 50 jaeger i folded=T 21:39:08 APO.doravetz 50 jaeger : text="All positioners are folded." 21:39:28 APO.doravetz 51 jaeger : permanently_disabled=647,986; manually_disabled=572,973,1039 Loaded a manual folded configuration: 21:39:58 CmdStarted: APO.doravetz 53 jaeger configuration load --from-positions 21:40:00 APO.doravetz 53 jaeger d text="Resetting cherno offsets." 21:40:00 APO.doravetz 53 jaeger d text="Focal plane scale: 1.0." 21:40:00 APO.doravetz 53 jaeger d configuration_loaded=26171,-999,-999,-999.0,-999.0,0,-999.0,-999.0,/home/sdss5/software/sdsscore/main/apo/summary_files/026XXX/0261XX/confSummary-26171.par,F 21:40:04 APO.doravetz 53 jaeger i configuration_snapshot=/data/logs/jaeger/configuration_snapshots/61150/configuration_snapshot_61150_26171.pdf 21:40:04 APO.doravetz 53 jaeger d design_preloaded=-999 21:40:04 APO.doravetz 53 jaeger : text="Configuration 26171 loaded." 21:40:05 CmdDone: APO.doravetz 53 jaeger configuration load --from-positions Took a '--no-apply' FVC image: 21:40:54 FVC Loop fvc_rms= 36.86 fvc_deltarms= 5.13 fvc_filename=/data/fcam/61150/fimg-fvc1n-0001.fits fvc_perc_90= 54.00 fvc_percent_reached= 2.40 fvc iterations= 1 Scattered-light check: 21:41:15 CmdStarted: APO.doravetz 55 fliswarm talk -n fvc expose 50 No evidence of light artifacts. GFA biases, darks, and flat: 21:44:25 CmdStarted: APO.doravetz 60 fliswarm talk -c gfa expose --bias --count 10 21:45:23 CmdStarted: APO.doravetz 61 fliswarm talk -c gfa expose --dark --count 5 5 21:46:26 CmdStarted: APO.doravetz 63 fliswarm talk -c gfa expose --flat 1 Exercised positioners: 21:46:49 CmdStarted: APO.doravetz 65 jaeger configuration random --danger 21:47:56 .jaeger 0 jaeger e text="A collision was detected in positioner 1140. Sending SEND_TRAJECTORY_ABORT and locking the FPS." 21:47:56 .jaeger 0 jaeger w text="Locking the FPS. (JaegerUserWarning)" 21:47:56 .jaeger 0 jaeger i fps_status=0x14 21:47:57 .jaeger 0 jaeger e locked=T; locked_by=1140; locked_axes=alpha; locked_alpha=10.003394410014153; locked_beta=170.01441478729248 Issued an 'unlock', 'explode 10', and an 'unwind' then tried again. 21:49:32 CmdStarted: APO.doravetz 70 jaeger configuration random --danger 21:51:00 APO.doravetz 70 jaeger d trajectory_dump_file=/data/logs/jaeger/trajectories/61150/trajectory-61150-0004.json 21:51:00 CmdDone: APO.doravetz 70 jaeger configuration random --danger 21:51:05 .jaeger 0 jaeger i snapshot=/data/logs/jaeger/snapshots/61149/fps_snapshot_61149_0067.pdf 21:51:37 CmdStarted: APO.doravetz 71 jaeger configuration reverse BOSS hartmanns, arc, flat: 21:55:02 BOSS expNum=400165, expTime= 4.0s 21:55:43 BOSS expNum=400166, expTime= 4.0s 21:56:24 sp1.motor.move= 23, 25, 21 21:56:24 Hartmann collimate output sp1: offset: r= -659 (In Focus); b= -2.2 (In Focus) sp1: pred. move: spAverageMove= 24 sp1: pred. resid: r= -683, b= -2.1, txt= OK, spTemp = 4.6 21:56:42 BOSS expNum=400167, expTime= 4.0s 21:58:19 BOSS expNum=400168, expTime= 25.0s Ventilation delayed due to weather; cloudy with a few intermittent drizzly raindrops. ============================================================================ NIGHT ============================================================================ Did not open at sunset due to weather. A small thunderstorm developed to the west near Las Cruces and has ballooned to the east. We have radar and clouds around and on top of us. The storm moved north and the radar is moving out of the county, but we have waves of low clouds materializing and we are clouded out. The humidity is increasing as well. 09:15Z - The sky is clear, but humidity is too high. 09:51Z - Dewpoint depression down to 1.8C. 10:07Z - Clouded-out again and humidity ~90%. 10:42Z - Called it a night. Too humid still (90%) and low clouds clouding us out. FPS powered-off. Positioners are homed/folded. APOGEE morning cals started. ---- Mirror Numbers ---- PRIMARY: -------- Scale: 1.000000 MIGS TONIGHT NOMINAL Axial A: 0.0020 0.0050 Axial B: -0.0310 -0.0270 Axial C: -0.1810 -0.1760 Trans D: -0.0250 -0.0200 Lateral E: 0.3400 0.3400 Lateral F: 0.5480 0.5475 GALILS Commanded: 8450 -1050 8800 22100 -2000 -1700 Actual: 8450 -1050 8800 22100 -2000 -1700 SETMIR VALUES PrimDesOrient: 0.0 2.03 16.67 -410.97 -787.67 PrimOrient: 1.06 2.03 16.67 -410.97 -787.67 SECONDARY: ---------- Focus: 0.0000 Air temp: 0.00 Altitude: 30.0 MIGS TONIGHT NOMINAL Axial A: -7.6390 -7.6400 Axial B: -7.5350 -7.5330 Axial C: -7.5260 -7.5280 Trans D: 0.2000 0.1940 GALILS Commanded: 2250600 2250650 2244700 -1750 -1700 Actual: 2215408 2225449 2199622 -1750 -1700 SETMIR VALUES SecDesOrient: 1757.0 7.9 1.5 -39.3 35.42 SecOrient: 1756.94 7.78 1.58 -39.25 35.26 ---- Telescope Status ---- Status at: 10:53Z Telescope stowed at: 121.0, 30.0, 0.0 mount Instrument mounted: FPS Counterweights at: manually adjusted for telescope balanced w/ FPS mounted LN2 autofill systems: Connected and turned on 180L LN2 dewar scales: SP1 175 lbs, 25 psi FPS Status ========== CP10 Loop = 7.42 L/min GFA Loop = 2.45 L/min Supply pressure = 44.8 psi Return pressure = 29.7 psi Chiller Status ============== Set temperarature = 7.9 C Flow = 4.9 Gpm ---- Software Used ---- STUI : 1.7.21 alerts : 2.3.0 boss : 6.0.5a1 -boss.specMec : 3.0.4 apo : 4.1.0 fliswarm : 0.6.0 jaeger : 1.11.0 kaiju : 1.4.1 coordio : 1.18.1 fps_calibrati : 2025.12.04 cherno : 1.1.0 astrometrynet : 0.93 hal : 1.4.1 hartmann : 2.0.2 hub : 5.0.1a0 mcp : 2.3.1 -mcp.plc : 35 -mcp.azFiduci : v1_153 -mcp.altFiduc : v1_153 -mcp.rotFiduc : v1_153 tcc : 1.4.0 apogee : not available apogeecal : not available apogeeql : v1_7_0dev boson : 0.6.0 sdss-obstools : 3.9.3 TPM : 1.2-31-gd7eb MCP : 2.3.1 PLC : V35 Fiducials : v1_153 idlspec2d : v6_2_1 Kronos : 2.1.0a roboscheduler : 2.1.0 ---- APOGEE Data Summary ---- 61149 morning cals: num field design config exptype dithpix nread relflux okay dx dy sigx sigy fpi1 fpi2 -------- ------ ------ ------ ------------ ------- ----- ------- ----- ------- ------- ------ ------ ---- ---- 55870090 100486 752473 26169 DARK 13.5 60 -8 True -- -- -- -- -- -- 55870091 100486 752473 26169 DARK 13.5 60 7 True -- -- -- -- -- -- 55870092 100486 752473 26169 DARK 13.5 60 8 True -- -- -- -- -- -- 55870093 100486 752473 26169 QUARTZFLAT 13.5 10 113 True -- 0.76 -- 0.87 -- -- 55870094 100486 752473 26169 QUARTZFLAT 13.5 10 114 True -- 0.76 -- 0.86 -- -- 55870095 100486 752473 26169 QUARTZFLAT 13.5 10 114 True -- 0.75 -- 0.86 -- -- 55870096 100486 752473 26169 ARCLAMP-THAR 13.5 12 1 True -3.39 -5.19 1.27 0.88 -- -- 55870097 100486 752473 26169 ARCLAMP-UNE 13.5 40 3 True -9.34 -4.92 1.19 0.96 -- -- 55870098 100486 752473 26169 ARCLAMP-THAR 13.0 12 1 True -4.01 -5.05 1.09 0.71 -- -- 55870099 100486 752473 26169 ARCLAMP-UNE 13.0 40 2 True -9.56 -5.03 0.38 0.87 -- -- 55870100 100486 752473 26169 DARK 13.0 30 10 False -- -- -- -- -- -- 55870101 100486 752473 26169 INTERNALFLAT 13.0 30 95 True -- -- -- -- -- -- 55870102 100486 752473 26169 INTERNALFLAT 13.0 30 96 True -- -- -- -- -- -- 55870103 100486 752473 26169 INTERNALFLAT 13.0 30 96 True -- -- -- -- -- -- 55870104 100486 752473 26169 DARK 13.0 30 240 True -- -- -- -- -- -- 55870105 100486 752473 26169 FPI 13.0 30 250 True -13.09 -5.04 1.14 0.91 -- -- 55870106 100486 752473 26169 FPI 13.5 30 249 True -0.23 -5.02 1.10 0.89 -- -- num exptype nread mtp1 mtp2 mtp3 mtp4 mtp5 mtp6 mtp7 mtp8 mtp9 mtp10 -------- ---------- ----- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----- 55870093 QUARTZFLAT 10 74 78 88 99 99 93 94 98 98 90 55870094 QUARTZFLAT 10 77 81 89 100 100 94 95 98 98 91 55870095 QUARTZFLAT 10 77 82 90 100 100 94 95 98 99 92 (observers39) [observer@sdss5-hub: ~]$ check_ap 61150 num field design config exptype dithpix nread relflux okay dx dy sigx sigy fpi1 fpi2 -------- ------ ------ ------ ------------ ------- ----- ------- ---- ------- ------- ------ ------ ---- ---- 55880001 100486 752473 26169 DARK 13.5 3 133 True -- -- -- -- -- -- 55880002 -999 -999 26171 DARK 13.5 60 -8 True -- -- -- -- -- -- 55880003 -999 -999 26171 QUARTZFLAT 13.5 10 111 True -- 0.67 -- 0.86 -- -- 55880004 -999 -999 26171 ARCLAMP-THAR 13.5 12 1 True -3.33 -5.15 1.32 0.78 -- -- 55880005 -999 -999 26171 ARCLAMP-UNE 13.5 40 3 True -9.16 -4.96 1.06 1.00 -- -- 55880006 -999 -999 26171 ARCLAMP-THAR 13.0 12 1 True -4.15 1.45 1.16 0.75 -- -- 55880007 -999 -999 26171 ARCLAMP-UNE 13.0 40 2 True -9.57 -5.03 0.38 0.84 -- -- 55880008 -999 -999 26171 DARK 13.0 60 2 True -- -- -- -- -- -- 55880009 -999 -999 26171 FPI 13.0 30 245 True -13.11 -5.15 1.13 0.91 -- -- 55880010 -999 -999 26171 FPI 13.5 30 243 True -0.24 -5.13 1.08 0.88 -- -- num exptype nread mtp1 mtp2 mtp3 mtp4 mtp5 mtp6 mtp7 mtp8 mtp9 mtp10 -------- ---------- ----- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----- 55880003 QUARTZFLAT 10 74 79 89 100 100 94 96 98 99 91 ---- BOSS Data Summary ---- Reading FITS from /data/spectro//61150 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - n Time Filename design-field cfg flav shu Exp colA colB colC Hrt - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 21:37 b1-00400162 ----------- ---- bia Clo 0.0 -5429 -5376 -5363 2 21:37 r1-00400162 ----------- ---- bia Clo 0.0 -5429 -5376 -5363 3 21:53 r1-00400163 -999--999 26171 arc Lef 4.1 -5429 -5376 -5363 HART 4 21:53 b1-00400163 -999--999 26171 arc Lef 4.1 -5429 -5376 -5363 HART 5 21:54 r1-00400164 -999--999 26171 arc Rig 4.1 -5429 -5376 -5363 HART 6 21:54 b1-00400164 -999--999 26171 arc Rig 4.1 -5429 -5376 -5363 HART 7 21:55 r1-00400165 -999--999 26171 arc Lef 4.1 -3942 -3890 -3877 HART 8 21:55 b1-00400165 -999--999 26171 arc Lef 4.1 -3942 -3890 -3877 HART 9 21:55 r1-00400166 -999--999 26171 arc Rig 4.1 -3942 -3890 -3877 HART 10 21:55 b1-00400166 -999--999 26171 arc Rig 4.1 -3942 -3890 -3877 HART 11 21:56 b1-00400167 -999--999 26171 arc Out 4.1 -3919 -3865 -3856 12 21:56 r1-00400167 -999--999 26171 arc Out 4.1 -3919 -3865 -3856 13 21:58 r1-00400168 -999--999 26171 fla Out 25.1 -3919 -3865 -3856 14 21:58 b1-00400168 -999--999 26171 fla Out 25.1 -3919 -3865 -3856 ---- Weather Log ---- Wind 1 um DIMM IRSC Time Temp C Dewp C MPH Dir Dust fwhm mean sigma 18:00 11.8 -8.2 14.8 90.8 1514 18:15 10.4 -8.2 14.6 12.8 1576 18:30 12.1 -8.4 13.9 14.2 1433 18:45 10.4 -7.8 10.8 86.6 1353 19:00 11.5 -7.3 12.7 08.3 1297 19:15 12.2 -8.2 8.3 97.5 1262 19:30 12.2 -7.4 13.6 98.6 1267 19:45 11.9 -7.6 10.2 11.6 1344 20:00 13.1 -7.2 17.6 15.9 1208 20:15 11.7 -8.6 14.3 17.3 1175 20:30 11.1 -8.6 6.2 66.5 1245 20:45 11.5 -8.1 9.6 56.3 1191 21:00 12.3 -8.4 12.6 42.9 1123 21:15 10.3 -9.7 8.9 40.3 1105 21:30 11.2 -8.7 10.8 63.9 1095 21:45 10.7 -9.4 7.9 78.1 1101 22:00 13.1 -9.3 8.4 60.8 971 22:15 11.6 -7.6 10.5 25.2 1049 22:30 10.5 -7.2 7.7 53.3 1064 22:45 10.8 -6.7 4.8 60.8 1035 23:00 10.6 -6.0 2.3 15.1 1149 23:15 10.9 -6.6 4.6 57.5 1193 23:30 9.6 -6.5 1.8 21.0 1172 23:45 9.5 -6.4 0.1 28.0 1400 00:00 9.7 -6.5 1.0 67.7 1364 00:15 9.1 -6.5 1.7 68.8 1641 00:30 8.2 -6.4 4.8 78.1 1627 00:45 8.5 -6.1 1.4 16.1 1560 01:00 8.3 -5.8 6.4 91.6 1505 01:15 8.8 -7.3 9.4 82.8 892 01:30 7.0 -5.9 1.1 03.8 1444 01:45 7.5 -8.2 7.4 01.3 918 02:00 7.1 -8.4 8.9 90.1 821 02:15 6.7 -8.1 9.7 96.6 767 02:30 7.1 -7.6 10.4 51.5 983 02:45 6.4 -8.1 9.7 96.4 964 03:00 6.8 -6.2 12.6 08.5 1041 03:15 8.0 -4.0 15.3 14.1 1314 03:30 8.3 -4.4 14.6 19.3 1453 03:45 8.5 -4.0 9.9 06.7 1556 04:00 8.1 -4.3 15.1 23.7 1424 04:15 8.1 -1.9 17.4 25.4 1568 04:30 7.8 -1.0 16.6 26.7 1357 04:45 8.0 0.4 12.6 56.3 1531 05:00 7.9 0.4 12.5 37.5 1522 05:15 7.9 0.3 9.2 73.9 1681 05:30 6.9 -0.9 7.6 89.1 1367 05:45 7.4 -0.6 6.7 64.3 1273 06:00 7.0 0.2 3.9 81.0 1182 06:15 6.8 0.3 13.8 48.5 1215 06:30 6.7 0.3 9.9 43.3 1244 06:45 6.6 0.3 8.8 71.6 1187 07:00 6.4 0.3 8.5 78.4 1348 07:15 6.3 0.3 5.6 83.3 1259 07:30 5.9 0.3 8.5 51.3 1173 07:45 5.8 0.2 7.6 80.3 1351 08:00 5.8 0.1 4.8 88.4 1369 08:15 5.4 -0.1 5.6 81.9 1225 08:30 5.5 0.1 7.2 76.5 1266 08:45 5.5 0.1 7.1 79.3 1743 09:00 5.4 0.2 5.8 83.8 dpDep 09:15 5.8 0.0 9.5 78.6 dpDep 09:30 6.0 0.1 12.0 82.1 dpDep 09:45 5.9 0.1 10.1 83.6 1670 ---- Time Tracking ---- *=*=*= Observatory: APO *=*=*= MJD: 61150 Fill night time in Hours below *=*=*= Total bright time : 1.1 *=*=*= Bright time, queued observations : 0 *=*=*= Bright time, commissioning/engineering: 0 *=*=*= Bright time lost to weather : 1.1 *=*=*= Bright time lost to technical issues : 0 *=*=*= Total dark time : 8.5 *=*=*= Dark time, queued observations : 0 *=*=*= Dark time, commissioning/engineering : 0 *=*=*= Dark time lost to weather : 8.5 *=*=*= Dark time lost to technical issues : 0