VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BL111Q Observer: M. Lister Project type: VLBA Obs filename: bl111qcrd.* Date/Day: 2004DEC02/337 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operators are T. Perreault and S. Mendoza PT using disk pack NRAO-026 Vclock check: All good, except for MK (due to slow internet connection: Clk-UTC -2.036). Time check: -0.49 for all sites. GPS delta check: All sites good (less than 10mircoseconds). Weather: SC and MK Scattered cirrus and cumulus. HN, NL, FD, LA, PT, KP Clear skies. BR Overcast. OV Scattered clouds. 1951 Begin observing. 1955 On source will all antennas. 1957-2007 %MK Elevated system temperatures, due to weather WEA conditions. 2008 Readback check okay. 2017-2020 *SC Autostowed due to power glitch. Repointed. COM 100 3 2037 Readback check ok 2049 Readback check ok 2056 KP wea: Overcast, high clouds. 2118-2121 *PT autostowed. Power glitch. Repointed. COM 100 3 2129 LA bad readback drive 2 track 2; all other sites ok 15305 2146 LA bad readback drive 2 track 2; all other sites ok 15305 2223 MK bad readback drive 2 track 2; all other sites ok 2255 %LA: bad readback, track 02, drive 2. 15305 All other readbacks tests OK. 2300 New operator is Brian WIllard. 2317 %LA bad readback track 02, drive 2. 15305 All other readbacks OK. 2344 All readbacks OK. 0000 Date is 2004DEC03/338. 0009 %NL: occasional high wind gusts. WEA 0011 All readbacks OK. 0053 %LA: bad readback track 02, drive 2. 15305 All other readbacks OK. 0106 %LA: bad readback track 02, drive 2. 15305 All other readbacks OK. 0142 All readback test OK. 0148 All readback tests OK. 0204 %HN: bad readback track 33, drive 1. All other readback tests OK. 0232 %LA: bad readback track 02, drive 2. 15305 All other readback tests OK. 0241 Same readbacks as above. 0251 Same readbacks as above. 0258 Same readbacks as above. 0318 All readbacks OK. 0352 All readback tests OK. 0418 Return of the Bad Readback: Bad readback, track 02, drive 2 at LA. All other readback tests OK. 0443 Same readbacks as above. 0451 Same readbacks as above. 0502 All readback tests OK. 0509 All readback tests OK. 0553 %LA: bad readback track 02, drive 2. All other readbacks OK. 0611 Same readbacks as above. 0618 Same readbacks as above. 0638 Same readbacks as above. 0645 New operator is Paul Dyer. 0704 %LA Bad readback on track 08, drive 2. All other sites were ok. 0713 All readbacks ok. 0739 All readbacks ok. 0838-0844 *MK Drive two is full, autoallocate tried to switch REC 100 6 to drive one, but it had no vacuum. I called the tech and he confirmed that there is a new tape threaded on drive one so I reloaded it. Looks ok. 0900 All readbacks in the last hour were ok. 0930 MK VME rebooted for no apparent reason. 1000 All readbacks in the last hour were ok. 1100 All readbacks in the last hour were ok. 1152 *SC WEA: Raining. 1200 All readbacks in the last hour were ok. 1300 All readbacks in the last hour were ok. 1306 MK rebooted itself again. 1400 All readbacks in the last hour were ok. 1445 New operators: T. Perreault & S. Mendoza 1454 BR wea: low overcast, no precipitation KP wea: clear, no precipitation 1500 LA wea: clear, no precipitation 1506 Readback check ok 1524 Readback check ok 1538 PT recording disc pack NRAO-061 on bank A. 1551-1553 *LA site computer rebooted. Messages prior SW 100 2 to the reboot were: doComent(): unrecognized type=0 text=tSuper: tPointdrv not running - will restart doComent(): unrecognized type=50 text=tPointdrv not running - will restart Looks like the task Pointdrv did not start up, so task Super rebooted the station VME. 1613 Readback check ok 1614 OV wea: clear, no precipitation 1634 %FD Bad readback on track 05, drive 1. All other sites ok 1700-1717 *BR Antenna parked to allow tech to fix 7mm dewar. 15312 100 17 1703 %FD Bad readback on track 05, drive 1. All other sites ok 1725 PT using disk pack NRAO-061 1733 Readback check ok 1752 Readback check ok 1756-1819 *BR Antenna parkded to allow site tech to purge cryo 15312 100 23 lines in 7mm dewar 1842 %FD Bad readback on track04, drive 1. All other sites 1846-1852 *PT autostowed, power glitch, repointed. COM 100 6 1852 Readback check ok 1910 MK wea: scattered cirrus and cumulus, cold and windy. 1929 Readback check ok 1943 Readback check ok 1945 MK stop observing as scheduled. 1953 End. Downtime Summary: Total downtime : 60 min Percentage downtime of observing: 0.4% Average downtime per hour : 0.2 min Total scheduled observing time (# Antennas): 14420 min (10) Notes: * = Entries where data was affected. % = Entries where data may have been affected. & = Entries where the site tech was called out. WEA = Weather entries. MF# = Maintenance form or major downtime category associated with a problem. %AD = The percentage of an antenna affected by a problem. AMD = Total antenna-minutes downtime for a problem. Tsys = System Temperature (TP/SP x Tcal/2) ACU = Antenna Control Unit FRM = Focus/Rotation Mount RFI = Radio Frequency Interference VME = Site control computer CB = Circuit Breaker vclock = Program that compares site clock time to a standard.