VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BA071B Observer: Agudo,I. Project type: VLBA Obs filename: ba071bcrd.* Date/Day: 2004DEC20/355 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Brian Willard. GPS delta all less than 10 microseconds. Vclock values good. UT1-UTC values all -0.50. WEA: SC,HN unknown. WEA: scattered clouds NL,MK,. WEA: clear FD,LA,PT,KP,BR. 2313 Observation Begins. 2318 WEA: snow HN. 2313-2326 *SC Rotation west overspeed error - subreflector 15359 100 13 off position in rotation. (Times estimated from TSMPLOT flagged data plot.) 2328 %SC: occasional 1cm RFI on RCP. 2348-0123 *SC Rotation west overspeed error - subreflector 15359 100 95 off position in rotation. (Times estimated from TSMPLOT flagged data plot.) 0000 Date is 2004DEC21/356. 0043 %BR: bad readbacks all tracks, drive 2. All other readbacks OK. 0050-0055 *SC: power glitch, repointed. COMM 100 5 0102 MK on source. 0102-1106 %MK dew point reading higher than air temperature WEAST 100 604 estimated value of refraction model will be off 0109 %BR: bad readbacks all tracks except 10,21,25,29, 32 and 33, on drive 2. All other readbacks OK. 0143-0220 *SC Rotation west overspeed error - subreflector 15359 100 37 off position in rotation. (Times estimated from TSMPLOT flagged data plot.) 0250-0307 *SC Rotation west overspeed error - subreflector 15359 100 17 off position in rotation. (Times estimated from TSMPLOT flagged data plot.) 0313-0425 *SC Rotation west overspeed error - subreflector 15359 100 72 off position in rotation. (Times estimated from TSMPLOT flagged data plot.) 0346 %BR: bad readbacks all tracks except tracks 14,18,32, drive 1. All other readbacks OK. 0411 %BR: bad readbacks all tracks except track 6, drive 2. All other readbacks OK. 0433-0610 *SC Rotation west overspeed error - subreflector 15359 100 97 off position in rotation. (Times estimated from TSMPLOT flagged data plot.) 0510-1106 PT: removed for VLA link observation. SCH 100 356 0603 HN getting very cold. May need to stow. 0640 New operator: T. Perreault 0639-0652 *SC Rotation west overspeed error - subreflector 15359 100 13 off position in rotation at 7mm. 0651 %BR bad readback drive 2 all tracks 19343 all other sites ok 0703-0715 *SC Rotation west overspeed error - subreflector 15359 100 12 off position in rotation at 7mm 0752 KP noticed that there was no disc pack loaded in Bank B. Ran cksched, there should be just enough space available on the currently writing disc pack in Bank A to finish this observation. 0845-0849 *SC Rotation west overspeed error - subreflector 15359 100 4 off position in rotation at 2cm. 0847 %BR bad readback drive 2 all tracks 19343 all other sites ok 0900-0910 *SC Rotation west overspeed error - subreflector 15359 100 10 off position in rotation at 7mm. 0911 %BR bad readback drive 2 tracks 2-4,7,10,11,14,15 19343 18,19,22,23,26,27,30,31 all other sites ok 1035 %SC wea: raining, seeing elevated system WEA temperatures 1042 SC observing ends 1106 End. Downtime Summary: Total downtime : 1335 min Percentage downtime of observing: 18.7% Average downtime per hour : 11.2 min Total scheduled observing time (# Antennas): 7130 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.