VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BM209D Observer: Marcaide, J.M. Project type: VLBA Obs filename: bm209dcrd.* Date/Day: 2005APR08/098 Ants Scheduled: HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Sonja Mendoza Vclock, GPS delta and UT1-UTC time checks all ok. LA using MkV disk NRAO-036, bank A. PT using MkV disk NRAO-063, bank B. KP using MkV disk NRAO-048, bank B. %WEA: OV,KP,MK: gusty winds, sometimes in excess of 35 mph. %WEA: HN: Intermittant rain. WEA: NL,FD,LA,PT,MK: CLear to mostly clear skies. WEA: BR: Partly cloudy to cloudy skies. 0324 Begin observation at all stations. 0329 %OV WEA: wind gusts > 35 mph. 0415 LA now writing on MkV disk NRAO-012, bank B. 0450 Readbacks ok. 0535 New operator: T. Perreault 0617 Readback check ok 0700-0710 LA loss of Internet comm. 0713-0723 LA loss of Internet comm. 0733-0746 LA loss of Internet comm. 0755 *FD bad readback drive 1 tracks 32,33; all other sites ok 0822-0849 *FD drive 1 lost vacuum. Called site tech, he will go 15941 100 27 and mount new tape. 0921 FD site tech off site. 0935 Readback check ok 1113-1114 *KP EL#1 armature overcurrent error ACU 100 1 cleared by momentarily disabling the EL axis. 1138 *MK bad readback drive 1 all tracks except: 15944 4,5,11,33 all other sites ok 1256 %HN wea: low overcast, no precipitation 1340 New operator is Jim Ogle. 1346 %LA reports overcast skies. 1406 %FD reports overcast skies. 1411 BR reports clear skies. 1415 *MK bad readbacks on all tracks. Other sites okay. 15944 1446-2034 *Observing being halted at MK so recorder tech can 15944 100 348 check out readback problems on drive #1. 1456 KP reports broken high clouds. 1601 *Recorder tech reports that MK drive #1 does not 15944 have any good data on it, suspects a problem between the formatter and the recorder. Nothing further can be done until the site techs arrive. 1611 Readbacks okay. 1634 %High wind gusts at PT. 1700-1701 *FD focus position error. Nothing appeared wrong FRM 100 1 aside from the error but I had to do a master clear before I could get the focus to move. 1721-1723 *OV EL#1 armature over current fault. Briefly ACU 100 2 disabled EL axis to clear error. 1746 Readbacks okay. 1920 MK reports scattered cirrus clouds. 2032 Readbacks okay. 2033 %High wind gusts at LA. 2034-0308 %MK is being flagged with an ACU fault; this is due 15933 to a bad sensor being jumpered around to prevent false wind stows from occuring. 2146 Operator is Sonja Mendoza. 2250 %PT WEA: wind gusts > 35mph. 2256 Readbacks ok (no readback at HN). 2257 %LA WEA: wind gusts > 35mph. 0000 Date is 2005APR09/099. 0117-0121 *OV: Antenna out of point due to azimuth motor #1 ACU 100 4 armature over current. Repointed. 0118 Readbacks ok. 0127 %OV WEA: continued high winds in excess of 35mph. 0215 %NL Bad readback tracks 23, 25 on drive 1. All other readbacks ok. 0300 %OV WEA: continued high winds in excess of 35mph. 0304 Readbacks ok. 0308 End. Downtime Summary: Total downtime : 383 min Percentage downtime of observing: 3.0% Average downtime per hour : 1.8 min Total scheduled observing time (# Antennas): 12816 min (9) 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.