VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: RDV55 Observer: Gipson, J. Project type: GEO Obs filename: rdv55crd.* Date/Day: 2006FEB01/032 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Anthony Sowinski. UT1-UTC correct, gps delta and vclock okay. HN recording on NRAO-032, bank B. FD recording on NRAO-133, bank B. LA recording on NRAO-151, bank B. PT recording on NRAO-014, bank A. KP recording on NRAO-088, bank A. BR recording on NRAO-096, bank A. 1759 Begin file everywhere but SC which starts later. 1759 *KP Periodic RFI at S-band. 1800 %BR Possibly some ice in dish; T_sys's slighty high. 1805 Begin file at SC. 1818-2203 *HN Stopped observing and running tracksun due to WEA 100 225 snow and ice in dish causing high system temps. 2007-2009 *PT ACU error, antenna dropped out of point, ACU 100 2 repointed. 2030 Scattered RFI at many of the sites from time to time, not as bad as at KP. 2130 PT WEA: 35+ mph winds. 2131 KP WEA Site tech: clear and dry. 2203 HN returned to observing, high X-band temps, S-band sys temps ok. 2230-2232 *SC Out of point. Power glitch? COM 100 2 2245 Operator is Sonja Mendoza. 2331 MK WEA: Site tech reports clear skies, dry. 2357 OV WEA: Site tech reports mostly clear skies, dry. 0000 Date is 2006FEB02/033. 0035 LA writing on Mk5 disk NRAO-038, bank A. 0036 FD writing on Mk5 disk NRAO-149, bank A. 0036 KP writing on Mk5 disk NRAO-072, bank B. 1759-0249 *FD Antenna is off source; reason is unknown, there 17603 100 530 are no error messages. Attempting to clear and repoint. Rebooting site computer... 0213 *FD Contacting site tech for advice. Apparently there is a known problem with the antenna control unit (ACU). 0221 *FD Parking the antenna. 0248 *FD Site tech reset the ACU, antenna pointed. 0545 %SC WEA: Precipitation starting. 0620-0624 *OV Antenna out of point mode; probable power glitch. COM 100 4 Repointed. 0645 New operator is Brian Willard. 0728-0752 *FD: power glitch autostow, repointed. COM 100 24 0957-1012 *FD: power glitch autostow, repointed. COM 100 15 1010-1029 *SC: power glitch autostow, repointed. COM 100 19 1026-1149 *PT: stowed for CB maint. 17606 100 83 1104-1127 *SC: power glitch autostow, repointed. COM 100 23 1204-1247 *SC: stowed for front-end errors. 17609 100 43 1324 BR writing on NRAO-150, Bank B. 1334-1715 *SC: stowed for high a-rack temp. 17609 100 221 1418-1425 *FD: pause for disc swap. REC 100 7 1438 New operator is Jim Ogle. 1447 *SC tech reports problem is with a power supply in the A-rack. Water is leaking into the vertex room and appears to have shorted out the PS. Sensor cards are not getting any power and that's what's causing all the error messages. 1448 HN now writing to NRAO-031 in bank A. 1451 LA reports scattered high clouds. 1502-1504 *KP not tracking on source, oscillating around ACU 100 2 the commanded position in both AZ and EL. Briefly put antenna in standby and repointed, went on source. 1513-1602 *PT AZ#1 armature/electronics CB fault again. 17611 100 49 Stowing antenna while waiting for site tech to return to site (after leaving from the previous CB fault callout.) 1527 KP reports broken high thin clouds. 1528 BR reports scattered high clouds, frost. 1603 OV reports clear skies. 1705 *SC has repaired the A-rack power supply problem 17609 but now they are trying to figure out why the pedestal room emergency stop won't disengage. 1708 %High wind gusts at LA. 1715 SC now observing again. 1759 End at all sites except MK. 1807 End. Downtime Summary: Total downtime : 1249 min Percentage downtime of observing: 8.6% Average downtime per hour : 5.2 min Total scheduled observing time (# Antennas): 14480 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.