VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BP110A Observer: Petrov, L. Project type: VLBA Obs filename: bp110acrd.* Date/Day: 2004APR30/121 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= 0152 Begin file VCLOCK check ok. SC at -0.144 UT1-UTC check ok GPS delta < 10 us Operator: T. Perreault PT writing on recorder 1 tape HST00214, track 3. Had some tape issues in previous observation w/ recorder 1. 0317 Readback check ok 0335 Readback check ok 0341 Readback check ok 0453 BR readback check ok 0455-0457 *PT pointing error of up to 1 deg 30 minutes of ACU 100 2 arc in ELEVATION when tracking/pointing around 17 degrees in EL. 0526-0149 *BR high system temperature channel 3 - suspect INT 8 97 RFI 0535 New Operator is Dave Pierce. 0536 %OV Bad readbacks on drive #1, tracks 17,22,32. All other site readbacks are okay. 0540 %OV Bad readback on drive #1, track 19. All other site readbacks are okay. 0710 All readbacks are okay. 0717 All readbacks are okay. 0745 %MK Bad readback on drive #1, track 20. All other site readbacks are okay. 0854 All readbacks are okay. 1101 All readbacks are okay. 1217 WEA: Scattered low clouds, no precipitation,dish is dry. 1234 %MK WEA: Wind gusts > 35 mph. 1311 FD WEA: Thin scattered clouds, no precipitation, dish is dry. 1316-1317 *NL AZ #2 armature over current. Temporarily ACU 100 1 disabled/enabled AZ control. 1345 New operator is Cyrus M Reed. 1402 HN,BR readbacks OK. 1414 All readbacks OK. 1508-1525 *FD Techs working on Ped room UPS. SCH 100 17 Antenna electronics reset - antenna not pointed - data from this time period should be considered bad and disregarded. 1530-1531 *SC AZ #2 armature over current. I disabled ACU 100 1 the AZ axis for a couple seconds to clear the fault. 1614 All readbacks OK. 1630 WEA: Cloud cover via webcam: WEA: SC,LA Cumulus. (25%,75%) WEA: HN Light cirrus/clear skies. WEA: NL,PT Stratus. (100%,100%) WEA: FD,KP,OV,BR,MK Clear skies. WEA: No recent precipitation at any site. 1702 All readbacks OK. 1708-1709 *HN Autostowed due to power failure. Repointed. COM 100 1 1756 All readbacks OK. 1901 All readbacks ok. 1915-1919 *MK Ran out of tape. Tech should be there soon. HUERR 100 4 1916 MK readbacks OK. 1926 All readbacks OK. 1950-1952 *SC Autostowed due to power failure. Repointed. COM 100 2 Running on 150KW generator power. 2002 All readbacks OK. 2030 WEA: Cloud cover via webcam: WEA: SC,KP,OV,BR,MK Clear skies. WEA: HN Altostratus. (80%) WEA: NL,PT Stratus. (100%,100%) WEA: FD,LA Cumulus. (50%,95%) WEA: No recent precipitation at any site. 2039-2042 *SC Autostowed on restoration of commercial COM 100 3 power. Repointed. 2050 *NL WEA: Raining. 2129-2130 *BR Autostowed due to pwer failure. Repointed. COM 100 1 2145 New operator: T. Perreault 0000 Date is 2004MAY01/122. 0107 NL bad readback drive 1 track 31; all other sites ok 0112 Readback check ok 0145 Readback check ok 0149 End. Downtime Summary: Total downtime : 129 min Percentage downtime of observing: 0.9% Average downtime per hour : 0.5 min Total scheduled observing time (# Antennas): 14370 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.