VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BB200A Observer: Brunthaler, A. Project type: VLBA Obs filename: bb200acrd.* Date/Day: 2005APR07/097 Ants Scheduled: HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Jim Ogle. VCLOCK and gps delta checks okay. LA writing to Mk5 disc pack NRAO-036 in bank A. PT writing to Mk5 disc pack NRAO-052 in bank A. KP writing to Mk5 disc pack NRAO-040 in bank A. %Sitecam weather: HN and BR broken low clouds, NL overcast, OV party cloudy, other sites clear. 1338 Begin. 1352 LA reports clear skies. 1355 Readbacks okay. 1401 Readbacks okay. 1411 Readbacks okay. 1414 %BR reports overcast skies, high cloud cover. 1415 Readbacks okay. 1418-1932 *MK autostowed, false 55MPH wind stow error. 15933 100 314 Reset command did not work, ACU MCB not responding. 1424 Readbacks okay. 1446 KP reports clear skies. 1505 OV reports partly cloudy skies, windy. 1534 %High wind gusts at OV. 1651-1653 *PT site computer rebooted to load a software change. SW 100 2 1700-1702 *PT rebooted again. SW 100 2 1712-1714 *PT rebooted again. SW 100 2 1715 Readbacks okay. 1832 *Shut down observing system at MK. 1911-1918 *PT focus second screw fault; did a master clear FRM 100 7 and it was okay at next scan change. 1912 Readbacks okay. 1925 Readbacks okay. 1937 Readbacks okay. 1940 Readbacks okay. 1941 MK reports clear skies. 1949 Readbacks okay. 1959 %KP reports overcast skies, high clouds. 2130-2138 *MK testing ACU reset command. 15933 100 8 2134 *MK rebooted VME. 2140-2141 *OV AZ#1 armature overcurrent fault. ACU 100 1 2155 PT now writing to Mk5 disc pack NRAO-063 in bank B. Operator is Sonja Mendoza. 2215-2240 *BR Recorder #2 lost vacuum, switched to REC 100 25 recorder 2 successfully. 2309 %PT WEA: wind gusts > 35 mph. 0000 Date is 2005APR08/098. 0023 %BR WEA: wind gusts > 35 mph. 0028 %MK Bad readbacks on tracks 2, 4, 6, 8, 12, 16, 20, 24, 28 and 32, drive 2. All other readbacks ok. 0040 %MK Bad readbacks on tracks 2, 4, 6, 8, 12, 16 and 28, drive 2. All other readbacks ok (no readback at HN, FD). 0048 %MK Bad readbacks on tracks 2, 4, 6, 8, 16, 18, 20, 22, 24, 28, 29 and 32, drive 2. All other readbacks ok (no readback at FD). 0049 KP now writing on Mk5 disc pack NRAO-048 in bank B. 0055 %MK Bad readback tracks 2, 4, 6, 10, 12, 16, 20, 22, 24 and 32, drive 2. All other readbacks ok. 0102 %MK Bad readbacks on tracks 2, 4, 6, 8, 12, 14, 16, 20, 24, 26, 28 and 32, drive 2. All other readbacks ok. 0112 Readback at HN ok. 0114 Readbacks at NL,FD,OV and BR ok. 0114 MK leaving observation as scheduled. 0118 Readbacks ok. 0121 End. Downtime Summary: Total downtime : 361 min Percentage downtime of observing: 5.7% Average downtime per hour : 3.4 min Total scheduled observing time (# Antennas): 6327 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.