VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BO019D Observer: R. Ojha Project type: VLBA Obs filename: bo019acrd.* Date/Day: 2005FEB01/032 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Paul Dyer. VCLOCK, GPS Delta, and UT1-UTC check ok. 1025 Begin at all stations. 1025 LA is writing Mark V disc pack NRAO-013 in bank A. 1025-1111 *SC FRM rotation not at commanded value. 15359 100 46 Error is about 1.5 deg. 1031 All readbacks ok. 1047 All readbacks ok. 1111 *SC After trying all normal solutions, I removed SC from observing and manually moved the FRM in rotation to large and small values, then commanded it to the correct position, it locked there, and I disabled the rotation axis so that it will stay there, then restarted the observation. 1114 All readbacks ok. 1123 All readbacks ok. 1214 All readbacks ok. 1218 *FD WEA: Snowing. 1234 SC Tech reports scttered low clouds. Dry. 1251 All readbacks ok. 1318 All readbacks ok. 1339 HN Tech reports clear skies. 1353 All readbacks ok. 1428 All readbacks ok. 1438 All readbacks ok. 1446 New operator is Jim Ogle. 1448 %Sitecam weather: HN, PT, KP and OV clear skies. NL, FD overcast. LA mostly cloudy skies. SC sitecam not working, BR and MK still dark. 1452 %LA reports overcast skies, slight dusting of new snow. 1455 KP reports clear skies. 1456 Readbacks okay. 1459 BR reports scattered high clouds. 1526-1529 *Dumping snow at FD. WEA 100 3 1530 Readbacks okay. 1605-1607 *MK autostowed, commercial power glitch. Repointed. COM 100 2 1609 OV reports clear skies. 1628 Readbacks okay. 1637 Readbacks okay. 1733 %Snowing at MK. 1736 Readbacks okay. 1747-1817 *PT techs need onto the antenna to check a strut HWA 100 30 assembly. 1802 LA now writing to Mk5 disc pack NRAO-012 in Bank B. 1817-1841 *PT EL#2 low lube pressure fault occured as soon as ACU 100 24 I repointed the antenna. Have put it in standby and site tech is investigating. 1827 Readbacks okay. 1837 *NL bad readbacks on tracks 14 and 16, drive #2. Other sites okay. 1841 PT techs added some oil and checked out the pressure switch, resuming pointing. 1916 %High wind gusts at OV. 1922 *MK reports overcast skies, snow falling. 1900-2000 Readbacks at 1910, 1920 and 1955 UT all okay. 2022 Readbacks okay. 2041 *FD bad readbacks on track 6, drive #1. Other sites 15628 okay. 2050 Readbacks okay. 2124 Readbacks okay. 2127 KP reports broken low clouds. 2200 New operator: T. Perreault 2200-2300 Readbacks at 2207, 2217, 2227, and 2237 UT ok except *FD bad readback track 4 drive 1 at 2217 UT 15628 *PT bad readback track 7 drive 1 at 2217 UT 2300-0000 Readbacks at 2303, 2313, and 2354 (MK only) ok except: *FD bad readback tracks 4, 15 on drive 1 at 2303 UT 15628 2356 OV wea: partly cloudy, no precipitation, windy 0000 Date is 2005FEB02/033. 0000-0100 Readbacks at 0018, 0028, 0039, 0048 ok except *FD bad readback track 4 drive 1 at 0039 UT 15628 0100-0200 Readbacks at 0114, 0132 (MK only), 0148 (BR only) and 0157 were ok except *FD bad readback track 4 drive 1 at 0157 UT 15628 0200-0300 Readbacks at 0208, 0243 ok 0300-0400 Readbacks at 0309, 0319, 0328, 0349 ok 0400-0500 Readbacks at 0415, 0422, 0451, 0458 ok except *FD bad readback track 4 drive 1 at 0458 UT 15628 0500-0600 Readbacks at 0516, 0534, 0545, 0551 ok except *FD bad readback track 4 drive 1 at 0545 UT 15628 0609 ok 0626 SC tracks 27,29 drive 2 0641 New operator is Paul Dyer. 0700 All readbacks ok. 0718 *FD Bad readback on drive 1, track 08. All others were ok. 0725-0731 *SC Autostowed. Lost commercial power. Generator on. COM 100 6 Will repoint when errors clear. 0733 All readbacks ok. 0751 All readbacks ok. 0826 All readbacks ok. 0836 %NL Bad readbacks on drive 2, tracks 19 and 21. All others were ok. 0929 All readbacks ok. Also at 0858 and 0907. 0939 All readbacks ok. 0946-1013 *SC Antenna autostowed. Power problems. Site COM 100 27 tech is on site checking it out. 1001 All readbacks ok. 1010 %MK Bad readback on drive 2, track 05. All others were ok. 1024 End. Downtime Summary: Total downtime : 138 min Percentage downtime of observing: 1.0% Average downtime per hour : 0.6 min Total scheduled observing time (# Antennas): 14390 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.