VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BP117 Observer: Polatidis, A. Project type: VLBA Obs filename: bp117crd.* Date/Day: 2004DEC17/352 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operators are Paul Dyer and Sonja Mendoza. Vclock, GPS Delta and time checks all okay. LA writing to MK5 disk NRAO-023. KP writing to MK5 disk NRAO-008. PT writing to MK5 disk NRAO-059. 0600 Beginning observation. 0600-1443 %SC Subreflector will not drive to the correct 15359 100 523 position. Known problem, usual fixes don't always work. May be close enough for data to be good. 0600 %KP wea: Gusty winds, some in excess of 35mph. 0600 %OV 4cm dewar slightly warm (15K stage at 37.6K currently). 0608 Readbacks okay at all sites, except OV drive 2, track 5. 0618 Readbacks okay at all sites, except FD drive 2 track 5. 0645 New Operator is Brian Willard. 0650 %OV: bad readbacks track 05,30, drive 2. All other readbacks OK. 0701 All readbacks OK. 0740 All readbacks last half hour OK. 0756 %OV: bad readback track 22, drive 2. All other readbacks OK. 0805 All readbacks OK. 0835 All readbacks last half hour OK. 0905 All readbacks last half hour OK. 0917 %MK: bad readback track 31, drive 1. All other readbacks OK. 0938 WEA: occasional high winds KP. 0943 %OV: bad readback track 13, drive 2. All other readbacks OK. 1000 All readbacks OK. 1018 %MK: bad readback track 06, drive 1. 1051 All readbacks OK. 1121 All readbacks last half hour OK. 1151 All readbacks last half hour OK. 1219 WEA: scattered clouds SC. 1219 WEA: clear HN, snow on ground. 1220 WEA: continued high winds KP. 1221 All readbacks last half hour OK. 1223 WEA: occasional snow NL. 1231 %MK: bad readbacks tracks 14,16, drive 1. All other readbacks OK. 1241 All readbacks OK. 1311 All readbacks last half hour OK. 1320 WEA: clear NL. 1328 WEA: scattered clouds FD. 1340 %FD: bad readback track 32, drive 1. 1340 %OV: bad readback track 05, drive 2. 1340 %MK: bad readback track 26, drive 1. All other readbacks OK. 1352 WEA: clear LA. 1358 WEA: clear PT. 1410 All readbacks last half hour OK. 1434 %MK: bad readbacks tracks 30,32, drive 1. All other readbacks OK. 1443 New operator is Jim Ogle. 1443 SC rotation in correct position; did a master clear to remove a motor overspeed fault and it went onto position at next scan change. 1444 Readbacks okay. 1457 KP reports clear skies, windy conditions. 1458 LA reports clear skies. 1510 Readbacks okay. 1513 %BR reports overcast skies, low cloud cover. 1527 Readbacks okay. 1536 %FD bad readbacks on track 5. Other sites okay. 1553 Readbacks okay. 1608 OV reports clear skies. 1612 Readbacks okay. 1622 Readbacks okay. 1707 %MK bad readbacks on tracks 6, 8. Other sites okay. 1717 %FD bad readbacks on track 5. Other sites okay. 1742 Readbacks okay. 1850 Readbacks this past hour okay. 1853-1950 *OV site tech needs on the antenna to deal with a CRYO 100 57 cryo problem on the 4cm receiver. 1913 MK reports scattered cirrus clouds. 1945 Readbacks this past hour okay. 2039 %MK bad readbacks on tracks 23 and 25. Other sites okay. 2127 KP reports clear skies. 2129-2130 *KP autostowed, commercial power glitch. Repointed. COM 100 1 2132 Readbacks this past hour okay. 2229 Readbacks this past hour okay. 2239 New operator is Paul Dyer. 2256 All readbacks ok. 2352 OV wea: Clear and dry. 2300-0000 All readbacks at all sites okay. 0000 Date is 2004DEC18/353. 0000-0100 All readbacks at all sites okay. 0100-0200 All readbacks at all sites okay. 0200-0300 All readbacks at all sites okay. 0300-0400 All readbacks at all sites okay. 0400-0500 All readbacks at all sites okay. 0524 %KP Occasional strong wind gusts, in excess of 35mpg. 0500-0600 All readbacks at all sites okay. 0604 All readbacks ok. 0612-0616 *FD Subreflector out of position due to FRM 100 4 brake fault. Was able to reset and clear. 0612-0628 *HN Subreflector out of position, can't command FRM 100 16 to correct position. Mostly likely due to cold temperatures. 0612-0559 *OV 4cm dewar warm but cooling after earlier 15394 100 1427 maintenance work. System temperatures elevated. 0613 All readbacks okay. 0623 All readbacks okay. 0633 All readbacks okay. 0645 New operator is Brian Willard. 0703 All readbacks last half hour OK. 0733 All readbacks last half hour OK. 0803 All readbacks last half hour OK. 0833 All readbacks last half hour OK. 0903 All readbacks last half hour OK. 0933 All readbacks last half hour OK. 1003 All readbacks last half hour OK. 1033 All readbacks last half hour OK. 1101 %BR: bad readbacks tracks 15,17, drive 2. All other readbacks since 1033 OK. 1103 *OV 4cm dewar stopped cooling and has begun warming 15394 up again. Will need to be pumped down again. 1131 All readbacks last half hour OK. 1201 All readbacks last half hour OK. 1231 All readbacks last half hour OK. 1301 All readbacks last half hour OK. 1319 *OV 4cm dewar cooling again. 15394 1331 All readbacks last half hour OK. 1358 %FD: bad readback track 05, drive 1. All other readbacks since 1331 OK. 1404 WEA: scattered clouds SC. 1404 WEA: clear HN,NL,FD,PT. 1428 All readbacks last half hour OK. 1436 WEA: clear KP,OV. 1445 New operator is Jim Ogle. 1537 All readbacks this past hour okay. 1632 All readbacks this past hour okay. 1727 All readbacks this past hour okay. 1740 OV reports clear skies. 1752 %FD bad readbacks on track 5. Other sites okay. 1832-1833 *PT autostowed, commercial power glitch. Repointed. COM 100 1 1840-1853 *BR drive #2 somehow reserved itself, no tape on HUERR 100 13 drive #1 for it to switch to. Released drive #2 and it started writing again at beginning of next write scan. However, autoallocate appears to have skipped from pass 13 to pass 14; to avoid any chance of it going back and trying to write on pass 13 again and overwriting any data already there I'm marking pass 13 as filled. 1851 All readbacks this past hour okay. 1859 &BR site tech called and notified that tape will be running out earlier than anticipated; he was just about to leave for the site anyway. 1900 HN reports clear skies. 1905 MK reports scattered cirrus and cumulus clouds. 1928 *BR site tech believes he may have accidently caused drive #2 to reserve itself, he had been checking the TRKUSE screen right before the problem occured. Will chalk it up to HUERR then. 1948 All readbacks this past hour okay. 2101 All readbacks this past hour okay. 2154 All readbacks this past hour okay. 2233 All readbacks this past half hour okay. 2252 %NL bad readbacks on tracks 3, 5, 30 and 32 on drive #1. Other sites okay. 2305 OV reports clear skies. 2355 *OV 4cm receiver is warming up yet again. 2359 All readbacks this past hour okay. 0000 Date is 2004DEC19/354. 0051 All readbacks this past hour okay. 0203 All readbacks this past hour okay. 0236 %High wind gusts at NL. 0240 New operator is Paul Dyer. 0400 All readbacks since last report were ok. 0500 All readbacks in the last hour were ok. 0559 End. Downtime Summary: Total downtime : 2042 min Percentage downtime of observing: 7.1% Average downtime per hour : 4.3 min Total scheduled observing time (# Antennas): 28790 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.