VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BU026B Observer: Ulvestad, J.S. Project type: VLBA Obs filename: bu026bcrd.* Date/Day: 2004AUG12/225 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= 1703 Begin file VCLOCK check ok. KP at -2.210 (ping 4.591 seconds) UT1-UTC check ok (-0.45) GPS delta < 10 us Operator: T. Perreault 1703-1100 %MK: TSMPLOTs show "ratty" system temperatures OTHER 50 538 on channels 2 (15361.49 MHz, USB, LCP) and 4 (15369.49 MHz, USB, LCP). 1717 *SC bad readbacks drive 2 tracks 15,19,23,33; 14568 all other sites ok 1724 *SC bad readbacks drive 2 tracks 15,19,23,27,33; 14568 all other sites ok 1732 *SC bad readback drive 2 tracks 15,19,23,33 14568 called site tech, will be swapping over to drive 1 when tape is done prepassing and mounted. 1750 SC recording on drive 1 (tape: EVNT0459) 1821 Readback check ok 1829 MK readback check ok 1836 MK wea: clear, gusty winds 1907 Readback check ok 1909 KP wea: very light rain, low overcast 1921 Readback check ok 2009 Readback check ok 2036 HN, FD, PT readback check ok 2041-2359 %LA: TSMPLOTs show elevated system temperatures WEA 50 99 on all channels. Increase in system temperatures correspond to rainfall. 2049 Readback check ok 2057 KP wea: broken low clouds, no precipitation 2106 Readback check ok 2139 New operator is Jim Ogle. 2147 %High wind gusts at PT. 2215 Readbacks okay. 2305 OV reports mostly clear skies. 2317 Readbacks okay. 2320-2321 *PT autostowed, probably a commercial power glitch. COM 100 1 Repointed. 2349 Readbacks okay. 0000 Date is 2004AUG13/226. 0003-0005 *PT autostowed. COM 100 2 0023-0024 *PT autostowed. COM 100 1 0040-0041 *PT autostowed. COM 100 1 0045 Readbacks okay. 0104 Readbacks okay. 0131 *FD bad readbacks on track 4, drive #1. Other sites okay. 0152 Readbacks okay. 0212 Readbacks okay. 0247 %High wind gusts at LA. 0257 Readbacks okay. 0317 Readbacks okay. 0403 %Raining at HN, elevated Tsys values. 0410 Readbacks okay. 0417 Readbacks okay. 0438 *FD bad readbacks on track 4. Other sites okay. 0509 Readbacks okay. 0541 Readbacks okay. 0545 New operator Cyrus M Reed. 0605 MK readbacks OK. 0622 SC readbacks OK. 0708-0832 %KP: Network is down - 'aocrouter' is routing the traffic out over the internet, rather than the usual 'TUC-AOC-se' link. Dial backup is working, will periodically dial the site to monitor observing. Note: TSMPLOTs show a gap in the monitor data for this time period. 0710 All readbacks OK. 0717 All readbacks OK. 0731 All readbacks OK. 0731-0734 *FD Autosotwed due to power glitch. Repointed. COM 100 3 0738 All readbacks OK. 0754 %KP VME rebooted itself - cause unknown. 0800-1707 %SC: TSMPLOTs show elevated system temperatures WEA 50 273 on all channels. Increase in system temperatures correspond to rainfall at site. 0800-1530 %FD: TSMPLOTs show elevated system temperatures WEA 50 225 on all channels. Increase in system temperatures correspond to rainfall at site. 0756-0810 %KP: Using dial backup - waiting for tape change. 0814 MK readbacks OK. 0832 %KP: Back on dial backup - caught one 'tUsenet not running - will restart' message. Suspect that the VME has been misbehaving in the absence of a network connection. Will keep running dial backup until normal network connectivity is restored. 0836-0844 *FD Autostowed due to power problems. Leaving stowed COM 100 8 until problems clear. 0934 MK readbacks OK. 0951 All readbacks OK. 1005 All readbacks OK. 1103 SC WEA: Reports broken low clouds, wet. 1121 *FD bad readback: Drive 1, Tracks 32. All other readbacks OK. 1210 HN WEA: Reports overcast, low clouds - light rain. 1236-1250 *FD has run out of tape - called site tech, no answer HUERR 100 14 left message, but I expect them on site shortly. 1243 All readbacks OK. 1246 FD WEA: Reports overcast, light rain. 1300 WEA: Cloud cover via webcam: WEA: SC,LA Cumulus (75%,60%). NL Clear skies. WEA: HN Stratocumulus (100%). FD Stratus (100%). WEA: PT,KP Cumulus (5%,80%). BR Cirrus (35%). WEA: OV,MK Unknown (webcam not updating, night). WEA: Light rain at FD - other sites dry. 1302 All readbacks OK. 1327-1329 *NL Autostowed due to power glitch. Repointed. COM 100 2 1342 New operator: T. Perreault 1350 LA wea: overcast, no precipitation 1403 Readback check ok 1417 SC wea: raining 1424-1431 *HN loss of communication with the site, during OTHER 100 7 which the antenna autostowed. When communications was restored, got the message that the antenna was not pointing. Repointed antenna. 1446 KP wea: overcast high & low clouds, no precipitation 1502 Readback check ok 1511 Readback check ok 1525 Readback check ok 1621 Readback check ok 1622-1626 *OV tape on drive 2 stopped at the end of the SW 100 4 first forward pass. Was able to get tape to start recording in reverse by re-reading the current scan twice. 1635 Readback check ok 1642 Readback check ok 1707 End. Downtime Summary: Total downtime : 1178 min Percentage downtime of observing: 8.2% Average downtime per hour : 4.9 min Total scheduled observing time (# Antennas): 14440 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.