VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BL149AJ Observer: Lister, M. Project type: VLBA Obs filename: bl149ajcrd.* Date/Day: 2008JUN25/177 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is A. Sowinski. UT1-UTC -0.44, vclock and gps delta okay. NL Ellipsoid may flag as being in the wrong position, but please ignore this. It is really ok. 0728 Begin, except at MK. 0736 begin at MK. 1006-1007 %LA Comm lost to mark5. 1010-1051 %FD 2cm cryo warmed up to about 37K before cooling back down to about 15K. 1240 FD reports wea: cloudy, dry. 1302-1309 *PT Antenna autostowed. Power glitch? COM 100 7 1337 New operator is Jim Ogle. 1355 LA reports scattered high clouds. 1357 PT reports mostly clear skies. 1402 BR reports a few high scattered clouds. 1309-1420 *PT formatter Header Control Module #1 Error, HC1 21522 100 71 FIFO errors. 1439-1445 *PT techs need on antenna to check out a module. 22918 100 6 1445-1449 %PT FRM MCB error; site techs must have done MCB 100 4 something to confuse the MCB and it can't communicate with the FRM. The FRM is probably in the correct position but data will be flagged since the system can't tell. 1449 PT FRM communicating again, looks like it stayed in the right position. 1513-1549 *FD techs need on antenna to deal with a cryo 22943 100 36 problem. 1517 OV reports clear skies, smoke. 1549 *FD techs done for now but they'll need to go back 22943 on the antenna later to swap out a bad pump. 1735-1744 *Shutting observing system down at BR so they can FMTR 100 9 swap out a suspect interface board. 1742-1843 *FD techs have taken the antenna again. 22943 100 61 1827 Turning on DQA at BR to monitor for possible formatter problems. 1852 %FD reports thunderstorms, light rain in the area. 1901 MK reports clear skies. 1908 *Raining at FD. 2102 KP reports broken low clouds. 2125 New operator: T. Perreault 2246 OV wea: partly cloudy, no precipitation, thick smoke 0000 Date is 2008JUN26/178. 0022-0026 *KP autostowed. Power glitch. Repointed. COM 100 4 0038-0055 %KP wea: light rain 0059-0103 *KP autostowed. Power glitch. Repointed. COM 100 4 0121-0229 %NL wea: raining 0121 %KP wea: raining 0128 &KP loss of communication with site; phone lines are 22949 up. If communication doesn't come back, will go to dial backup. 0142 KP unable to dial in with the dial backup modem and 22949 Hypertem. Can't dial into the site with the Mike modem either - giving a connection data rate of 56K (far too high). Will call oncall site tech; he may be able to dail in from home to monitor or go to the site. 0205 KP contacted oncall site tech. He said that the 22949 communications on the mountain are VOIP, so if I can't dial in, he wouldn't be able to either. This would also explain the incorrect baud rate on the MIKE modem (should be 300 baud). Site tech was going to call the people that take care of the communications and see what is going on. 0238 KP site tech enroute to the site to monitor 22949 observing. 0303-0354 %NL wea: raining 0411-0735 %NL wea: raining 0416 KP site tech onsite, said that the antenna is 22949 stowed. He will repoint. Probably stowed following a power glitch or wind stow warning. He will also try to see what is wrong with the Internet connection. 0445-0454 %SC wea: raining 0456-0507 *OV AZ1 and AZ2 motor currents over 60 amps ACU 100 11 and AZ1 armature overcurrent errors. Cleared by momentarily disabling the AZ axis. 0507 KP site tech called. He can call out, we can't call 22949 in. Informed him that the next file, MT826, will not be run there tonight (files have yet to be sent out) unless communications is restored between now and the start of the file at around 1042 UT. Next file after that isn't until around 0930 KP local time, and the techs will be on site by then to point the antenna if we still have a loss of communication with the site. 0542 Operator is A. Sowinski. 0624-0705 *NL AZ#1 ACU fault. Called site tech. 22953 100 41 0735 End. Downtime Summary: Total downtime : 254 min Percentage downtime of observing: 1.8% Average downtime per hour : 1.1 min Total scheduled observing time (# Antennas): 14470 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.