VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BR081B Observer: Rector, T. Project type: VLBA Obs filename: br081bcrd.* Date/Day: 2003JAN04/004 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= 0004 Begin file VCLOCK check okay. SC at -0.249 GPS delta < 10 us Operator: T. Perreault 0004 SC has bogus "antenna position error too large" 10325 data flags which are flagging good data approx. 60-70% of the time. 0004 HN wea: snowing 0010 BR bad readback drive 1 tracks 2,4,22,23,24,25 All others okay 0011 MK joins 0039 FD bad readback drive 1 track 19 All others okay 0105 Readback check okay 0112 SC wea: raining 0134 Readback check okay 0159 FD bad readback drive 1 track 19 All others okay 0228 BR bad readback drive 1 tracks 2-10,12,14,16,18,20 26,28,30,32 All others okay 0229-0234 *HN doing a snow dump. EL currents are running about WEA 100 5 20 amps. 0254 BR bad readback drive 1 tracks 2-5,10-14,18-33 All others okay 0323 KP bad readback drive 1 tracks 2,3,6,7,10,11,14,15 18,19,22,23,26,27,30,31 All others okay 0329-0516 *KP getting MCB (Master Control Bus) errors on all 10506 100 107 BBCs and FORMATTERs. Have an indication that the D-rack air temperature is 40+ deg C. Did a graph of the D-rack air temp on VLCj, it started to rise suddenly about 90 minutes ago. Looks like the cooling fan in the D-rack died. Called site tech Ray McFarlin, he will go out to the site and check on things. 0344 KP stopping observation until Ray can see just what is wrong. Getting a SETFMT error at source changes when the program attempts to set the FORMATTERS. 0348 Readback check okay 0417 FD bad readback drive 1 tracks 4,19 All others okay 0443 Readback check okay 0447 KP Ray is on site. 0456 KP Ray reports that the blower on the underside of the D-rack is dead. He is going to shut down the D-rack to remove the blower. 0516 End. 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 = TP/SP x Tcal/2