VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: GC025A Observer: Charlot, P. Project type: VLBI Obs filename: gc025acrd.* Date/Day: 2006FEB18/049 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK EB =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Sonja Mendoza. HN writing on Mk5 disk NRAO-068, bank A. FD writing on Mk5 disk NRAO-159, bank B. LA writing on Mk5 disk NRAO-104, bank A. PT writing on Mk5 disk NRAO-099, bank B. KP writing on Mk5 disk NRAO-067, bank A. BR writing on Mk5 disk NRAO-045, bank B. SC, NL, OV and MK writing to tape. Vclock, GPS delta and UT1-UTC time checks all ok. SC,HN,NL,BR WEA: Clear skies. Note that there may trace amounts of snow in HN dish. Recent precipitation at SC and HN. FD,MK WEA: Overcast skies, dry. Gusty winds at MK. LA,PT,KP,OV WEA: Partly cloudy skies, dry. Gusty winds at PT. 2200 Begin observation. Note that BR joins 20min later. 2200-0100 *HN Site is on generator power following a loss COM 100 180 of commercial power. 2220 BR joins the observation 2232 Readbacks ok. 2254 Readbacks ok. 2327 Readbacks ok. 2357 %MK WEA: Precipitation starting. 0000 Date is 2006FEB19/050. 0052 Readbacks ok. 0147 Readbacks ok. 0100-0326 *HN Commercial power restored to site, but FRM FRM 100 146 inoperable (MCB errors, can't communicate with FRM). &Have contacted site tech, will go to site later. 0258 HN MCB error on FRM has cleared, attempting to point antenna for observing. 0308 *HN Site tech has cleared FRM MCB problems, but now FRM has driven into a CCW limit. Site tech attempting to drive it out, suspending observing. 0313 Readbacks ok. 0329 %MK WEA: Precipitation starting. 0344 PT,LA WEA: Gusty winds. 0408 Readbacks ok. 0441 Readbacks ok. 0532 Readbacks ok. 0609-0657 #SC AZ #2 armature over current, AZ motor 1 current 17689 100 48 > 60 amps. Attempting to clear. &Can't clear problem, contacting site tech. 0642 New operator is Jim Ogle. 0712 Readbacks okay. 0745 Readbacks okay. 0817 Readbacks okay. 0943 Readbacks okay. 0946 Readbacks okay. 1052 Readbacks okay. 1113 Readbacks okay. 1218 Readbacks okay. 1251 Readbacks okay. 1255 Readbacks okay. 1334 Readbacks okay. 1344 %NL sitecam shows snow over about a quarter of the dish. 1438 Readbacks okay. 1442 Operator is Sonja Mendoza. 1541 Readbacks okay. 1613 Readbacks okay. 1620 Readbacks okay. 1623 Readbacks okay. 1659 %MK WEA: Precipitation starting, light snow on the ground, skies overcast, foggy. 1718 Readbacks okay. 1735 SC,HN,LA WEA: Mostly clear skies, dry. 1735 PT,KP,BR WEA: Clear skies, dry. 1735 FD,OV WEA: Overcast skies, dry. 1736 NL WEA: Overcast skies, light snow on the ground. No precipitation at this time. 1907 LA,PT,MK,HN WEA: Gusty winds. 1945 FD WEA: Gusty winds. 1950 Readbacks ok. 1954 Readbacks ok. 2043 Readbacks ok. 2111 Readbacks ok. 2133 Readbacks ok. 2201 End. Downtime Summary: Total downtime : 374 min Percentage downtime of observing: 2.6% Average downtime per hour : 1.6 min Total scheduled observing time (# Antennas): 14410 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.