VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: RDV56 Observer: Gipson, J. Project type: GEO Obs filename: rdv56crd.* Date/Day: 2006APR25/115 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Phillip Hicks, Operator du jour. Cloudy with some rain at NL, cloudy HN, the remaining sites have mostly clear conditions. vclock OK. vclock OK (-0.145 SC) UT1 - UTC = 0.25 GPS OK (largest 6.9usec at NL) MK5 HN -> NRAO-173 in bank A. MK5 FD -> NRAO-152 in bank B. MK5 LA -> NRAO-036 in bank B. MK5 KP -> NRAO-014 in bank B. MK5 BR -> NRAO-154 in bank A. The remaining sites write data to tape. MK5 units at SC,NL,PT,OV,MK are offline. Sites use tapes. RDV observations at S-band usually have interference problems. FYI... 1720 Start program. 1720-2357 %SC weather station air temperature and dew point 18101 readings appear to be reversed: dew point is reading about twice air temperature. Estimated value of refraction model will be off. 1725 Antennas arriving on source. 1720-1738 *PT Tapes not setup correctly. HUERR 100 18 1720-1740 *SC Tapes not setup correctly HUERR 100 20 1748 *OV High wind alarm (winds > 35mph). 1810 HN RDV56 writing to NRAO-135 on bank B. 1814 %FD Wind gust 35+ mph. 1910 Interference at S-band at KP & HN. 1922 MK Weather: Tech reports clear sky. 1839-2150 *HN Power outage. Running on generators. No data. COM 100 191 1932-1951 *OV dropped out of pointing. Power glitch. COM 100 19 1956 %OV Wind gust over 35mph. 2100 KP Data writing to NRAO-127 in bank A. 2140-2145 *OV Az. #1 armature fault. Reset. ACU 100 5 2245 New operator: T. Perreault 2247 OV wea: overcast, no precipitation, moderate winds 2357 SC weather station update has correct readings for air temperature and dew point (26.1C and 23.9C). 0000 Date is 2006APR26/116. 0004-0024 %SC weather station dew point reading above air 18101 temperature again. 0011-0014 OV AZ#1 armature overcurrent error condition ACU 100 3 following jumps in AZ motor currents. Suspect that high winds are the problem. Cleared by momentarily disabling the AZ axis. 0348-0428 *PT not recording data, no tape mounted TAPE 100 40 Called site tech, he said that when he left that there was vacuum on recorder 2 (writing on recorder 1). He will go to the site and reload/remount recorder 2 0437-0438 *KP EL#1 armature overcurrent error message ACU 100 1 cleared by momentarily disabling the EL axis 0525 Operator is Anthony Sowinski. 0615 Continuing RFI at HN,KP,BR. 1300 New operator is Juan Cordova. 1302 SC WEA: Broken, low clouds, none. 1320 Phillip Hicks, Operator. He is baaaack! 1354 LA Weather: Tech reports clear & dry conditions. 1424 BR WEA: Clear sky, ground and dish are dry. 1506 OV Weather: Tech reports clear and dry conditions. 1526 KP Weather: Tech reports clear & dry conditions. 1725 OV leases program as scheduled. 1730 End of program. 1730 End. Downtime Summary: Total downtime : 297 min Percentage downtime of observing: 2.0% Average downtime per hour : 1.2 min Total scheduled observing time (# Antennas): 14500 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.