VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BK107F Observer: Krichbaum, T. Project type: VLBA Obs filename: bk107fcrd.* Date/Day: 2005FEB03/034 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK EB =UT-Time===Comment===============================================MF#===%AD==AMD= 0630 Begin file VCLOCK check ok. MK at -0.506 (ping 1.326 seconds) UT1-UTC check ok (-0.52) GPS delta < 10 us LA recording Mark V bank B disc pack NRAO-012 Operator: T. Perreault 0630-2131 %FD false EL#2 low lube pressure flag - data ACU 100 901 are good but being flagged bad. When loading FD data, please load flagged data. 0630-1035 *PT loss of commercial power. Major power outage COM 100 245 around Pie Town. Called Socorro Electric Co-op dispatch at 0530 UT, was told that it would be several hours before power was restored. Site is on generator. Unpointable. Observing program pulled from observ.tx 0630-2131 *SC, HN: no 3mm receivers for these antennas, SCH 67 603 yet observation has 3mm scans. 0630-2131 *FD high system temperatures at 3mm. There are 15636 34 306 no outstanding forms for the 3mm at FD. Unknown as to why there are high system temperatures - perhaps weather related or water/moisture/condensation in the feed? 0642 New operator is Paul Dyer. 0642 All readbacks ok. 0659 %KP Bad readback on drive 1, track 33. All others were ok. 0716 %MK Bad readbacks on drive 2, tracks 4,6,and 8. All others were ok. 0733 All readbacks ok. 0740-1110 *MK WEA: Snowing, going into avoid snow. WEA 100 210 0750 All readbacks ok. 0841 All readbacks ok. 0858 All readbacks ok. 0915 %KP Bad readback on drive 1, track 33. All others were ok. 0932 All readbacks ok. 0949 All readbacks ok. 1006 All readbacks ok. 1035 PT Commercial power is back on. Started file. 1035 *SC WEA: Raining. 1055-1059 *PT Autostowed. No error message. COM 100 4 1104-1106 *PT Autostowed again. Commercial power COM 100 2 is probably still unstable. 1057 All readbacks ok. 1114 All readbacks ok. 1130-1200 *MK WEA: Running avoid snow. WEA 100 30 1131 All readbacks ok. 1132-1134 *PT Autostowed again. COM 100 2 1148 All readbacks ok. 1157 LA is writing Mark V disc pack NRAO-037 in bank A. 1205 All readbacks ok. 1239 All readbacks ok. 1240-1300 *MK WEA: Running avoid snow. WEA 100 20 1256 All readbacks ok. 1313 %NL Bad readback on drive 2, track 9. All others were ok. 1330-1340 *SC AZ #2 armature overcurrent. ACU 100 10 1330 All readbacks ok. 1342 *FD WEA Tech reports heavy haze, frost on most surfaces. 1347 %NL Bad readback on drive 2, track 9. All others ok. 1404 All readbacks ok. 1421 All readbacks ok. 1438 %KP Bad readback on drive 2, track 19. All others were ok. 1455 All readbacks ok. 1458 BR WEA: Scattered high, thin clouds. Frost in dish. 1512 All readbacks ok. 1527 Operator is Sonja Mendoza. 1529 All readbacks ok. 1546 %KP Bad readbacks on drive 2, tracks 15,17,22,24 and 28. All other sites ok. 1600-2131 *NL Subreflector sometimes doesn't drive to correct FRM 5 16 location without operator intervention. 1602 LA, OV WEA: Clear skies and dry. 1603 All readbacks ok. 1618 All readbacks ok. 1633 All readbacks ok. 1634 %SC WEA: precipitation starting. 1648 %KP Bad readback on drive 2, tracks 26 and 28. All other sites ok. 1703 All readbacks ok. 1718 All readbacks ok. 1720-1740 *LA Site techs attempted to load a disc pack and REC 100 20 somehow the write protect turned on for bank A and will not reset properly. Have contacted W. Brisken for technical assistance. Update: LA techs have shut down the Mark V computer and reseated the card which interfaces to the disk packs. This fixed the problem. 1733 All readbacks ok. 1748 %KP Bad readback drive 2, tracks 21, 26 and 28. All other sites ok. 1803 All readbacks ok. 1808 %SC WEA: Intermittant rain showers. 1808 MK WEA: Overcast skies, cold, snow on ground. 1808 NL,FD,LA,PT,KP,OV,BR WEA: Clear skies, dry. 1808 HN WEA: Partly cloudy, dry. 1818 All readbacks ok. 1833 All readbacks ok. 1848 %KP Bad readback on drive 1, track 6. All other sites ok. 1903 All readbacks ok. 1913 KP WEA: Low, broken clouds moving in. 1933 All readbacks ok. 1948 All readbacks ok. 2003 All readbacks ok. 2018 %PT Bad readback on drive 2, track 13. All other sites ok. 2033 All readbacks ok. 2047 MK leaves observation as scheduled. 2047 All readbacks ok. 2102 All readbacks ok. 2117 All readbacks ok. 2131 End. Downtime Summary: Total downtime : 2369 min Percentage downtime of observing: 26.3% Average downtime per hour : 15.8 min Total scheduled observing time (# Antennas): 9010 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.