VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BL123E Observer: Lister, M. Project type: VLBA Obs filename: bl123ecrd.* Date/Day: 2005APR21/111 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Sonja Mendoza. LA writing to MkV disk pack NRAO-046, bank A. KP writing to MkV disk pack JIVE-014, bank B. PT writing to MkV disk pack NRAO-020, bank A. Vclock, GPS delta, and UT1-UTC time checks all ok. 1531 Begine observation. 1531 *SC is currently undergoing a major maintenance overhaul and is unavailable for observing. 1531-1948 *BR recorder 1 accidentally miscabled to board 16021 100 257 set two. Data recorded on tape EVNT0810 on recorder 1 are no good. 1540 MK joins observation as scheduled. 1539 Readbacks ok (NL,FD,OV,BR). 1547 %OV Bad readback on track 5, drive 2. All other readbacks ok (no readback at HN). 1556 %OV Bad readback on track 5, drive 2. All other readbacks ok. 1605 %OV Bad readback track 32, drive 2. All other readbacks ok (no readback at MK) 1628 Readbacks ok. 1636 Readbacks ok. 1645 Readbacks ok (no readback at MK). 1653 Readbacks ok. 1703 Readbacks ok. 1720 Readback at MK ok. 1727 Readbacks ok (no readback at MK). 1730 WEA: HN,FD,LA,PT,KP,OV,MK: Clear skies, dry. WEA: FD: gusty winds, sometimes in excess of 35mph. WEA: NL: Overcast skies. WEA: BR: Scattered high clouds, dry. 1743 %BR Bad readback tracks 3,5,11,13,18,20,22,24, 26,28,30 and 32, on drive 1. All other readbacks ok. 1753 %BR Bad readback tracks 2,4,9,14,15,16,17,20 and 32 on drive 1. All other readbacks ok. 1802 %BR Bad readback tracks 2,4,11,14,15,16,17,22,24 26,28 and 29, drive 1. All other readbacks ok. 1813 %BR Bad readbacks tracks 2,4,6,7,8,14,16,19,21,22 23,24,25,26, and 28, drive 1. All other readbacks ok. 1821 Readbacks ok. 1830 %BR Bad readbacks tracks 15,17,30 and 32, drive 1. All other readbacks ok. 1837 %PT WEA: wind gusts > 35 mph. 1907 Readbacks ok. 1923 Readbacks ok. 1940 %BR Bad readback tracks 18-22,27,29,31 and 33 on drive 1. All other readbacks ok. 1948 %BR Bad readback tracks 7,9 and 33, drive 1. All other readbacks ok (no readback at HN). 1948 BR: Switching to Rec. #2, due to multiple bad readbacks on Rec. #1. 1958 Readbacks ok. 2001-2003 *PT: Antenna not pointed, probably due to power COM 100 2 glitch. Repointed. 2003 %MK WEA: Gusty winds. 2030 Readbacks ok. 2040 Readbacks ok (no readback at HN). 2057 Readbacks ok. 2143 All readbacks ok. 2145 New operator is Paul Dyer. 2149 *PT WEA: Wind gusts > 35mph. 2152 %OV Bad readback on drive 2, track 04. All others were ok. 2210 %OV Bad readback on drive 2, track 04. All others were ok. 2232 All readbacks ok. 2258 All readbacks ok. 2337 %FD Bad readback on drive 1, track 32. All others were ok. 2349 All readbacks ok. 2358 LA is writing Mark V disc pack NRAO-061 in bank B. 0000 Date is 2005APR22/112. 0005 All readbacks ok. 0015 All readbacks ok. 0053 %OV Bad readback on drive 2, track 04. All others were ok. 0125 KP is writing Mark V disc pack NRAO-028 in bank A. 0134 All readbacks ok. 0206 All readbacks ok. 0248 %FD Bad readback on drive 1, track 05. 15910 0248 %OV Bad readback on drive 1 track 02. All others were ok. 0315 All readbacks ok. 0347 All readbacks ok. 0418 All readbacks ok. 0501 All readbacks ok. 0520 *NL WEA: Raining. 0542 New operator is Jim Ogle. 0642 Readbacks okay. 0705 Readbacks okay. 0713 Readbacks okay. 0756 Readbacks okay. 0810-1527 *BR recorder 1 accidentally miscabled to board 16021 100 437 set two. Data recorded on tape SVLB0104 on recorder 1 are no good. 0830 Readbacks okay. 0850 Readbacks okay. 0858 Readbacks okay. 0917 Readbacks okay. 0941 Readbacks okay. 0953 Readbacks okay. 1029 Readbacks okay. 1048 Readbacks okay. 1103 Readbacks okay. 1141 Readbacks okay. 1215 %OV bad readbacks on track 5. Other sites okay. 1223 Readbacks okay. 1230 Readbacks okay. 1241 %OV bad readbacks on track 5. Other sites okay. 1245 FD reports scattered cumulus clouds. 1252 Readbacks okay. 1300 HN reports clear skies. 1315 Readbacks okay. 1324 Readbacks okay. 1332 Readbacks okay. 1333 LA reports clear skies. 1341 Readbacks okay. 1351 Operator is Sonja Mendoza. 1351 Readbacks okay. 1354 BR reports scattered high clouds, dry. 1407 Readbacks okay (no readback at OV). 1418 Readbacks okay (no readback at HN). 1426 Readbacks okay. 1435 Readbacks okay (no readback at MK). 1445 Readback at MK okay. 1452 Readbacks okay (no readback at MK). 1454 KP WEA: High, scattered clouds, dry. 1511 Readbacks ok. 1527 End. Downtime Summary: Total downtime : 696 min Percentage downtime of observing: 4.8% Average downtime per hour : 2.9 min Total scheduled observing time (# Antennas): 14360 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.