VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BO013A Observer: Ojha, R. Project type: VLBA Obs filename: bo013acrd.* Date/Day: 2003FEB17/048 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operators are Cyrus Reed and Paul Dyer. WEA: SC,FD,LA,PT,KP,OV,BR,MK Clear skies, dry. WEA: HN,NL Overcast, snowing. TIME: vclock,GPS,UT1-UTC OK at all sites 1923 Begin at all sites. 1923-1131 *HN Antenna unusable due to ice/snow load. WEA 100 968 1923-1131 *PT 50/90cm receiver not installed. FE 25 242 1923 *PT Recent subreflector replacement has affected calibration and efficiencies, esp. at 4cm. 1942 *NL WEA: Snowing. 1956 All readbacks ok. 2008 All readbacks ok. 2040 All readbacks ok. 2044 %SC WEA: Low broken clouds, dry. 2044 %PT WEA: Overcast, dry. 2158 All readbacks ok. 2239 New operator is Jim Ogle. 2242 Readbacks okay. 2326 Readbacks okay. 2337 readbacks okay. 2357 Readbacks okay. 0000 Date is 2003FEB18/049. 0007-0022 *MK tape drive lost vacuum, no tape on other drive 10861 100 15 for a switchover. 0022 MK tape reloaded remotely, recording data again. 0030 Readbacks okay. 0101 *BR bad readbacks on tracks 2, 14 and 16, drive #1. 10862 Other sites okay. 0124-0125 *PT rotation position error. FRM 100 1 0233 *OV bad readbacks on tracks 3, 5, 7 and 9, drive #1. Other sites okay. 0243 Readbacks okay. 0254-0259 *MK tape drive lost vacuum again. Did not start 10861 100 5 writing data again after reload, had to do a REOBS to get it moving again. 0255 Readbacks okay. 0314 Readbacks okay. 0319 Readbacks okay. 0324 Readbacks okay. 0401 Readbacks okay. 0425 Readbacks okay. 0538 Readbacks okay. 0615 Readbacks okay. 0638 New Operator is Dave Pierce. 0701 *NL Bad readbacks on Drive #1, tracks 32 & 33. All other site readbacks are okay. 0800 *BR Bad readbacks on drive #1, tracks; 2,3,4,5, 10862 10,11,12,13,14,16,19,21. All other site readbacks are okay. 0818 BR Called out site tech for unscheduled tape 10860 change. Drive #2 unloaded after 10 passes. 0849-0859 *MK Lost vacuum on Drive #1 again, 10861 100 10 reloaded tape remotely. 0931 All readbacks are okay. 0950 *NL Bad readbacks on Drive #1, tracks 32 & 33. All other site readbacks are okay. 1025 *NL Bad readbacks on Drive #1, tracks 32 & 33. All other site readbacks are okay. 1103 All readbacks are okay. 1131 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