From observe@banshee.vla.NRAO.EDUTue Feb 4 14:22:23 2003 Date: Tue, 4 Feb 2003 12:00:41 +0000 From: VLA Operations To: vlbiobs@cv3.cv.nrao.edu, emomjian@cv3.cv.nrao.edu Subject: VLA Observing Log for project BM176 on 03Feb04. An ascii text copy of your VLA Observing Log follows: ************************************************************************ Program: BM176 Subarray(s): #1 Observer(s): E. Momjian Operator(s): David Midgett Date: Tuesday, Feb 4 2003 Configuration: D User Number: 600 Decommissioned: 6 Source File(s): 390BM176 VLBI Ref. Ant: 22 Observing Mode: Phased Array VLB Antenna Pad: DW8 API (Atmospheric Phase Interfermeter) data can be found at http://www.aoc.nrao.edu/vla/html/PhaseMonitor/sitemon.html. ** Weather Information ** Time (IAT) Dew Point (C) Temp. (C) Wind Bar. Pressure (mbar) API RMS Phase 03Feb04 02:02 -13.5C -1.4C NW at 3.4 m/s 788.1mbars 03Feb04 06:50 -16.6C -9.4C Calm 788.6mbars 03Feb04 10:30 -17.2C -12.9C Calm 787.7mbars Operator comments for the above weather entries. The sky is clear. The sky is clear. The sky is clear. ** Visibility Tape Information ** Tape # File # Time of Final Record: N17791 1 03Feb04 at 11:41:12 N17792 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N17800 1 Antenna(s) Used: 1 2 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ** Operator Comments ** 03Feb04 01:45:57 Starting program: BM176, observe file: 390BM176. 03Feb04 01:46:30 On source 3C48 with all available antennas. The band(s) used is(are) L band(s). 03Feb04 01:45:57 Antenna(s) 1 16 19 25 27 do not have good baseline positions determined for them because they were moved to their present location recently. In the analysis of your data would you please check for any baseline errors especially on these antennas and let the Data Analysts (email - analysts@nrao.edu) know what you find when there are significant baseline errors. Thank you in advance. 03Feb04 01:45:57 The on-line baseline parameters for antenna(s) 2 5 7 8 10 12 13 14 15 17 18 20 21 22 23 26 28 have recently been updated (prior to your observing run) to correct for errors resulting from their recent relocations. In the analysis of your data would you please check for any significant baseline errors especially on these antennas and let the Data Analysts (email - analysts@nrao.edu) know what you find when there are significant baseline errors. Thank you in advance. 03Feb04 01:45:57 - 03Feb04 06:40:00 Form #: T100146 # of Ants: 1.00 Downtime: 294.05 Antenna(s) 1 - CRYOGENICS (Cryogenics and Vacuum Hardware) Problem(s); L-band dewar is cooling. Until cooled to proper temperature data may be corrupted. Observing Data: Corrupted 03Feb04 02:41:34 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 03:58:06 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 04:56:27 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 05:53:20 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 06:50:25 **** Greg Patterson is your operator. **** 03Feb04 06:52:01 Ran a backup on the Modcomp partition where observe files are kept. 03Feb04 08:06:00 - 03Feb04 08:09:00 Form #: Other # of Ants: 1.00 Downtime: 3.00 Antenna(s) 12 - FRONT END (Front end) Problem(s); Antenna is experiencing Tsys fluctations causing total power on all IFs to go out of range. Observing Data: Corrupted 03Feb04 08:11:31 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 10:26:52 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 11:24:55 Shadowing is occurring! Some antennas are blocking the view of your radio source from other antennas. You may have to edit your data. Observing Data: Corrupted. 03Feb04 11:31:00 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Feb04 11:32:00 - 03Feb04 11:32:00 Form #: Other # of Ants: 1.00 Downtime: 0.00 Antenna(s) 25 - LOCAL OSC (Local Oscillator) Problem(s); Possible 5MHz phase jump. Near boundary with parity errors present. Please check your data. Observing Data: Unknown Effect 03Feb04 11:32:00 - 03Feb04 11:32:00 Form #: Other # of Ants: 1.00 Downtime: 0.00 Antenna(s) 25 - LOCAL OSC (Local Oscillator) Problem(s); Possible 600MHz phase jump. Not near boundary; parity errors present. Please check your data. Observing Data: Unknown Effect 03Feb04 11:44:33 End of program BM176. Total Downtime = 297.1 minutes (1.8% of total time). AsciiFileOut Version: 1.11 -- Version Date: June 20, 1996