From observe@banshee.vla.NRAO.EDUMon Jan 6 09:44:07 2003 Date: Mon, 6 Jan 2003 04:53:16 +0000 From: VLA Operations To: vlbiobs@cv3.cv.nrao.edu, nakai@nro.ac.jp Subject: VLA Observing Log for project BN020 on 03Jan05. An ascii text copy of your VLA Observing Log follows: ************************************************************************ Program: BN020 Subarray(s): #1 Observer(s): N Nakai Operator(s): Jim Nieri Date: Sunday, Jan 5 2003 Configuration: C User Number: 600 Decommissioned: 6 Source File(s): 360N020 VLBI Ref. Ant: 18 Observing Mode: Phased Array VLB Antenna Pad: CN2 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 03Jan05 20:15 0C 12.3C w at 4.5 m/s 788.4mbars 5.4 03Jan05 21:36 -0.5C 12.3C nw at 3.5 m/s 787.4mbars 11.2 03Jan05 23:03 -0.2C 10C NW at 2.2 m/s 787.1mbars 3.8 03Jan06 02:32 -4.3C 4.2C SE at 2.9 m/s 787.8mbars 8.6 03Jan06 04:32 -4.1C 3.3C SE at 2.8 m/s 788.1mbars 5.9 Operator comments for the above weather entries. Sky Cover is 45%. Stratusform type. High Thin Stratus Sky Cover is 85%. Stratusform type. Sky Cover is 95%. Stratusform type. Overcast. Sky Cover is 80%. Stratusform type. Sky Cover is 80%. Stratusform type. ** Visibility Tape Information ** Tape # File # Time of Final Record: N17653 1 03Jan06 at 2:29:54 N17654 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N17640 6 03Jan06 at 0:00:00 N17640 7 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 ** 03Jan05 18:41:15 Starting program: BN020, observe file: 360N020. 03Jan05 18:46:00 On source 3C354.3 with all available antennas. The band(s) used is(are) K band(s). 03Jan05 18:41:15 Antenna(s) 12 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. 03Jan05 18:41:15 - 03Jan05 20:15:00 Form #: C110513 # of Ants: 0.25 Downtime: 23.44 VLBA DAQ (VLBA Samplers and Formatters) Problem(s); The baseband Converter for BB3 (slot 3) was having a flagging status , but the Frequency was indicating good. I swapped a BBC#7 aand the Flagging status disappeared and the power levels went nominal. Observing Data: Lost.. Unsure if the data is affected. 03Jan05 20:15:00 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan05 21:09:45 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan05 18:41:15 - 03Jan05 21:13:00 Form #: C110500 # of Ants: 0.25 Downtime: 37.94 Antenna(s) 12 - FRONT END (Front end) Problem(s); The A/B channels are dead at K-band.. I removed the aantenna later because it would affect the Phasing of the rest of the aarray. Observing Data: Lost 03Jan05 21:13:00 - 03Jan06 04:39:40 Form #: C110500 # of Ants: 1.00 Downtime: 446.67 Antenna(s) 12 - FRONT END (Front end) Problem(s); The A/B channels are dead at K-band.. I removed the aantenna later because it would affect the Phasing of the rest of the aarray. Observing Data: Lost 03Jan05 21:30:00 The Phaseing is very good @ < 3 rms. 03Jan05 22:03:21 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan05 23:03:06 **** Sonja Mendoza is your operator. **** 03Jan05 23:03:48 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan05 23:05:15 Ran a backup on the Modcomp partition where observe files are kept. 03Jan06 00:10:00 Power levels on Baseband converters 3 and 4 fluctuating high and low; sky frequencies are at the low end edge of the range of what VLA K-band receivers are capable of receiving at. Effect on data unknown. Data not flagged. 03Jan06 00:51:03 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan06 02:33:01 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan06 03:08:00 Form #: C110514 # of Ants: 0.00 Downtime: Antenna(s) 22 - LOCAL OSC (Local Oscillator) Problem(s); A 600Mhz round trip phase jump occurred at this time. Please check your data. Observing Data: Unknown Effect 03Jan06 03:30:10 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. 03Jan06 03:37:12 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan06 03:37:00 Form #: C110482 # of Ants: 0.00 Downtime: Antenna(s) 14 - LOCAL OSC (Local Oscillator) Problem(s); A 600Mhz round trip phase jump occurred at this time. Please check your data. Observing Data: Unknown Effect 03Jan06 04:08:00 Form #: C110514 # of Ants: 0.00 Downtime: Antenna(s) 22 - LOCAL OSC (Local Oscillator) Problem(s); A 600Mhz round trip phase jump occurred at this time. Please check your data. Observing Data: Unknown Effect 03Jan06 04:32:31 The telescope operator made an inspection of the VLB instrumentation. No problems found. 03Jan06 04:39:40 End of program BN020. Total Downtime = 508.0 minutes (3.1% of total time). AsciiFileOut Version: 1.11 -- Version Date: June 20, 1996