From observe@nrao.edu Wed Jan 31 06:42:59 2007 Date: Wed, 31 Jan 2007 13:35:02 +0000 From: VLA Operations To: vlbiobs@nrao.edu, lincoln@cfa.harvard.edu Subject: 2007-01-31_0355_BG169A.txt ************************************************************************ Filename: 2007-01-31_0355_BG169A Program: BG169A Subarray(s): 1 Observer(s): Lincoln Greenhill Operator(s): David Midgett Date: 01/31/2007 Configuration: DnC User #: 600 Decommissioned: 21 Source File(s): 851G169A VLBI Ref. Ant: 10 Observing Mode: Phased Array VLBI Antenna Pad: DE8 Email Address: vlbiobs@nrao.edu, lincoln@cfa.harvard.edu API (Atmospheric Phase Interferometer) information can be found at: http://www.vla.nrao.edu/astro/guides/api/ Adobe PDF version of this log is located at: http://www.vla.nrao.edu/operators/logs/ Visibility data is updated each day at IAT/UT midnight and available from the online archive at: http://archive.nrao.edu ** Weather Information ** Time (IAT) Dew Pt Temp Wind Bar. Press API 31Jan 03:55:30 -0.7 1.5 SW at 2.9 m/s 782.9 5.2 31Jan 5:09:27 -0.4 0.5 W at 3.7 m/s 783.0 11.6 31Jan 6:59:42 -0.9 -0.2 W at 2.9 m/s 782.5 208.9 31Jan 7:59:40 -0.9 -0.2 W at 4.8 m/s 781.8 2.7 31Jan 8:59:39 -0.8 -0.3 W at 5.2 m/s 781.4 11.6 31Jan 10:09:18 -1.6 -0.7 W at 6.4 m/s 781.1 4.8 31Jan 10:59:34 -3.2 -1.3 W at 5.8 m/s 780.2 5.2 31Jan 11:59:33 -3.7 -1.5 W at 4.0 m/s 780.2 5.5 31Jan 13:19:33 -5.8 -2.8 W at 5.5 m/s 780.5 15.5 Operator comments for the above weather entries 31Jan 03:55:30 Sky overcast. Mixed clouds. Light snow. 31Jan 5:09:27 Sky overcast. Mixed clouds. Light snow. 31Jan 6:59:42 Sky cover 70%. Mixed clouds. Light Snow. 31Jan 7:59:40 Sky overcast. Stratiform clouds. Snow. 31Jan 8:59:39 Sky overcast. Stratiform clouds. Snow. 31Jan 10:09:18 Sky cover 60%. Stratiform clouds. 31Jan 10:59:34 Sky cover 30%. Stratiform clouds. 31Jan 11:59:33 Sky cover 50%. Stratiform clouds. 31Jan 13:19:33 Sky cover 20%. Stratiform clouds. ** Visibility Tape Information ** Tape # Time of Final Record: DM0170 ** Monitor Tape Information ** Tape # File # Time of Final Record: N21513 5 Total # of antennas used = 27 ** Operator Comments ** START TIME END TIME FORM # #ANTS DOWNTIME (in minutes) 31Jan 3:55:30 Starting program BG169A. 31Jan 3:55:30 The band(s) used is(are): K 31Jan 3:59:00 On source 3C147 with all available antennas. 31Jan 3:55:30 Antenna(s) : 8 11 12 19 20 22 25 28 have recently updated baseline parameters to correct for errors resulting from their recent relocation. Antenna(s) : 13 14 16 17 18 21 23 24 26 do not have good baseline positions determined for them because they were moved to their present location recently. Please check for any significant errors and let the Data Analysts (email - analysts@nrao.edu) know what you find. Thank you. 31Jan 3:55:30 As part of the EVLA transition plan, a new correlator controller has replaced vintage equipment and is now routinely in use. The system has been thoroughly tested but we welcome reports of problems that may be related to improper correlator behavior to analysts@nrao.edu. 31Jan 3:55:30 We are currently including all checked-out (operational) EVLA antennas in the VLA by default. For your project, we have included the following EVLA antennas in the array: 13 14 16 18 23 24 31Jan 3:55:30 Please note that using the EVLA antennas is a shared-risk operation and we cannot guarantee that useful data will be produced by these antennas. Users should consult the web page http://www.vla.nrao.edu/astro/guides/evlareturn for known problems and workarounds in using the EVLA antennas with the VLA. We would like your input and feedback on the use of the EVLA antennas in your project; please send all comments and/or questions to gvanmoor@aoc.nrao.edu. 31Jan 03:55:30 31Jan 13:34:40 T100417 1.00 579.2 Antenna 26 (Data: Lost): EVLA Antenna is being used for EVLA testing 31Jan 03:55:30 31Jan 13:34:40 T100418 1.00 579.2 Antenna 17 (Data: Lost): EVLA Antenna is being used for EVLA testing 31Jan 04:40:00 31Jan 06:52:00 High system temperature and Tsys fluctuations on antennas 3, 4, 6, 8, 9, 11, 15, 22, and 27. Possibly due to weather conditions. 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. 31Jan 6:52:00 Inspected the VLB instrumentation. No problems found. 31Jan 7:09:00 Your new operator(s) is(are): Jim Campbell 31Jan 8:21:00 Inspected the VLB instrumentation. No problems found. 31Jan 10:11:00 Inspected the VLB instrumentation. No problems found. 31Jan 11:08:00 Inspected the VLB instrumentation. No problems found. 31Jan 12:04:00 Inspected the VLB instrumentation. No problems found. 31Jan 13:27:00 Inspected the VLB instrumentation. No problems found. End Time Total Program Time % Downtime Total Downtime (in minutes) (in minutes) 01/31/07 13:34:40 15637.5 7.4% 1158.3