From observe@nrao.edu Thu Feb 1 06:31:12 2007 Date: Thu, 01 Feb 2007 13:30:50 +0000 From: VLA Operations To: vlbiobs@nrao.edu, lincoln@cfa.harvard.edu Subject: 2007-02-01_0347_BG169B.txt ************************************************************************ Filename: 2007-02-01_0347_BG169B Program: BG169B Subarray(s): 1 Observer(s): Lincoln Greenhill Operator(s): David Midgett Date: 02/01/2007 Configuration: DnC User #: 600 Decommissioned: 21 Source File(s): 852G169C 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 01Feb 03:47:40 -5.7 -2.5 W at 4.9 m/s 777.8 4.0 01Feb 4:59:55 -6.3 -2.7 W at 6.2 m/s 777.8 3.7 01Feb 7:09:06 -6.1 -3.7 W at 5.0 m/s 777.2 2.3 01Feb 7:59:13 -5.1 -3.3 W at 4.5 m/s 776.8 5.7 01Feb 9:09:37 -4.6 -2.9 NW at 3.5 m/s 776.8 10.7 01Feb 9:59:44 -4.7 -2.4 W at 4.0 m/s 776.5 8.3 01Feb 10:59:30 -4.9 -2.6 W at 4.7 m/s 776.1 8.9 01Feb 11:59:15 -4.6 -2.8 W at 5.4 m/s 776.0 8.6 Operator comments for the above weather entries 01Feb 03:47:40 Sky cover 50%. Mixed clouds. 01Feb 4:59:55 Sky cover 30%. Mixed clouds. 01Feb 7:09:06 Sky cover 30%. Mixed clouds. 01Feb 7:59:13 Sky cover 20%. Mixed clouds. 01Feb 9:09:37 Sky cover 60%. Stratiform clouds. 01Feb 9:59:44 Sky cover 70%. Mixed clouds. 01Feb 10:59:30 Sky cover 60%. Mixed clouds. Snow. 01Feb 11:59:15 Sky cover 90%. Mixed clouds. Snow. ** Visibility Tape Information ** Tape # Time of Final Record: DM0170 ** Monitor Tape Information ** Tape # File # Time of Final Record: N21513 6 Total # of antennas used = 27 ** Operator Comments ** START TIME END TIME FORM # #ANTS DOWNTIME (in minutes) 01Feb 3:47:40 Starting program BG169B. 01Feb 3:47:40 The band(s) used is(are): X K 01Feb 3:51:00 On source 3C147 with all available antennas. 01Feb 3:47:40 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. 01Feb 3:47:40 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. 01Feb 3:47:40 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 01Feb 3:47:40 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. 01Feb 03:47:40 01Feb 13:30:30 T100417 1.00 582.8 Antenna 26 (Data: Lost): EVLA Antenna does not have a K-band receiver. 01Feb 03:51:00 01Feb 13:30:30 C119754 1.00 579.5 Antenna(s) 17 (Data: Lost): FOC/ROT Subreflector not responding to commands. 30Dec 5:02:00 Inspected the VLB instrumentation. No problems found. 01Feb 05:57:00 01Feb 06:05:00 Power 6.00 48.0 Antenna(s) 5, 6, 8, 10, 11, 19 (Data: Lost): SITE POWER Site power fluctuation caused antennas to lose non-critical power. Reset antenna power and control units, and repointed antennas. 01Feb 6:09:00 Inspected the VLB instrumentation. No problems found. 01Feb 7:16:00 Your new operator(s) is(are): Jim Campbell 01Feb 7:17:00 Ran a backup on the Modcomp partition. 01Feb 7:17:00 Inspected the VLB instrumentation. No problems found. 01Feb 8:05:00 Inspected the VLB instrumentation. No problems found. 01Feb 10:10:00 Inspected the VLB instrumentation. No problems found. 01Feb 11:03:00 Inspected the VLB instrumentation. No problems found. 01Feb 12:10:00 Inspected the VLB instrumentation. No problems found. 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. End Time Total Program Time % Downtime Total Downtime (in minutes) (in minutes) 02/01/07 13:30:30 15736.5 7.7% 1210.3