From observe@nrao.edu Sun Apr 30 17:16:19 2006 Date: Sun, 30 Apr 2006 23:16:06 +0000 From: VLA Operations To: vlbiobs@nrao.edu, knudsen@mpia-hd.mpg.de Subject: 2006-04-30_1534_BK127C.txt ************************************************************************ Filename: 2006-04-30_1534_BK127C Program: BK127C Subarray(s): 1 Observer(s): K. Knudsen Operator(s): David Midgett Date: 04/30/2006 Configuration: A User #: 600 Decommissioned: 26 Source File(s): 574K127C VLBI Ref. Ant: 9 Observing Mode: Phased Array VLBI Antenna Pad: N8 Email Address: vlbiobs@nrao.edu, knudsen@mpia-hd.mpg.de 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 is available from the online archive at: http://e2e.nrao.edu/archive/ ** Weather Information ** Time (IAT) Dew Pt Temp Wind Bar. Press API 30Apr 15:34:20 -6.4 12.9 W at 5.0 m/s 789.2 3.8 30Apr 17:29:12 -8.3 18.5 NW at 8.2 m/s 788.5 15.1 30Apr 19:19:31 -8.3 20.0 NW at 6.1 m/s 787.5 10.0 30Apr 21:59:11 -7.5 21.7 NW at 8.2 m/s 786.2 10.6 30Apr 22:59:09 -7.5 21.3 NW at 8.2 m/s 785.9 10.3 Operator comments for the above weather entries 30Apr 15:34:20 Sky clear. 30Apr 17:29:12 Sky clear. Gusty winds. 30Apr 19:19:31 Sky clear. Gusty winds. 30Apr 21:59:11 Sky cover 50%. Mixed clouds. 30Apr 22:59:09 Sky cover 70%. Mixed clouds. ** Visibility Tape Information ** Tape # Time of Final Record: DM0096 ** Monitor Tape Information ** Tape # File # Time of Final Record: N21471 6 Total # of antennas used = 27 ** Operator Comments ** START TIME END TIME FORM # #ANTS DOWNTIME (in minutes) 30Apr 15:34:20 Starting program BK127C. 30Apr 15:34:20 The band(s) used is(are): L 30Apr 15:39:00 On source 3C48 with all available antennas. 30Apr 15:34:20 Antenna(s) : 13 18 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. 30Apr 15:34:20 30Apr 23:06:20 C112151 1.00 452.0 Antenna 13 (Data: Lost): EVLA Antenna is being used for EVLA testing. 30Apr 15:34:20 30Apr 23:06:20 T100268 1.00 452.0 Antenna 14 (Data: Lost): EVLA Antenna is being used for EVLA testing. 30Apr 15:34:20 30Apr 23:06:20 T100312 1.00 452.0 Antenna 16 (Data: Lost): EVLA Antenna is being used for EVLA testing. 30Apr 15:34:20 30Apr 23:06:20 T100329 1.00 452.0 Antenna 18 (Data: Lost): EVLA Antenna is being used for EVLA testing. 30Apr 15:34:20 30Apr 23:06:20 T100376 1.00 452.0 Antenna 24 (Data: Lost): EVLA Antenna is being used for EVLA testing. 30Apr 15:39:00 NOTE: RFI is present on all IFs and is affecting various antennas. All antennas look to be phasing up well with the reference antenna, however. 30Apr 15:39:00 30Apr 23:06:20 C118140 1.00 447.3 Antenna(s) 6 (Data: Lost): SERVO Azimuth and elevation motor faults. Unable to reset; antenna stowed. 30Apr 16:37:00 30Apr 17:39:00 C118139 1.00 62.0 Antenna(s) 10 (Data: Lost): SERVO Azimuth motor fault. Technician troubleshooting. 30Apr 15:39:00 30Apr 23:06:20 C118135 0.25 111.8 Antenna(s) 20 (Data: Lost): LO/IF L6 synthesizer for IFs A & C occasionally loses lock at 3.59GHz. 30Apr 17:02:00 Inspected the VLB instrumentation. No problems found. 30Apr 18:19:00 Inspected the VLB instrumentation. No problems found. 30Apr 19:20:00 Inspected the VLB instrumentation. No problems found. 30Apr 20:38:00 Inspected the VLB instrumentation. No problems found. 30Apr 21:53:00 Your new operator(s) is(are): Bob Stupak 30Apr 22:08:00 Ran a backup on the Modcomp partition. 30Apr 22:10:00 Inspected the VLB instrumentation. No problems found. 30Apr 22:00:00 30Apr 23:06:20 C118139 0.20 13.3 Antenna(s) 10 (Data: Corrupted): SERVO Antenna 10 azimuth motor faults occasionally causing antenna10 to fall out of digital position mode. 30Apr 23:02:55 30Apr 23:06:20 RFI 22.00 75.2 All antennas (Data: Corrupted): INTERFERENCE Tsys fluctuations caused by RFI on all four IFs. End Time Total Program Time % Downtime Total Downtime (in minutes) (in minutes) 04/30/06 23:06:20 12204.0 24.3% 2969.6