From observe@banshee.VLA.NRAO.EDU Sun Feb 4 20:30:34 1996 X-Sender: observe@banshee.vla.nrao.edu (Unverified) Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="============_-1388631472==_============" Date: Mon, 5 Feb 1996 03:30:53 +0000 To: jconway@oso.chalmers.se From: observe@banshee.VLA.NRAO.EDU (VLA Operators) Subject: Observe log (2 of 2) for BB45B day#56826 at 2200LST Cc: vlbiobs@aoc.nrao.edu Content-Length: 4350 --============_-1388631472==_============ Content-Type: text/plain; charset="us-ascii" --============_-1388631472==_============ Content-Type: text/plain; name="BB45B_96Feb04_969.Text"; charset="us-ascii" Content-Disposition: attachment; filename="BB45B_96Feb04_969.Text" ************************************************************************ Program: BB45B Subarray: #1 Observer: Montovani Operator: C W Barham Date: Sunday, Feb 4 1996 Configuration: BC User Number: 600 Decommissioned: 21 Source File: 826B45B VLBI Ref. Ant: 27 Observe Mode: Phased Array VLB Antenna Pad: BN2 ** Weather Information ** Time Dew Point Temp. Wind Bar. Pressure 96Feb04 23:53:28 -4.3C 11.5C W @ 4.4 m/s 795.5mbars 96Feb05 00:40:01 -5.2C 8.6C W @ 1.5 m/s 795.6mbars 96Feb05 01:45:46 -6.6C 4.5C W @ 2.7 m/s 796.2mbars 96Feb05 02:35:06 -6.8C 2.3C NE @ 1.2 m/s 796.9mbars 96Feb05 02:57:29 -6.7C 2.1C NE @ 0.4 m/s 797.1mbars Remarks: Operator comments for the above weather entries. The sky is clear. The sky is clear. The sky is clear. The sky is clear. The sky is clear. ** Visibility Tape Information ** Tape # File # Time of Final Record: N6983 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N6980 3 96Feb05 at 0:00:00 N6980 4 Antenna(s) Used: 2 3 5 6 7 8 10 11 12 13 14 16 17 18 19 20 22 24 25 26 27 28 ** Operator Comments ** 96Feb04 23:53:28 This is a continuation of log BB45B_96Feb04_968. 96Feb04 23:59:00 - 96Feb05 00:01:30 Form #: Other # of Ants: 1.00 Downtime: 2.50 Antenna(s) 2 - FRONT END (Front end) Problem(s); Antenna's Front-End failed to set up properly after source change, due to short source dwell times, the next source change was allowed to correct the problem. Observing Data: Lost 96Feb04 23:53:28 - 96Feb05 02:57:29 Form #: Other # of Ants: 4.00 Downtime: 736.07 Antenna(s) 1 9 15 23 - OTHER (Miscellaneous Equipment) Problem(s); The observer wanted these antennas (northernmost) out, in order to make a good C-array configuration with the rest. Observing Data: Lost 96Feb04 23:53:28 - 96Feb05 02:57:29 Form #: 15548 # of Ants: 1.00 Downtime: 184.02 Antenna(s) 4 - FOC ROT (Focus Rotation Mount and Controls) Problem(s); There is an unrepairable DRIVE fault in FOCUS. The antenna is out of the SUMS...Stowed. Observing Data: Lost 96Feb05 00:02:12 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Feb05 00:27:00 Observe log BB45B_96Feb04_968.Text was sent to VLBIOBS and to J.Conway. Observing Data: No Affect. 96Feb05 00:40:00 The array is phasing up with RMS values of (1)one to (2)two degrees. 96Feb05 01:01:13 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Feb05 01:30:27 The array is phasing up with RMS values of (2)two to (3)three degrees. 96Feb05 02:00:19 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Feb05 02:05:00 Antenna(s) 14 - LOCAL OSC (Local Oscillator) Problem(s); Local oscillator phase jump, cycle slip. Observing Data: Corrupted 96Feb05 02:24:00 - 96Feb05 02:26:37 Form #: Other # of Ants: 1.00 Downtime: 2.62 Antenna(s) 18 - FRONT END (Front end) Problem(s); Antenna's Front-End failed to set up properly after source change, due to short source dwell times, the next source change was allowed to correct the problem. Observing Data: Lost 96Feb05 02:40:35 The array is phasing up with RMS values of (1)one to (2)two degrees. 96Feb05 02:57:29 End of program BB45B. Total Downtime = 925.2 minutes (18.6% of total time). AsciiFileOut Version: 1.10 -- Version Date: January 17, 1996 --============_-1388631472==_============--