From observe@banshee.VLA.NRAO.EDU Fri Apr 5 16:58:53 1996 X-Sender: observe@banshee.vla.nrao.edu (Unverified) Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="============_-1383373782==_============" Date: Fri, 5 Apr 1996 23:59:02 +0000 To: pdiamond@nrao.edu From: observe@banshee.VLA.NRAO.EDU (VLA Operators) Cc: vlbiobs@nrao.edu Content-Length: 6335 --============_-1383373782==_============ Content-Type: text/plain; charset="us-ascii" --============_-1383373782==_============ Content-Type: text/plain; name="BD027C_96Apr05_82.Text"; charset="us-ascii" Content-Disposition: attachment; filename="BD027C_96Apr05_82.Text" ************************************************************************ Program: BD027C Subarray: #2 Observer: Diamond Operator: Larry Brothers Date: Friday, Apr 5 1996 Configuration: C User Number: 600 Decommissioned: 24 Source File: 887BD27 VLBI Ref. Ant: 27 Observe Mode: Single Dish VLB Antenna Pad: N8 ** Weather Information ** Time Dew Point Temp. Wind Bar. Pressure 96Apr05 15:02:59 -5.5C 1.7C E at 6.5 m/sec 791mbars 96Apr05 16:20:43 -5.8C 1.5C E at 8.5 792mbars 96Apr05 18:31:56 -5.6C 2.9C E at 9.5 m/sec 793mbars 96Apr05 22:59:21 -7.2C 5.1C e at 10 m/s 793.1mbars Remarks: Operator comments for the above weather entries. Sky Cover is 100%. Stratusform type. Sky Cover is 100%. Stratusform type. Sky Cover is 100%. Stratusform type. Sky Cover is 85%. Stratusform type. ** Visibility Tape Information ** Tape # File # Time of Final Record: N7179 1 96Apr05 at 16:10:37 N7180 1 96Apr05 at 22:18:38 N7181 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N7170 5 Antenna(s) Used: 27 ** Operator Comments ** 96Apr05 14:52:00 Starting program: BD027C, observe file: 887BD27. 96Apr05 14:52:00 On source 3C454.3 with all available antennas. The band(s) used is(are) Q band(s). 96Apr05 14:52:00 The on-line baseline parameters for antenna(s) 21 have recently been updated (prior to your observing run) to correct for errors resulting from their recent relocations. In the analysis of your data would you please check for any significant 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. 96Apr05 14:52:00 The Area Frequency Coordinator at White Sands Missile Range (New Mexico, USA) reports airborne electronic jamming which may be occurring now. It is not clear to us how long this activity will last. Cannon, New Mexico (USA) Air Force Base is supposed to let VLA Operations know before activities start. Here are frequencies affected: 1225 - 1270 MHz, 1340 - 1400 MHz, 2200 - 2290 MHz, 2300 - 2400 MHz, 2690 - 2704 MHz, 2714 - 2720 MHz, 2730 - 2735 MHz,2758 - 2880 MHz, 2855 - 2880 MHz, 4800 - 4990 MHz, 4990 - 5000 MHz, 7895 - 8030 MHz, 8030 - 8100 MHz, 8400 - 8500 MHz, 8500 - 8900 MHz, 8900 - 9000 MHz, 13400 - 13900 MHz, 14500 - 15300 MHz, 15400 - 15500 MHz The jamming is authorized at the frequencies listed until Oct 31, 96. If a complaint does occur, we can shut them down, since the authorization specifically says that the jamming can proceed at those frequencies as long as the exercise does not interfere with the VLA. Contact Clint Janes for further information and to make complaints. Clint Janes, VLA Frequency Coordinator/Phillip Hicks, VLA Operations 96Apr05 15:05:59 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 15:55:00 First part of log mailed to pdiamond and vlbiobs 96Apr05 16:05:00 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 17:02:47 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 18:02:34 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 19:01:34 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 20:07:56 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 21:03:11 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 22:05:18 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 21:47:00 - 96Apr05 22:00:00 Form #: Other # of Ants: 1.00 Downtime: 13.00 VLBA REC (VLBA recorder, formatters & plybk drives) Problem(s); VLBA tape drive #2 halted near beginning of a tape run, did NOT lose vacuum, picked up on schedule at 2202 but may miss another forward pass before reversing again; VLBA ops notified. Observing Data: Lost 96Apr05 22:17:00 - 96Apr05 22:30:00 Form #: Other # of Ants: 1.00 Downtime: 13.00 VLBA REC (VLBA recorder, formatters & plybk drives) Problem(s); VLBA tape was at end of reel when commanded to start a forward run, stopped right away, due to earlier problem; this run is lost, should pick up on schedule at 2232. Observing Data: Lost 96Apr05 22:32:00 Tape drive is back on schedule. 96Apr05 22:59:22 **** Jim Nieri is your operator. **** 96Apr05 23:00:00 The Comp uters check OK. 96Apr05 23:01:30 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Apr05 23:15:39 Ran a backup on the Modcomp partition where observe files are kept. 96Apr05 23:15:00 Another inspection of the time differential problem vme/formatter clocks revealed that the seconds were ahead this time. I talked to B. Willoughby about this. He did not know this had occurred earlier. A question as to whether it had occurred was discussed. 96Apr05 23:30:29 End of program BD027C. Total Downtime = 26.0 minutes (0.2% of total time). AsciiFileOut Version: 1.10 -- Version Date: January 17, 1996 --============_-1383373782==_============--