From observe@banshee.VLA.NRAO.EDU Fri Dec 29 23:24:10 1995 X-Sender: observe@banshee.vla.nrao.edu (Unverified) Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="============_-1391817853==_============" Date: Sat, 30 Dec 1995 06:24:31 +0000 To: pdiamond@banshee.VLA.NRAO.EDU, vlbiobs@banshee.VLA.NRAO.EDU From: observe@banshee.VLA.NRAO.EDU (VLA Operators) Subject: bd27 log, part 1 Content-Length: 7854 --============_-1391817853==_============ Content-Type: text/plain; charset="us-ascii" --============_-1391817853==_============ Content-Type: text/plain; name="BD027_95Dec29_881.Text"; charset="us-ascii" Content-Disposition: attachment; filename="BD027_95Dec29_881.Text" ************************************************************************ Program: BD027 Observer: Diamond Date: Friday, Dec 29 1995 User Number: 600 Source File: 789BD27 Subarray: #2 Observe Mode: Single Dish Operator: Jim Nieri ** Weather Information ** Time Dew Point Temp. Wind Bar. Pressure Remarks: 95Dec29 18:43:51 -9.4C 4.2C nw at 5 M/S 788mbars Sky Cover is 20%. Stratusform type. 95Dec29 21:25:20 -7.6C 5.9C nw at 5 m/s 787.1mbars Sky Cover is 10%. Stratusform type. 95Dec29 22:52:05 -8C 5.1C WNW at 6.5 m/sec 788mbars The sky is clear. 95Dec30 02:32:16 -10.2C 0.2C W at 1.5 m/sec 788mbars The sky is clear. 95Dec30 05:17:34 -10.2C -2.6C SW at 3.5 m/sec788mbars The sky is clear. ** Visibility Tape Information ** Tape # File # Time of Final Record: N6881 1 95Dec30 at 4:49:54 N6882 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N6890 1 95Dec30 at 0:00:00 N6890 2 Antenna(s) Used: 27 ** Operator Comments ** Start Time End Time Form # Ant # Downtime 95Dec29 18:02:00 (in Minutes) Starting program: BD027, observe file: 789BD27. Start Time End Time Form # Ant # Downtime 95Dec29 18:06:00 On source 1740+096 with all available antennas. The feed de-icers are on. The band(s) used is(are) Q band(s). Start Time End Time Form # Ant # Downtime 95Dec29 18:02:00 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 Start Time End Time Form # Ant # Downtime 95Dec29 18:02:00 95Dec29 18:04:00 Human Error 1.00 2.00 OTHER (Miscellaneous Equipment) Problem(s); The File was skipped into in time . However a mistake in subarray one ( skipping out of the current file in sub1) made verification 2 minutes longer. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec29 18:04:00 95Dec29 18:10:00 Other 0.33 1.98 VLBA DAQ (VLBA Samplers and formatters) Problem(s); The last 3rd of the BBC were showing very low power levels. I called M. Claussen and we checked the cabling again. The Cable to IF/D cable 2 North was not seated properly, The cabling was checked and double -checked before the file was started.. The cabling may have come loose probably while brushing up against it. M. Claussen feels that the cabling set-up is not satisfactory and will work toward having a more secure cabling set-up, procedure. Thank you Mark! Start Time End Time Form # Ant # Downtime 95Dec29 18:10:00 95Dec30 06:15:00 Human Error 0.25 181.25 VLBA DAQ (VLBA Samplers and formatters) Problem(s); The last 2 BBC's show low to dead power levels, STILL. after resetting the cabling. D. Vanhorn and M. Claussen investigting. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec29 18:50:00 Human Error 0.00 OTHER (Miscellaneous Equipment) Problem(s); The power levels for the last two BBC' are due to HUMAN error. in the Frequency set-up by the principle investigator. There is nothing which can be done. M. Claussen consulted. The downtime is estimated in previous entry. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec29 19:25:28 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec29 18:02:00 The first of two VLBI tapes is VLBA0513, 4C45 on tape drive one. Start Time End Time Form # Ant # Downtime 95Dec29 20:05:34 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec29 21:04:00 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec29 22:17:46 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec29 22:52:07 **** Larry Brothers is your operator. **** Start Time End Time Form # Ant # Downtime 95Dec29 23:06:57 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 00:06:43 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 01:05:35 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 02:09:49 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 03:01:03 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 04:07:37 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 05:05:10 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 06:02:13 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec30 06:15:00 Continuing this log, weather blocks full. Start Time End Time Form # Ant # Downtime 95Dec30 06:15:00 End of program BD027. Total Downtime = 185.2 minutes (0.9% of total time). AsciiFileOut Version: 1.02 -- Version Date: July 10, 1995 --============_-1391817853==_============--