From observe@banshee.VLA.NRAO.EDU Fri Aug 9 18:19:21 1996 X-Sender: observe@banshee.vla.nrao.edu (Unverified) Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="============_-1372486148==_============" Date: Sat, 10 Aug 1996 00:19:38 +0000 To: jconway@oso.chalmers.se From: observe@banshee.VLA.NRAO.EDU (VLA Operators) Subject: Text copy of observe logs for BB64 Cc: vlbiobs@banshee.VLA.NRAO.EDU Content-Length: 13575 --============_-1372486148==_============ Content-Type: text/plain; charset="us-ascii" --============_-1372486148==_============ Content-Type: text/plain; name="BB64_96Aug09_1500.Text"; charset="us-ascii" Content-Disposition: attachment; filename="BB64_96Aug09_1500.Text" ************************************************************************ Program: BB64 Subarray: #1 Observer: J. Conway Operator: Phillip D. Hicks Date: Friday, Aug 9 1996 Configuration: D User Number: 600 Decommissioned: 23 Source File: 014BB64 VLBI Ref. Ant: 27 Observe Mode: Phased Array VLB Antenna Pad: N8 ** Weather Information ** Time Dew Point Temp. Wind Bar. Pressure 96Aug09 14:15:04 12.2C 14.5C ENE at 0.9m/sec 798.5mbars 96Aug09 15:02:32 13.2C 17.4C ENE at 1.2m/sec 798.3mbars 96Aug09 15:59:24 12.1C 19.6C N at 1.0m/sc 797.9mbars 96Aug09 17:13:28 12.6C 20.8C NE at 2.7m/sec 797.3mbars 96Aug09 18:18:13 12.4C 22.7C E at 1.9m/sec 796.4mbars Remarks: Operator comments for the above weather entries. Sky Cover is 100%. Stratusform type. Sky Cover is 100%. Stratusform type. Sky Cover is 90%. Stratusform type. Sky Cover is 90%. Cumuloform type. Sky Cover is 90%. Cumuloform type. Large thunderheads in all directions. ** Visibility Tape Information ** Tape # File # Time of Final Record: N7572 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N7560 5 Antenna(s) Used: 1 3 4 5 6 7 8 9 10 11 12 13 14 16 17 18 19 20 21 22 24 26 27 28 ** Operator Comments ** 96Aug09 13:57:37 Starting program: BB64, observe file: 014BB64. 96Aug09 14:03:30 On source 0736+017 with all available antennas. The band(s) used is(are) X band(s). 96Aug09 13:57:37 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. **** 96Aug09 13:57:37 - 96Aug09 14:12:00 Form #: Other # of Ants: 0.25 Downtime: 3.60 Antenna(s) 24 - LOCAL OSC (Local Oscillator) Problem(s); Not fringing on IF B. Noticed the clipper levels were out of range. Reseated the T5 module for IF B. IT WORKS NOW!!! :- ) Observing Data: Corrupted 96Aug09 13:57:37 - 96Aug09 16:56:20 Form #: 17675 # of Ants: 1.00 Downtime: 178.72 Antenna(s) 2 - IF TRANSMI (IF transmission) Problem(s); Antenna is experiencing Local Oscillator problems, to the extent that the antenna is dropping out of DPM(Digital Position Mode) excessively, antenna is parked due to most of the data was being flagged bad due to Control and Monitor problems brought on by the Local Oscillator problems. Observing Data: Lost. 96Aug09 13:57:37 - 96Aug09 18:19:30 Form #: 16954 # of Ants: 1.00 Downtime: 261.88 Antenna(s) 15 - MECHANICAL (Mechanical Structural Elements) Problem(s); Antenna parked to allow the Mechanical Group to continue painting the antenna. Observing Data: Lost 96Aug09 13:57:37 - 96Aug09 17:30:10 Form #: 17679 # of Ants: 1.00 Downtime: 212.55 Antenna(s) 25 - IF TRANSMI (IF transmission) Problem(s); Antenna lost data sets 0 - 4. Central T2 VCO voltages saturated. Swapped out T2 after consulting with R. Gallager, data sets still missing. Antenna Auto Stowed. Observing Data: Lost 96Aug09 13:57:37 Data is written to VLBI thin tape VLBA0577 946C 96Aug09 14:12:33 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. 96Aug09 15:01:36 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 15:20:06 Ran a backup on the Modcomp partition where observe files are kept. 96Aug09 15:58:19 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 16:07:00 - 96Aug09 16:10:50 Form #: Human Error # of Ants: 1.00 Downtime: 3.83 Oops! Hit the wrong button on the Wye-Comm monitor and sent a ACU reset to Antenna 10. The antenna did not track your source during this period. Observing data: Lost. 96Aug09 13:57:37 Antenna 26 has sporatic correlator messages coming. Check your data. Observing data: Unknow effect. 96Aug09 16:56:20 - 96Aug09 17:35:00 Form #: Other # of Ants: 0.25 Downtime: 9.67 Antenna(s) 2 - LOCAL OSC (Local Oscillator) Problem(s); Antenna 2 IF D's sychronous detector was out of range. Problem due to a sticky fluke relay. Observing Data: Corrupted 96Aug09 17:04:00 - 96Aug09 17:06:00 Form #: Other # of Ants: 1.00 Downtime: 2.00 Antenna(s) 12 - IF TRANSMI (IF transmission) Problem(s); Antenna 12 lost communications with the world! Do know what happened. Resetting the LO from the LO overlay fixed problem. Observing Data: Corrupted 96Aug09 17:01:49 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 18:01:55 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 18:19:29 Ending the log for program BB64. The new log due to the fact all the weather entry cells are full. 96Aug09 18:19:30 End of program BB64. Total Downtime = 672.2 minutes (9.5% of total time). AsciiFileOut Version: 1.11 -- Version Date: June 20, 1996 --============_-1372486148==_============ Content-Type: text/plain; name="BB64_96Aug09_1067.Text"; charset="us-ascii" Content-Disposition: attachment; filename="BB64_96Aug09_1067.Text" ************************************************************************ Program: BB64 Subarray: #1 Observer: J. Conway Operator: Phillip D. Hicks Date: Friday, Aug 9 1996 Configuration: D User Number: 600 Decommissioned: 23 Source File: 014BB64 VLBI Ref. Ant: 27 Observe Mode: Phased Array VLB Antenna Pad: N8 ** Weather Information ** Time Dew Point Temp. Wind Bar. Pressure 96Aug09 18:20:14 12.4C 22.7C E at 1.9m/sec 796.4mbars 96Aug09 19:05:19 11.1C 23.2C SE at 1.9m/sec 796.2mbars 96Aug09 20:00:03 10.5C 23.8C SE at 3.9m/sec 794.9mbars 96Aug09 20:58:00 18.2C 2.9C NW at 2.7m/sec 10.8mbars 96Aug09 21:57:25 11.9C 19.6C ESE @ 3.8 m/s 795.2mbars Remarks: Operator comments for the above weather entries. Sky Cover is 90%. Cumuloform type. Large thunderheads in all directions. Sky Cover is 90%. Cumuloform type. Showers nearby. Sky Cover is 90%. Cumuloform type. Showers nearby. Sky Cover is 100%. Cumuloform type. Raining! Sky Cover is 100%. Cumuloform type. ** Visibility Tape Information ** Tape # File # Time of Final Record: N7572 1 96Aug09 at 19:40:47 N7573 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N7560 5 Antenna(s) Used: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 26 27 28 ** Operator Comments ** 96Aug09 18:19:30 Starting program: BB64, observe file: 014BB64. 96Aug09 18:19:30 On source YZCMI with all available antennas. The band(s) used is(are) X band(s). 96Aug09 18:19:30 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. **** 96Aug09 18:19:30 This is a continuation of program BB64. The new log due to the fact all the weather entry cells are full. 96Aug09 18:19:30 - 96Aug09 18:57:30 Form #: 16954 # of Ants: 1.00 Downtime: 38.00 Antenna(s) 15 - MECHANICAL (Mechanical Structural Elements) Problem(s); Antenna parked to allow the Mechanical Group to continue painting the antenna. Observing Data: Lost 96Aug09 18:50:00 Rain nearby. Not raining at the Control Building. 96Aug09 19:04:14 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 19:59:26 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 20:20:30 - 96Aug09 20:58:00 Form #: 17682 # of Ants: 1.00 Downtime: 37.50 Antenna(s) 11 - MECHANICAL (Mechanical Structural Elements) Problem(s); Antenna 11 stow in preparation for painting. The techs are waterblasting it now. Observing Data: Lost 96Aug09 20:18:00 - 96Aug09 20:20:00 Form #: Other # of Ants: 1.00 Downtime: 2.00 Antenna(s) 20 - LOCAL OSC (Local Oscillator) Problem(s); Numerous LO messages from the antenna. May be due to a power glitch. Possible phase jumps here. Observing Data: Corrupted. 96Aug09 20:32:00 Form #: Other # of Ants: Downtime: Antenna(s) 2 - LOCAL OSC (Local Oscillator) Problem(s); Local oscillator glitch. 600 MHz round trip phase jump. Check your data carefully. Observing Data: Corrupted 96Aug09 20:38:00 Thunderstorm in progress. Much lightning and some rain. 96Aug09 20:57:14 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 20:39:30 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. 96Aug09 21:57:27 **** T. Perreault is your operator. **** 96Aug09 22:00:34 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 22:01:30 - 96Aug09 22:03:30 Form #: Other # of Ants: 1.00 Downtime: 2.00 Antenna(s) 8 - FRONT END (Front end) Problem(s); Antenna First Local Oscillator (F12) failed to lock up at source change. Subsequent source change corrected problem. All Front End CALS were 0.000, data flagged. Observing Data: Lost 96Aug09 23:02:59 The telescope operator made an inspection of the VLB instrumentation. No problems found. 96Aug09 23:05:22 Ran a backup on the Modcomp partition where observe files are kept. 96Aug09 23:35:30 - 96Aug09 23:56:00 Form #: 17684 # of Ants: 1.00 Downtime: 20.50 Antenna(s) 5 - FOC ROT (Focus Rotation Mount and Controls) Problem(s); Apex interface for subreflector has died -- getting no voltage readbacks. Unable to command subreflector. Antenna has been stowed. Observing Data: Lost 96Aug09 23:53:00 Monitor rates have been reset per instructions from D. Bagri prior to the start of his test file (which is next). Observing Data: No Effect 96Aug09 23:56:00 End of program BB64. Total Downtime = 100.0 minutes (1.1% of total time). AsciiFileOut Version: 1.11 -- Version Date: June 20, 1996 --============_-1372486148==_============--