From observe@banshee.VLA.NRAO.EDU Fri Dec 1 23:10:14 1995 X-Sender: observe@banshee.vla.nrao.edu (Unverified) Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="============_-1394237887==_============" Date: Sat, 2 Dec 1995 06:10:36 +0000 To: tbeasley@aoc.nrao.edu From: observe@banshee.VLA.NRAO.EDU (VLA Operators) Subject: Observe log for BB43 Cc: vlbiobs@aoc.nrao.edu Content-Length: 10452 --============_-1394237887==_============ Content-Type: text/plain; charset="us-ascii" --============_-1394237887==_============ Content-Type: text/plain; name="BB43_95Dec01_1229.Text"; charset="us-ascii" Content-Disposition: attachment; filename="BB43_95Dec01_1229.Text" ************************************************************************ Program: BB43 Observer: T. Beasley / T. Bastian Date: Friday, Dec 1 1995 User Number: 600 Source File: 761BB43A Subarray: #1 Observe Mode: Phased Array Operator: Dave Thomas ** Weather Information ** Time Dew Point Temp. Wind Bar. Pressure Remarks: 95Dec01 18:01:18 -0.1C 13.4C W @ 3.5 m/s 791.7mbars The sky is clear. 95Dec01 18:32:26 0.8C 14.6C WNW @ 3.5 m/s 791.1mbars The sky is clear. 95Dec01 23:12:00 3.1C 18.8C WNW @ 3.6 m/s 789mbars The sky is clear. 95Dec02 02:33:18 -4.9C 10C WSW 2.4 M/S 790mbars The sky is clear. 95Dec02 05:29:21 -1.1C -0.9C N 1.1 m/s 791mbars The sky is clear. ** Visibility Tape Information ** Tape # File # Time of Final Record: N6785 1 ** Monitor Tape Information ** Tape # File # Time of Final Record: N6780 1 95Dec02 at 0:00:00 N6780 2 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 23 24 25 27 28 ** Operator Comments ** Start Time End Time Form # Ant # Downtime 95Dec01 16:57:40 (in Minutes) Starting program: BB43, observe file: 761BB43A. Start Time End Time Form # Ant # Downtime 95Dec01 17:00:00 On source 1229+020 with all available antennas. The band(s) used is(are) U C K X band(s). Start Time End Time Form # Ant # Downtime 95Dec01 16:57:40 The on-line baseline parameters for antenna(s) 20 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. Start Time End Time Form # Ant # Downtime 95Dec01 16:57:40 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 95Dec01 17:12:00 Other Antenna(s) 2 - LOCAL OSC Problem(s); Local oscillator phase jump, cycle slip. Observing Data: Corrupted Start Time End Time Form # Ant # Downtime 95Dec01 17:16:00 Other Antenna(s) 16 27 - OTHER (Miscellaneous equipment) Problem(s); Due to the subreflector problems with Antenna 27, we are now going to use Antenna 16 as reference for phased array observations. Its position is BE1. A few records of data will be lost when I do the skip to read the new rot file, but data should otherwise be unaffected. Start Time End Time Form # Ant # Downtime 95Dec01 17:22:00 95Dec01 17:36:17 Other 1.00 14.28 Antenna(s) 8 - FOC ROT (Focus & Rotation mount and controls) Problem(s); Antenna is stowed to allow engineers to inspect the focus-rotation mount. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec01 17:26:00 95Dec01 18:00:00 14658 1.00 34.00 Antenna(s) 2 - FOC ROT (Focus & Rotation mount and controls) Problem(s); Antenna is stowed for inspection of rotation drift problem. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec01 17:36:05 95Dec01 18:10:00 14674 1.00 33.92 Antenna(s) 27 - FOC ROT (Focus & Rotation mount and controls) Problem(s); Antenna is stowed for inspection of the drive faults in rotation. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec01 17:51:10 95Dec01 17:55:30 Other 1.00 4.33 Antenna(s) 22 - CRYOGENICS (Cryogenic and vacuum hardware) Problem(s); Antenna is stowed to allow cryo group to charge compressors. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec01 18:30:00 95Dec01 19:02:40 14675 1.00 32.67 Antenna(s) 6 - FIRE ALARM (Fire alarms in buildings & antennas) Problem(s); Antenna is stowed for inspection of false fire alarm indication. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec01 18:32:50 95Dec01 20:44:00 14676 1.00 131.17 Antenna(s) 17 - SERVO (Antenna ACU, Encoders, Translators) Problem(s); Antenna is stowed for recurring azimuth oscillations of up to two degrees at 297 degrees antenna azimuth. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec01 18:46:00 RMS phasing is around 3 degrees for all IFs. Start Time End Time Form # Ant # Downtime 95Dec01 18:50:00 VLBA tape SVLB0097 EA91 is mounted and now taking data. Start Time End Time Form # Ant # Downtime 95Dec01 19:04:44 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec01 19:06:00 RMS phasing around 3 degrees for all IFs. Start Time End Time Form # Ant # Downtime 95Dec01 19:18:00 Sent observe log BL26_95Dec01_1081 to alobanov@nrao.edu Start Time End Time Form # Ant # Downtime 95Dec01 20:00:30 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec01 20:02:00 RMS phasing is around 3 degrees for all IFs. Start Time End Time Form # Ant # Downtime 95Dec01 21:00:12 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec01 21:25:00 RMS phasing is around 5 degrees for all IFs. Start Time End Time Form # Ant # Downtime 95Dec01 22:03:00 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec01 22:25:00 RMS phasing is around 3 degrees for all IFs. Start Time End Time Form # Ant # Downtime 95Dec01 22:47:00 **** C. Barham & K. Malolepszy is your operator. **** Start Time End Time Form # Ant # Downtime 95Dec01 23:12:00 VLBA tape VLBA1086 D600 is mounted and taking data. Start Time End Time Form # Ant # Downtime 95Dec01 23:50:00 Antenna(s) 13 - VLA CORREL (VLA Correlator) Problem(s); The integrator card for DCS 0D, QUAD/IF 2 was exchanged and unexchanged at this time. One record of data lost. Observing Data: Lost Start Time End Time Form # Ant # Downtime 95Dec02 00:13:38 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec02 00:48:30 95Dec02 00:56:00 14680 1.00 7.50 Antenna(s) 12 - HVAC (Heating, Ventilation, A/C) Problem(s); Antenna vertex room temperature is cycling above 30 degrees (out of limits). Antenna has been parked so vertex room door can be opened. Observing data: Lost. Start Time End Time Form # Ant # Downtime 95Dec02 01:14:57 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec02 01:33:00 RMS phasing is around 1-2 degrees for all IFs. Start Time End Time Form # Ant # Downtime 95Dec02 02:04:30 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec02 03:10:36 The telescope operator made an inspection of the VLB instrumentation. No problems found. Start Time End Time Form # Ant # Downtime 95Dec02 03:29:00 95Dec02 03:31:50 Other 0.50 1.42 Antenna(s) 21 - FRONT END (Front end hardware) Problem(s); Antenna front end did not set up properly after source change. Done manually through front end overlay. Observing Data: Corrupted Start Time End Time Form # Ant # Downtime 95Dec02 03:19:30 VLBI observations have stopped as scheduled, VLA observations are continuing until end of observe file. Start Time End Time Form # Ant # Downtime 95Dec02 04:57:02 End of program BB43. Total Downtime = 259.3 minutes (1.3% of total time). 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