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Program:       AH753                 Subarray(s):          #1
Observer(s):   Deidre Hunter         Operator(s):          Terry Bartelt
Date:          Friday, Jul 12 2002   Configuration:        B
User Number:   667                   Decommissioned:       27
Source File(s):   182H753            VLBI Ref. Ant:        
Observing Mode:  Line 2AC            VLB Antenna Pad:      
  

API (Atmospheric Phase Interfermeter) data can be found at http://www.aoc.nrao.edu/vla/html/PhaseMonitor/sitemon.html.
** Weather Information **
Time (IAT)     Dew Point (C)   Temp. (C)    Wind             Bar. Pressure (mbar)    API RMS Phase
02Jul12 08:53  11.1C           16.2C        N at 1.8 m/s     794.7mbars             
02Jul12 13:50  9.9C            14.5C        NW at 1.5 m/s    794.9mbars             

    Operator comments for the above weather entries.
     Sky Cover is 60%. Cumuloform type. 
     The sky is clear.

** Visibility Tape Information **
Tape #                 File #                  Time of Final Record:
   N16793               1                      02Jul12 at 11:04:27
   N16794               1                      02Jul12 at 13:19:06
   N16795               1                      

** Monitor Tape Information **
Tape #                 File #                  Time of Final Record:
   N16770               7                      

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 26 28 

** Operator Comments **

02Jul12 08:50:52
     Starting program: AH753,  observe file:  182H753.

02Jul12 08:53:40
     On source 2357-1141 with all available antennas. 
     The band(s) used is(are) L   band(s).

02Jul12 08:58:40
     On source with antennas 1, 2, 10 and 22. These antennas were late getting on
     source due to a long unwrap from the previous observation.

02Jul12 09:14:00
   Form #: C108974           # of Ants: 0.00               Downtime: 
     Antenna(s)  8 - LOCAL OSC (Local Oscillator) Problem(s); A 600
     MHz round trip phase jump may have occurred at this time. Please
     check your data for a phase jump. Observing Data: Unknown
     Effect

02Jul12 11:52:00
   Form #: C108974           # of Ants: 0.00               Downtime: 
     Antenna(s)  8 - LOCAL OSC (Local Oscillator) Problem(s); A 600
     MHz round trip phase jump may have occurred at this time. Please
     check your data for a phase jump. Observing Data: Unknown
     Effect

02Jul12 12:21:00 - 02Jul12 12:47:40
   Form #: Interference      # of Ants: 27.00              Downtime: 720.00
     INTERFERE (INTERFERENCE, RADIO FREQUENCY (RFI))
     Problem(s); Interference seen on all antennas on all IFs during this
     time. Observing Data: Corrupted

02Jul12 13:15:20 - 02Jul12 14:50:02
   Form #: C108260           # of Ants: 1.00               Downtime: 94.70
     Antenna(s) 21 - MECHANICAL (Mechanical  Structural Elements)
     Problem(s); Antenna parked for painting. Observing Data: Lost

02Jul12 13:50:50
     **** Jonathan Jakischa is your operator. ****

02Jul12 13:51:12
     Ran a backup on the Modcomp partition where observe files are kept.

02Jul12 13:34:00
   Form #: C108974           # of Ants: 0.00               Downtime: 
     Antenna(s)  8 - LOCAL OSC (Local Oscillator) Problem(s); A 600
     MHz round trip phase jump may have occurred at this time. Please
     check your data for a phase jump. Observing Data: Unknown
     Effect. Also happened again at 14:34

02Jul12 14:42:00 - 02Jul12 14:46:00
   Form #: Other             # of Ants: 1.00               Downtime: 4.00
     Antenna(s)  2 - OTHER (Miscellaneous) Problem(s); Antenna off
     source-likely due to AZ oscillations. Observing Data: Lost

02Jul12 14:50:02
     End of program AH753.  Total Downtime = 818.7 minutes (8.4% of total time).
     

AsciiFileOut Version: 1.11 -- Version Date: June 20, 1996
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