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Program:       AH753                 Subarray(s):          #1
Observer(s):   Deidre Hunter         Operator(s):          Sonja Mendoza
Date:          Tuesday, Jul 9 2002   Configuration:        B
User Number:   667                   Decommissioned:       27
Source File(s):   179H753            VLBI Ref. Ant:        
Observing Mode:  Line, mode=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
02Jul09 09:06  12.5C           15.3C        WNW at 0.2       797mbars               
02Jul09 10:55  11.6C           13.7C        Calm.            797mbars               

    Operator comments for the above weather entries.
     Sky Cover is 30%. Stratusform type. 
     Sky Cover is 30%. Stratusform type. 

** Visibility Tape Information **
Tape #                 File #                  Time of Final Record:
   N16779               1                      02Jul09 at 9:11:42
   N16780               1                      02Jul09 at 11:26:42
   N16781               1                      02Jul09 at 13:41:41
   N16783               1                      

** Monitor Tape Information **
Tape #                 File #                  Time of Final Record:
   N16770               4                      

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 **

02Jul09 09:02:28
     Starting program: AH753,  observe file:  179H753.

02Jul09 09:05:20
     On source 2357-1141 with all available antennas. 
     The band(s) used is(are) L   band(s).

02Jul09 09:02:28 - 02Jul09 15:01:41
   Form #: C109031           # of Ants: 1.00               Downtime: 359.22
     Antenna(s) 22 - SERVO (Antenna ACU, Encoders, Translators)
     Problem(s); Antenna's subreflector will no longer move into
     position after it was struck by lightning. Observing Data: Lost

02Jul09 10:15:00 - 02Jul09 10:15:00
   Form #: Other             # of Ants: 0.00               Downtime: 0.00
     Antenna(s) 20 - LOCAL OSC (Local Oscillator) Problem(s); A
     600Mhz round-trip phase jump occurred at this time. Please check
     your data. Observing Data: Unknown Effect

02Jul09 12:56:40 - 02Jul09 13:07:00
   Form #: C108967           # of Ants: 1.00               Downtime: 10.33
     Antenna(s)  2 - CRYOGENICS (Cryogenics and Vacuum
     Hardware) Problem(s); Antenna parked to allow cryo techs. to
     investigate an X-band dewar refridgerator problem. Observing
     Data: Lost

02Jul09 13:09:15 - 02Jul09 15:01:41
   Form #: C108260           # of Ants: 1.00               Downtime: 112.43
     Antenna(s) 21 - MECHANICAL (Mechanical  Structural Elements)
     Problem(s); Antenna parked for painting. Observing Data: Lost

02Jul09 13:13:40 - 02Jul09 13:28:00
   Form #: C109013           # of Ants: 1.00               Downtime: 14.33
     Antenna(s) 17 - CRYOGENICS (Cryogenics and Vacuum
     Hardware) Problem(s); Antenna parked for cryo techs to check
     readbacks on 10-20 (VLA) dewar. Observing Data: Lost

02Jul09 13:29:00 - 02Jul09 13:50:00
   Form #: PM                # of Ants: 1.00               Downtime: 21.00
     Antenna(s) 10 - CRYOGENICS (Cryogenics and Vacuum
     Hardware) Problem(s); Antenna parked for cryo techs to perform
     preventive maintenance. Observing Data: Lost

02Jul09 13:41:41 - 02Jul09 14:14:45
   Form #: Software          # of Ants: 25.00              Downtime: 826.67
     TAPES (Magnetic tapes) Problem(s); Tape drive failed to start at
     switchover which caused MODCOMPS to crash. After attempts to
     restart tapes failed, entire system re-booted to clear problem.
     Observing Data: Lost

02Jul09 14:44:07 - 02Jul09 15:01:41
   Form #: PM                # of Ants: 1.00               Downtime: 17.57
     Antenna(s)  6 - MECHANICAL (Mechanical  Structural Elements)
     Problem(s); Mechanics performing re-pack of main bearing
     Observing Data: Lost

02Jul09 15:01:41
     End of program AH753.  Total Downtime = 1361.6 minutes (14.0% of total time).
     

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