2025 Session I (c251)

    Correlation Status

    Project

    Code

    Block

    Code

    Sources DOYS UT Freq Stations Status PI Comment
      f251a       86 GHz        
      c251a       43 GHz        
      mj008       43 GHz       Americas only
      c251b       86 GHz        
      c251c       86 GHz        
      c251d       86 GHz        

    General comments

    Mark6 modules are listed in the C251 media distribution plan

    ATCA pulled from observations.

    APEX observed 86G in receiver LSB, as in Autumn 2024, but this time reverted back to a built-in crappier modular 1st LO synthesizer rather than an Agilent bench top synthesizer. These simple modular LO synth(s) (from VDI Inc and Holzworth) have a tuning-dependent numerical inaccuracy, leading to an APEX LO offset that was ca +8.94 Hz for the 86 GHz GMVA tracks.

    APEX in DW Kim's 104/114G track had LO offsets of +21.536 Hz ( -21.50 Hz) at 104 GHz, and -8.357 Hz (+8.50 Hz) at 114 GHz. VEX channel definitions are in the APEX frequency spreadsheet on the tabs named Daewon Test 104G USB Hi and 114G USB Hi.

    NOEMA tunings for the 104 GHz and 114 GHz portions of C251Z translate into VEX chan_defs that (please double check) can be generated with

    noema-vex-defs.py -r 3 -f 95.788 | grep U   # matches spreadsheet
    noema-vex-defs.py -r 3 -f 107.004 | grep L  # NB: edit VEX CH13-CH15/CH61-CH64 to match spreadsheet
    
    E-transfer of VLBA Sc Hn

    Attempts at using jive5ab/m5copy failed (firewall issues at NRAO?), but etc/etd worked out fine:

    evlbi@eportal1:~> etc -m 5 --resume --udt-bw 1000Mbps --udt-mss 1500 'tcp://146.88.10.50#40010:/vlba-bgfs-vol/outbound_staging/hn/c251a/*'  /data/c251a/Hn/
    evlbi@eportal1:~> etc -m 5 --resume --udt-bw 1000Mbps --udt-mss 1500 'tcp://146.88.10.50#40010:/vlba-bgfs-vol/outbound_staging/hn/c251d/*'  /data/c251d/Hn/
    
    evlbi@eportal1:~> etc -m 5 --resume --udt-bw 1000Mbps --udt-mss 1500 'tcp://146.88.10.50#40010:/vlba-bgfs-vol/outbound_staging/sc/c251a/*'  /data/c251a/Sc/
    evlbi@eportal1:~> etc -m 5 --resume --udt-bw 1000Mbps --udt-mss 1500 'tcp://146.88.10.50#40010:/vlba-bgfs-vol/outbound_staging/sc/c251d/*'  /data/c251d/Sc/
    
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