BUFFERS UVCONT

          UVCONT  handles the intermediate (pseudo-)UV table created and used by
    command UV_MAP /CONT for Multi-Frequency-Synthesis. It is a valid 2-D UV ta-
    ble, but which have more than 1 visibility for the same  time  and  baseline
    pair,  with  different (frequency-scaled) (u,v) coordinates.  Such UV tables
    can be properly imaged, but not properly self-calibrated.