FIND NEW_DATA

        LAS\FIND NEW_DATA [/OPT1 ...]

    Argument  NEW_DATA  can  be used to find the new (and only new) observa-
    tions (if any) present in the input file. FIND options or equivalent SET
    tunings  apply.  If  no  new observations are present, the current index
    will be empty.

    FIND NEW_DATA does not wait for new data, but you can  use  the  command
    NEW_DATA to do so.

    This possibility is intended for sites where data acquisition is done in
    CLASS format (Pico Veleta, Plateau de Bure) to use CLASS as an automated
    quick look facility.