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FIND

        LAS\FIND  [Append] [New_Data] [/ALL] [/LINE name] [/FREQUENCY f1 f2]
    [/NUMBER n1 n2] [/SCAN s1 s2] [/OFFSET o1 o2] [/SOURCE name] [/RANGE w e
    s  n]  [QUALITY q] [/TELESCOPE name] [/SUBSCAN s1 s2] [/ENTRY] [/SECTION
    name]

    FIND performs a search in the input file to build a new index, according
    to  selection criteria defined by the SET command. These criteria may be
    temporarily modified by the following options:
    /ALL             all versions of each scan are searched for
                     (if not present: only the last version)
    /LINE name       search by line name
    /FREQUENCY f1 f2 search by signal or image frequency value or range
    /NUMBER n1 n2    search for the specified range of observation numbers
    /ENTRY  n1 n2    search for the specified range of entry numbers
    /SCAN s1 s2      search for the specified range of scan numbers
    /SUBSCAN s1 s2   search for the specified range of subscan numbers
    /OBSERVED d1 d2  search for these dates (JJ-MMM-YYYY)
    /OFFSET a1 a2    search for these offsets
    /QUALITY q       search for the data of quality better than Q
    /RANGE w e s n   search for the specified range of offsets
    /SOURCE name     search by source name
    /TELESCOPE name  search for the telescope used
    /SECTION name    search for observations which have this section defined

    APPEND
    FIND by default overwrites the current index. Found observations may  be
    appended to the current index by specifying the argument APPEND ; an in-
    dex compression occurs to avoid duplication of scans in the index.

    FIND does not return an error if the index is empty,  but  the  variable
    FOUND  is set to 0. FOUND is always set to the number of observations in
    the index.

    Argument NEW_DATA can be used to wait until new data is present  in  the
    input  file.  This possibility is intended for sites where data acquisi-
    tion is done in CLASS format (Pico Veleta, Plateau de Bure) to use CLASS
    as an automated quick look facility. The behaviour is similar to that of
    command NEW_DATA, but all  selection  criteria  are  considered  and  no
    switching to a new observation type occurs.


Gildas manager 2011-09-07