uleis_pad_stream::get_idf_info

Source: stream/pad/Pad/Uleis/uleis_pad_stream__get_idf_info.pro

 uleis_pad_stream::get_idf_info
        Return various stream IDF items.

 Usage:
        value = strref -> get_idf_info(<keys>)

 keywords:
        time    double  input   The time at which the value is needed.
        ending  double  output  The time at which the value ceases to
                                be valid
        aperture int    input   The aperture setting for which the
                                geometry is required (ignored for any
                                other option)

        sectors         If set, then return the number of sectors in the
                        channel.
        erange          If set, then return the energy range of the
                        channel. 
        unit            Get the unit for the data.

 History:
        Original: 17/5/00; SJT
        Much extended: 18/5/00; SJT
        Simplify geometry by using get_eff_geom method of IDF:
        26/5/00; SJT
        Add unit keyword: 27/4/01; SJT
        Added _extra key to swallow unused items: 24/7/01; SJT