epam_mag_rate_stream::get_valid_systems

Source: stream/rate/Mag/Epam/epam_mag_rate_stream__get_valid_systems.pro

 epam_mag_rate_stream::get_valid_systems
        Return a list of valid coordinate systems for EPAM mag
        plots.

 Usage:
        slist = strref -> get_valid_systems()

 History:
        Original: 7/7/00; SJT