NAME: thm_data2load PURPOSE: returns a list of variables that can be loaded for a given THEMIS instrument. For the most part, it calls the appropriate thm_load routine with the /valid_names keyword set. The dataypes and valid_names keywords are used inconsistently in the thm_loads, and do not allow for the distinction between level2 data that is to be input from level2 files, and level2 data the is to be input from level1 files and calbrated, cotrans'ed, etc... but has the same name as an L2 variable. Designed to be called from thm_ui_valid_dtype.pro CALLING SEQUENCE: dtyp = thm_data2load(instrument, level) INPUT: instrument = the THEMIS instrument: one of: ['asi', 'ask', 'esa', 'efi', 'fbk', 'fft', 'fgm', 'fit', 'gmag', $ 'mom', 'scm', 'spin', 'sst', 'state', 'bau', 'hsk', 'trg'] level = 'l1' for any data that can be gotten from the l1 file -- including calibrated, etc... 'l2' for data gotten from L2 files. 'l10' for data that only is loaded from L1 files. For ESA data, 'L10' data and 'L1' data are gotten from the packet files. OUTPUT: dtyp = a string array that can be used as an input to the datatype keyword for the given instrument HISTORY: started on 31-Jan-2008, jmm, jimm@ssl.berkeley.edu, this is under development for the next 6 months or so. 9-apr-2008, jmm, added all instruments, for Version 4_00 $LastChangedBy: egrimes $ $LastChangedDate: 2014-04-30 15:55:39 -0700 (Wed, 30 Apr 2014) $ $LastChangedRevision: 14981 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/themis/common/thm_data2load.pro $