USAGE:                 This page                list of available variables, processed and averaged
  where VARNAME is a variable from the list, t1,t2 are start/end times in the format year:month:day:hour:minute:second
        AVE is the averaging interval (15 60 300 900 3600) in seconds, for DMSP also "2"
        GAPS open: data left out, filled: gaps are filled with -1.0e31