mltdir-bmdir angle generated by get_sd_vlshell is given a sign in such a way that
the angle is positive if the bmdir has a positive northward component in AACGM.
mltdir-bmdir angle generated by get_sd_vlshell is given a sign in such a way that
the angle is positive if the bmdir has a positive northward component in AACGM.
imported the initial ver of asciidump_scan.pro
Merge branch 'work' of ssh://iugonet1.stelab.nagoya-u.ac.jp/~/work/repo/SDtool_forERG into work

Conflicts:
	get_sd_vlshell.pro
completed: asciidump_scan.pro
imported: sd_scan_median_filter.pro
added beamt and nbeam elements to the get_scan_struc_arr structure
Merge branch 'work' of ssh://iugonet1.stelab.nagoya-u.ac.jp/home/g3/horit/work/repo/SDtool_forERG into work
Set the color number for values greater than the zlim max to clmax-1, instead of clmax
implemented rgrange keyword and pixelonly keyword to overlay_map_sdfov
implemented nogrid and twohourmltgrid keywords to sd_map_set
added the idldoc to asciidump_scan.pro
commented out some lines for debugging
editted the header documents for several procedures
imported sd_latlt_grid.pro. Accordingly sd_map_set calls this new
routine internally, instead of using map_grid directly
updated SD station codes and some minor modifications were made
for erg_load_sdfit
implemented color, linethick, and twohourmltgrid keywords for sd_latlt_grid
readded _extra=source for file_retrieve() in erg_load_sdfit.pro
because no_download keyword does not work properly
set_coords supports 'mlt'
added nooriginpoint keyword to overlay_map_vec