; ============================================================================================
  pro setup_grids,thresh,nthresh,lat_grid,nbin,type,ntype
; ============================================================================================
; Sets up the basic latitude and albedo threshold grids.
; Defines three basic 3C file TYPES.
; --------------------------------------------------------------------------------------------

; ---------------------------
; Define albedo thresholds.
; ---------------------------
nthresh=35
thresh=findgen(nthresh)+1.

; ------------------------------
; Set up latitude binning grid.
; ------------------------------
nbin=120
minlat=30
lat_grid=findgen(nbin/2)+minlat
lat_grid=[lat_grid,180-reverse(lat_grid)]

; -------------------
; Define file types.
; -------------------
type=['cld','all']
ntype=2

return
end