Ims24km.gpd

; IMS Northern Hemisphere
; Polar Stereographic 24 km grid
; apparently 1 "bedient" along true latitude is 381 km.
; For a 1/16th mesh grid, then: 381/16 = 23.8125 km
; However, this scale does not match the values in the NOAA files
; ftp://sidads.colorado.edu/DATASETS/NOAA/G02156/metadata/imslat_24km.dat
; ftp://sidads.colorado.edu/DATASETS/NOAA/G02156/metadata/imslon_24km.dat
; so this scale is slightly smaller.
; 
; The NOAA locations in these files at the lower left corner of each grid cell.
;
; The Earth radius is assumed to to be 6371.2, based on
; http://www.nco.ncep.noaa.gov/pmb/docs/libs/w3lib/w3fb05.html
;
Map Projection:			Polar Stereographic
Map Reference Latitude:         90.0
Map Reference Longitude:        -80.0
Map Second Reference Latitude:  60.0
Map Equatorial Radius:          6371200 ; software w3fb05 documentation
Map Origin Latitude:             89.998344
Map Origin Longitude:            55.000000
Grid Map Origin Column:		511.5
Grid Map Origin Row:		511.5
Grid Map Units per Cell:	23684.997 ; slightly smaller than 1/16 bedient
Grid Width:			1024
Grid Height:			1024