My work on the FACETs project
I have a copy of the CORDEX variable requirements on our website: https://na-cordex.org/sites/default/files/na-cordex/CORDEX_variables_requirement_table.pdf
We're collecting a subset of those variables for the NA-CORDEX archive: https://na-cordex.org/variable-list
In general, we're adhering to the CORDEX specs for the FACETS run, so the requirements for the grids would come from there: https://na-cordex.org/sites/default/files/na-cordex/cordex_archive_specifications.pdf
:projection = "ROTMER" ;
:grid_size_in_meters = 25000. ;
:latitude_of_projection_origin = 46.5 ;
:longitude_of_projection_origin = 263. ;
:grid_north_pole_latitude = 46.5 ;
:grid_north_pole_longitude = 263. ;
:grid_factor = 0. ;
lat,lon lower left corner 3.09 -131.19
lat,lon upper right corner 55.859 -8.09
jx -4750000.0 to 4750000
iy -4050000 to 4050000
$ invproj -f "%f" +proj=omerc +lat_0=46.5 +alpha=90.0 +lonc=263.0 +x_0=0. +y_0=0. +ellps=sphere +a=6371229.0 +b=6371229.0 +units=m +no_defs
-4750000 -4050000
-131.190746 3.096919
4750000 4050000
-8.094820 55.858988
:projection = "ROTMER" ;
:grid_size_in_meters = 12000. ;
:latitude_of_projection_origin = 37.5 ;
:longitude_of_projection_origin = 264. ;
:grid_north_pole_latitude = 37.5 ;
:grid_north_pole_longitude = 264. ;
:grid_factor = 0. ;
jx[0] = -3936000
iy[0] = -2832000
ix[-1] = 3936000
iy[-1] = 2832000
xlat[0,0] = 6.8826475
xlon[0,0] = -128.01791
xlat[-1,-1] = 51.450836
xlon[-1,-1] = -38.367317
invproj -f "%f" +proj=omerc +lat_0=37.5 +alpha=90.0 +lonc=264.0 +x_0=0. +y_0=0. +ellps=sphere +a=6371229.0 +b=6371229.0 +units=m +no_defs
-3936000 -2832000
-128.017913 6.882647
3936000 2832000
-38.367318 51.450835
:CEN_LAT = 46.f ;
:CEN_LON = -97.f ;
:TRUELAT1 = 35.f ;
:TRUELAT2 = 60.f ;
:MOAD_CEN_LAT = 46.f ;
:STAND_LON = -97.f ;
:POLE_LAT = 90.f ;
xsz = 158 ysz = 150
XLAT,XLONG lowerleft = -127.087 7.71317
XLAT,XLONG upperright = -13.62 58.4
actual cordex file
xsz = 148 ysz = 140
lowerleft = -126.0373 10.15
upperright = -19.618 59.35
invproj -f "%f" +proj=lcc +lat_1=35 +lat_2=60 +lat_0=46 +lon_0=-97. +a=6370000 +b=6370000 +towgs84=0,0,0 +units=m +no_defs
-3925000. -3725000.
-127.087241 7.713160
3925000. 3725000.
-13.629138 58.541067