The standard version of the QTCM1 provides coverage from 
S
to N in latitude
and coverage over all longitudes. The grid has
dimensions 
equal
to 64 
42. The east/west boundaries are periodic, and the
north/south boundaries are solid walls.
Thus, the grid spacing is 5.625 [i.e. 
] degrees
longitude and 3.75 [i.e. 
] degrees latitude.
The first index increments in the zonal (x)
direction with increasing longitude in the eastward direction, beginning at
0 degrees E longitude. The second index increments in the meridional (y)
direction with increasing latitude northward, beginning at S
latitude (i.e. 
latitude). Thus:
grid box (1,1) is centered at 
E longitude,
latitude
grid box (2,1) is centered at 
E longitude,
latitude
grid box (2,2) is centered at E longitude,
latitude
grid box ( 
)
is centered at 
E longitude,
latitude
The spatial array sizes nx and ny are
set in the module file qtcmmod.f90
Higher resolution can be easily achieved by modifying hgrid.h and
subroutine parinit. Higher resolution boundary data sets can be created
using a package released along with this version of model. See
Section 2.4.3 for details.
Section 3.2.2 has a more complete description of the
model grid.