Introducing different options for horizontal interpolation of model variables to observation locations, which can be controlled through the namelist parameter "INTERP_OPTION":
- linear
- quadratic
- masked average (Field Mask: 1=valid, 0=invalid)
The default interpolation option is INTERP_OPTION=1 (linear interpolation)
The interpolation of pressure has been made consistent with the ones for temperature and humidity.
Modified/New routines
var/da/da_radiance/da_get_innov_vector_crtm.inc
var/da/da_radiance/da_radiance.f90
var/da/da_interpolation/da_interp_2d_partial.inc
var/da/da_interpolation/da_interp_lin_2d_partial.inc
var/da/da_interpolation/da_interp_msk_avg_2d_partial.inc
var/da/da_interpolation/da_interp_quad_2d_partial.inc
var/da/da_interpolation/da_interpolation.f90