Zero Temperature Jacobian for model top level (to limit sensitivity of radiances to model top biases).
Simplify & clean existing code.
Handle fractional sea-ice information coming from Polar-WRF model.
Since the "Gamma" bias correction and AIRS MMR Cloud Detection need a modified version of CRTM, the corresponding code has been put under the compilation test "#ifdef CRTM_MODIF".
Modified routines
var/da/da_radiance/da_transform_xtoy_crtm.inc
var/da/da_radiance/da_transform_xtoy_crtm_adj.inc
var/da/da_radiance/da_get_innov_vector_crtm.inc
...