# ARTS built-in documentation server

## Workspace Method surfaceFlatRvRh

### Description

Creates variables to mimic specular reflection by a (flat) surface
where surface_rv_rh is specified.
This method assumes that the reflection at vertical and horizontal
polarisation differs. As power reflection coefficients are provided
there is no information at hand on phase shifts between polarisations,
and they are simply assumed to be zero. These assumptions result in
that surface_emission is set to zero for positions corresponding to
U and V, and that all diagonal elementsof surface_rmatrix are equal
(the mean of rv and rh). Further, all off-diagonal elements of
surface_rmatrix are all zero except for (0,1) and (1,0).

**Authors: **Patrick Eriksson

### Synopsis

surfaceFlatRvRh( | surface_los, surface_rmatrix, surface_emission, f_grid, stokes_dim, atmosphere_dim, rtp_pos, rtp_los, specular_los, surface_skin_t, surface_rv_rh ) |

### Variables