Intensity I, Stokes parameter Q, and degree of polarization P = Q/I (top). The solid lines show MYSTIC calculations and the dashed lines show results by Stam (2008). Lambertian surfaces with albedos 0, 0.2, and 1.0 are compared. For ocean and land surfaces (forest and grass) the surface properties are not exactly the same (see text for details). The small bottom plots show absolute differences between MYSTIC results and Stam (2008).