isofit.surface.surface_glint_model
Classes
A model of the surface based on a collection of multivariate |
Module Contents
- class GlintModelSurface(full_config: Config)[source]
Bases:
isofit.surface.surface_multicomp.MultiComponentSurfaceA model of the surface based on a collection of multivariate Gaussians, extended with two surface glint terms (sun + sky glint).
- Sa(x_surface, geom)[source]
Covariance of prior distribution, calculated at state x. We find the covariance in a normalized space (normalizing by z) and then un- normalize the result for the calling function.
- fit_params(rfl_meas, geom, *args)[source]
Given a reflectance estimate and one or more emissive parameters, fit a state vector.
- calc_rfl(x_surface, geom)[source]
Direct and diffuse Reflectance (includes sun and sky glint).
Inputs: x_surface : np.ndarray
Surface portion of the statevector element
- geomGeometry
Isofit geometry object
Outputs: rho_dir_dir : np.ndarray
Reflectance quantity for downward direct photon paths
- rho_dif_dirnp.ndarray
Reflectance quantity for downward diffuse photon paths
Note
Here, we treat direct and diffuse photon path reflectance differently. The sun and sky glint magnitudes are statevector elements that interact with the two reflectance quantities independently.
- drfl_dsurface(x_surface, geom)[source]
Partial derivative of reflectance with respect to state vector, calculated at x_surface.
- drdn_dglint(L_tot, L_down_dir, s_alb, rho_dif_dir)[source]
Derivative of radiance with respect to the direct and diffuse glint terms
- drdn_dsurface(rho_dif_dir, drfl_dsurface, dLs_dsurface, s_alb, t_total_up, L_tot, L_down_dir)[source]
Derivative of radiance with respect to full surface vector
- analytical_model(background, L_down_dir, L_down_dif, L_tot, geom, L_dir_dir=None, L_dir_dif=None, L_dif_dir=None, L_dif_dif=None)[source]
Linearization of the glint terms to use in AOE inner loop. Function will fetch the linearization of the rho terms and add the matrix components for the direct glint term. Currently we set the diffuse glint scaling term to constant value, which makes the AOE inner loop inversion possible.