BasisChange_C3

Covariance [C3] matrix - Elliptical Basis Change

Description:

This function offers the possibility to transform (3x3) complex Covariance [C3] matrix polarimetric data sets represented in a polarization basis to (3x3) complex Covariance [C3] matrix polarimetric data sets represented in an user defined basis.

The change of basis is performed by the way of Special Unitary operators from SU(3).

Important Note: This program assumes that the input (3x3) complex Covariance [C3] matrices are defined in the (H,V) basis. Users wishing to transform data sets defined in another polarization have to take this fact into account. Comments:

Blue Parameters may be modified using the widget button : .

Red Parameters can be modified from keyboard.

Input/Output Arguments:

Input Directory Indicates the location of the considered Main Directory / C3 (MD / C3) containing the polarimetric data sets.

Output Directory Indicates the location of the data output directory.

The default value is set automatically to :

?Main Directory_LIN / C3 if the Linear +45°/-45° basis change is selected.

?Main Directory_CIR / C3 if the Circular basis change is selected.

?Main Directory_ELL / C3 if the Elliptical basis change is selected.

Output Image Number of Rows/Columns:

The output image numbers of rows and columns are initialised to the input data set dimensions.

Users wishing to process a sub-part of the initial image can modify the Init and End values of the converted images rows and columns.

Note: init and end values have to remain within the range defined by the input image dimensions.

Processing Parameters:

If Elliptical Basis Change is selected, the geometrical parameters defining the basis change have to be provided.

Orientation Angle Users have to set the value of the ellipse orientation angle of the new elliptical polarisation basis.

This angle belongs to the range [-90°, +90°].

Note: The orientation angle is automatically fixed to +45° in the Linear Basis Change case and to 0° in the Circular Basis Change case.

Ellipticity Angle Users have to set the value of the ellipse ellipticity angle of the new elliptical polarisation basis.

This angle belongs to the range [-45°, +45°].

Note: The ellipticity angle is automatically fixed to 0° in the Linear Basis Change case and to +45° in the Circular Basis Change case.

Trace Messages:

Open Window Elliptical Basis Change

Process The Function Soft/basis_change/basis_change_C3.exe Check RunTime Errors

OK

Close Window Elliptical Basis Change