Selecting parameters and discriminators

After you select a target mode and a target, you can generate parameter and discriminator information. The parameters available depend on the target-selection mode.

To select parameters and discriminators

In the SAR Polarimetry Target Analysis window, under Target Selection Mode, select a mode.
In the Target Selection window, click a target pixel.
In the SAR Polarimetry Target Analysis window, if not displayed actively, expand Numerical Output.
Under Parameters and Discriminators, select one or more of the following check boxes:
- Total power
- Pedestal height
  Note: Pedestal height information can be obtained for MLC data products only.
- Pauli components
  Note: Pauli components are available for SLC data products only.
- van Zyl classification
- Freeman-Durden parameters
- Cloude-Pottier classification
- Polarimetric discriminators
- Touzi decomposition
- H\A\a\B

Click Compute.

The following are examples of the information displayed in the Results box, depending on the selected parameters and discriminators:

Total Power: 0.505 (linear)

Pedestal Height: 0.098 (linear)

Pauli Components
Alpha: 	3.199 + 1.348i
Beta: 	0.192 + 0.206i
Gamma: 	-0.512 - 1.069i
Delta: 	-0.047 - 0.076i

Van-Zyl Classification
Unclassified: 0%
Odd Number of Reflections: 0%
Even Number of Refections: 0%
Diffuse Scattering: 100%

Freeman-Durden Parameters
Power contributions due to double-bounce: 0.0471416
Power contributions due to volume scattering: 0.170353
Power contributions due to rough surface: 3.72529e-009

Cloude-Pottier Classification
Zone 0 Undefined (neutral): 0%
Zone 1 High Entropy, Anisotropic, Multiple Scattering: 0%
Zone 2 High Entropy, Anisotropic, Volume Scattering: 0%
Zone 3 Medium Entropy, Anisotropic, Multiple Scattering: 6.25%
Zone 4 Medium Entropy, Anisotropic, Volume Scattering: 0%
Zone 5 Medium Entropy, Anisotropic, Surface Scattering: 0%
Zone 6 Low Entropy, Anisotropic, Multiple Scattering: 0%
Zone 7 Low Entropy, Anisotropic, Volume Scattering: 0%
Zone 8 Low Entropy, Anisotropic, Surface Scattering: 0%
Zone 9 High Entropy, Isotropic, Multiple Scattering: 12.5%
Zone 10 High Entropy, Isotropic, Volume Scattering: 62.5%
Zone 11 Medium Entropy, Isotropic, Multiple Scattering: 12.5%
Zone 12 Medium Entropy, Isotropic, Volume Scattering: 6.25%
Zone 13 Medium Entropy, Isotropic, Surface Scattering: 0%
Zone 14 Low Entropy, Isotropic, Multiple Scattering: 0%
Zone 15 Low Entropy, Isotropic, Volume Scattering: 0%
Zone 16 Low Entropy, Isotropic, Surface Scattering: 0%

Polarimetric Discriminators
Maximum of the degree of polarisation: 0.191126
Minimum of the degree of polarisation: 0.0893274
Maximum of the completely polarised component element 1: 0.0352051
PSI angle for maximum of the completely polarised component: -10
CHI angle for maximum of the completely polarised component: 25
Minimum of the completely polarised component element 1: 0.0138887
PSI angle for minimum of the completely polarised component: 40
CHI angle for minimum of the completely polarised component: -10
Maximum of the completely unpolarised component: 0.165868
Minimum of the completely unpolarised component: 0.131147
Maximum of the receive power: 0.112421
Minimum of the receive power: 0.0655736
Maximum of the scattered intensity: 0.193027
Minimum of the scattered intensity: 0.150746
Coefficient of variation: 0.583288
Fractional Power: 0.263194

Touzi Decomposition
Psi Angle: 0.132041 deg
Dominant Eigenvalue: 0.466361
Touzi Alpha_S Parameter: 0.703647
Touzi Phase: 0.86118 deg
Tau Angle (Helicity): 0.0959396 deg

Entropy\Anisotropy\Alpha Angle\Beta Angle
Entropy: 0.93176
Anisotropy: 0.368645
Alpha Angle: 51.1321 deg
Beta Angle: 24.1982 deg
Eigenvalues - Lambda 1: 0.0413077
Eigenvalues - Lambda 2: 0.0323458
Eigenvalues - Lambda 3: 0.0149211
Real component of element 1 of Eigenvector 1: 0.743897
Imaginary component of element 1 of Eigenvector 1: 0.0828312
Real component of element 2 of Eigenvector 1: 0.347803
Imaginary component of element 2 of Eigenvector 1: 0.553653
Real component of element 3 of Eigenvector 1: 0.110714
Imaginary component of element 3 of Eigenvector 1: -0
Real component of element 1 of Eigenvector 2: 0.436035
Imaginary component of element 1 of Eigenvector 2: -0.456768
Real component of element 2 of Eigenvector 2: -0.739192
Imaginary component of element 2 of Eigenvector 2: -0.0958886
Real component of element 3 of Eigenvector 2: 0.213628
Imaginary component of element 3 of Eigenvector 2: -0
Real component of element 1 of Eigenvector 3: -0.180822
Imaginary component of element 1 of Eigenvector 3: 0.0910838
Real component of element 2 of Eigenvector 3: 0.123019
Imaginary component of element 2 of Eigenvector 3: -0.0420482
Real component of element 3 of Eigenvector 3: 0.970621
Imaginary component of element 3 of Eigenvector 3: 0

Note: If your data is unfiltered (that is, single-look), your results will be different for Cloude-Pottier and van Zyl classifications. SAR Polarimetry Target Analysis will calculate an average value for the specified target area and provide one numerical output result for each classification method.