PSPHDW

Description

Estimate the power contributions for plate, helix, diplane and wire.

Parameters

Name	Type	Length	Value range
Input: Input fully polarimetric SAR image *	Raster port	1 -
Output: Output total power image *	Raster port	1 -

* Required parameter

Parameter descriptions

Input: Input fully polarimetric SAR image

The name of the input polarimetric SAR data set. The input data set must contain either non-symmetrized or symmetrized fully polarimetric (quad-polarization complex) data in scattering, covariance, coherence, or Kennaugh format. The input can be either single-look or multi-look (multi-look is highly recommended). Multi-look can be achieved by applying a polarimetric filter (PSBOXCAR or PSPOLFIL) prior to computing the decomposition.

The input data must be a data set that has already been imported in PCIDSK (.pix) format by SARINGEST. Alternatively, it can be the key-file name of any GDB-supported POLSAR data set in its distribution format. For more information, and a complete list of supported POLSAR sensors and data products, see SARINGEST.

Output: Output total power image

The specified file must not already exist.

Details

The total power for each pixel is decomposed into contributions from plate, helix, diplane, and wire.

Algorithm

Convert the input to symmetrized coherence matrix. Compute the helix (Ph) power as twice the magnitude of the imaginary part of the T23 element. The wire contribution (Pw) is computed as sqrt((4*real part of T12)**2 + T13**2). The surface contribution is computed as T11-Ph/2 and the double-bounce power (Pd) as T22+T33-Ph-Pw/2.