Note: This page has been translated by MathWorks. Please click here

To view all translated materials including this page, select Japan from the country navigator on the bottom of this page.

To view all translated materials including this page, select Japan from the country navigator on the bottom of this page.

Copolarization and cross-polarization signatures

`resp = polsignature(rcsmat)`

`resp = polsignature(rcsmat,type)`

`resp = polsignature(rcsmat,type,epsilon)`

`resp = polsignature(rcsmat,type,epsilon,tau)`

`polsignature(___)`

returns
the normalized radar cross-section copolarization (`resp`

= polsignature(`rcsmat`

)*co-pol*)
signature, `resp`

(in square meters), determined
from the scattering cross section matrix, `rcsmat`

of
an object. The signature is a function of the transmitting antenna
polarization, specified by the ellipticity angle and the tilt angle
of the polarization ellipse. In this syntax case, the ellipticity
angle takes the values `[-45:45]`

and the tilt angle
takes the values `[-90:90]`

. The output `resp`

is
a 181-by-91 matrix whose elements correspond to the signature at each
ellipticity angle-tilt angle pair.

,
in addition, specifies the polarization signature type as one of `resp`

= polsignature(`rcsmat`

,`type`

)`'c'|'x'`

,
where `'c'`

creates the copolarization signature
and `'x'`

creates the cross-polarization (*cross-pol*)
signature. The default value of this parameter is `'c'`

.
The output `resp`

is a 181-by-91 matrix whose elements
correspond to the signature at each ellipticity angle-tilt angle pair.
This syntax can use the input arguments in the previous syntax.

,
in addition, specifies the transmit antenna polarization's ellipticity
angle (in degrees) as a length-`resp`

= polsignature(`rcsmat`

,`type`

,`epsilon`

)*M* vector. The angle `epsilon`

must
lie between –45° and 45°. The argument `resp`

is
a 181-by-*M* matrix whose elements correspond to
the signature at each ellipticity angle-tilt angle pair. This syntax
can use any of the input arguments in the previous syntaxes.

,
in addition, specifies the tilt angle of the polarization ellipse
of the transmitted wave (in degrees) as a length-`resp`

= polsignature(`rcsmat`

,`type`

,`epsilon`

,`tau`

)*N* vector.
The angle `tau`

must be between –90°
and 90°. The signature, `resp`

, is represented
as a function of the transmitting antenna polarization. The transmitting
antenna polarization is characterized by the ellipticity angle, `epsilon`

,
and the tilt angle, `tau`

. The argument `resp`

is
a *N*-by-*M* matrix whose elements
correspond to the signature at each ellipticity angle-tilt angle pair.
This syntax can use any of the input arguments in the previous syntaxes.

`polsignature(___)`

plots a three
dimensional surface using any of the syntax forms specified above.

[1] Mott, H. *Antennas for Radar and Communications*.John
Wiley & Sons, 1992.

[2] Fawwaz, U. and C. Elachi. *Radar Polarimetry
for Geoscience Applications*. Artech House, 1990.

[3] Lee, J. and E. Pottier. *Polarimetric Radar
Imaging: From Basics to Applications*. CRC Press, 2009.

Was this topic helpful?