SYNTHETIC APERTURE RADAR HYBRID-POLARITY METHOD AND ARCHITECTURE FOR OBTAINING THE STOKES PARAMETERS OF A BACKSCATTERED FIELD
First Claim
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1. A method for obtaining the Stokes parameters representing a backscattered field from a partial polarimetric synthetic aperture radar (SAR) comprising the steps of:
- transmitting a circularly polarized field by the SAR;
receiving a coherently dual linear polarized backscattered field; and
using data embedded in the received backscattered field to obtain the Stokes parameters.
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Abstract
A synthetic aperture radar hybrid-polarity method and architecture comprising transmitting circular polarization (by driving the orthogonal linear feeds simultaneously by two identical waveforms, 90° out of phase), and receiving horizontal (H) and vertical (V) linear polarizations, coherently. Once calibrated, the H and V single-look complex amplitude data are sufficient to form all four Stokes parameters, which fully characterize the observed backscattered field.
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Citations
12 Claims
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1. A method for obtaining the Stokes parameters representing a backscattered field from a partial polarimetric synthetic aperture radar (SAR) comprising the steps of:
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transmitting a circularly polarized field by the SAR; receiving a coherently dual linear polarized backscattered field; and using data embedded in the received backscattered field to obtain the Stokes parameters. - View Dependent Claims (2, 3, 4, 5)
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6. A partial polarimetric synthetic aperture radar (SAR) for obtaining the Stokes parameters representing a backscattered field comprising:
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a dual linearly-polarized antenna comprising a horizontal (H) feed and a vertical (V) feed; a transmitter operatively connected to the antenna; a 90 degree hybrid operatively connected to the transmitter and the antenna for simultaneously driving the H and V feeds 90 degrees out of phase thereby causing the antenna to radiate a circularly polarized field; a receiver operatively connected to the antenna for receiving a coherent H and V linearly polarized backscattered field; and a processor operatively connected to the receiver for obtaining the Stokes parameters from data embedded in the backscattered field. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification