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Polarimetric signature analysis of various crop-types using multi-source dual-frequency SAR data
Journal
Geocarto International
ISSN
10106049
Date Issued
2022-01-01
Author(s)
Verma, Abhinav
Haldar, Dipanwita
Bhattacharya, Avik
Abstract
The synthesized received power for every wave ellipticity ((Formula presented.)), and orientation ((Formula presented.)) angle describe the polarization signature (PS) of a target. Thus, it provides valuable information for target characterization. The PS of various crops at two frequencies (C- and L-band) is assessed in this study for various crops. It is observed that the volume scattering mechanism is mainly produced at C-band by the tall and medium height crops viz. Sugarcane, Maize and Finger Millet. The depolarized power is evident from such targets with the pedestal height (PH) ((Formula presented.)) values, ranging between 0.34 and 0.22. In contrast, we noticed that the surface scattering mechanism is dominant for short-height crops, such as Chilli, Turmeric and Paddy. It is also interesting to note the differential backscatter response for a few common polarization states widely varies for the two frequencies between −5.72 and −1.5 dB for Paddy, Sugarcane and Maize.
Subjects