Work

Sensitivity Analysis of Copolar Complex Coherence for Crop Monitoring At L-Band

Year: 2025

Type: article

Abstract: Time series of polarimetric SAR images are usually employed for agricultural crop monitoring. Most methods exploit backscattering coefficients, radar vegetation indices (RVI), and outputs from target decompositions. This paper investigates the sensitivity of the co-polar complex coherence to the growth of three crop types (barley, corn, and canola) using L-band data from two airborne campaigns. The co-polar complex coherence is represented on the complex plane (unit circle) for interpretation. The experimental results from this paper reveal that the changes in the position of the co-polar complex coherence and the shape of complex coherence region are highly sensitive to specific growth stages of the examined crops. For a given crop type, changes in coherence can reflect variations in crop biophysical parameters, and inhomogeneities within the field. Furthermore, the trends in coherence variation throughout the given growth stages differ among crop types.

Source: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

DOI: 10.1109/jstars.2025.3528100

Authors: Jiayin Luo, Juan M. Lopez-Sanchez, Irena Hajnsek

Institutions: University of Alicante, Northeastern University, Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR), ETH Zurich, Institute of Environmental Engineering

Language: English

Topic: Synthetic Aperture Radar (SAR) Applications and Techniques

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $1,800