Abstract
The GaoFen-3 (GF-3) satellite, launched on 10 August 2016, is the first C-band polarimetric synthetic aperture radar (PolSAR) satellite in China. The PolSAR system of GF-3 can collect a significant wealth of information for geophysical research and applications. Being used for related applications, GF-3 PolSAR images must be of good quality. It is necessary to evaluate the quality of polarimetric data and achieve the normalized quality monitoring during 8-year designed life of GF-3. In this study, a new quality assessment method of PolSAR data based on common distributed targets is proposed, and the performance of the method is analyzed by simulations and GF-3 experiments. We evaluate the quality of GF-3 PolSAR data by this method. Results suggest that GF-3 antenna is highly isolated, and the quality of calibrated data satisfies the requests of quantitative applications.
Highlights
polarimetric synthetic aperture radar (PolSAR) can obtain multidimensional data that describe polarization scattering information of targets
We propose a quality assessment method of PolSAR data based on common distributed targets
The effectiveness and anti-noise ability of the method are demonstrated by simulations and GF-3 experiments
Summary
PolSAR can obtain multidimensional data that describe polarization scattering information of targets. It has many important applications in target classification [1,2], target detection [3,4], biomass inversion [5,6] and so on. In August 2016, China launched its first PolSAR satellite—GF-3—which works at the C band and has 12 imaging modes with resolution up to 1 m [7,8]. All imaging modes of this satellite are available in either left- or right-looking orientation. The fully polarimetric mode provides data with swaths of at least 20 km and ground range resolutions of about
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