Research on Smoothing in InSAR Ionospheric Correction
Abstract The smoothing parameters of range split spectrum (RSS) in InSAR ionospheric correction, including multilook numbers and filtering window size, are selected subjectively, so we use international reference ionosphere (IRI) as a reference to evaluate the similarity between RSS and IRI by visual comparison and statistics analysis. Considering the ionospheric distribution, we provide a relatively objective method to select smoothing parameters for RSS. 32×16 (azimuth*range) multilook and 600 pixel size filtering window for two pairs of ALOS-2 PALSAR stripmap data. The ionospheric delay is corrected well. The research shows that the IRI model can be used as a reference to select RSS smoothing parameters in both invisible deformation and slow deformation regions.
Key words :
InSAR
ionospheric correction
RSS
IRI
Cite this article:
ZHANG Kexin,TIAN Chongrui,JIAO Jian et al. Research on Smoothing in InSAR Ionospheric Correction[J]. jgg, 2022, 42(1): 29-34.
ZHANG Kexin,TIAN Chongrui,JIAO Jian et al. Research on Smoothing in InSAR Ionospheric Correction[J]. jgg, 2022, 42(1): 29-34.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2022/V42/I1/29
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