Atmosphere path delay iterative correction method based on the spatial stochastic model
SU Fanwei
WANG Yunhua
SUN Daozhong
BAI Yining
ZHANG Yanmin
Abstract：Atmospheric path delays can cause the inversion error of sea surface elevation in the cross-track interferometry.This error cannot be ignored for centimeter-level sea surface elevation measure-ments,which must be estimated accurately.The estimated image positioning deviation caused by path delay in the study will lead to the geographic location matching error of zenith delay and the estimated bias of zenith angle,which will cause the bias of path delay estimation.Therefore,an iterative correc-tion method for path delay based on a spatial stochastic model was proposed in this paper.The simula-tion results showed that this method could effectively suppress the geographic location bias on the path delay estimation and improve the inversion accuracy of the sea surface elevation.The practicality of the method was tested by interferometric data from TerraSAR-X and TanDEM-X,which would be a refer-ence for the path delay correction of the interferometric radar altimeter in the future.
Keywords：path delay correctionspatial stochastic modelinterferometric radar measurementsurface elevation inversion
Publication Date：2026-02-25
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：11( 23-33 )