Open AccessAccuracy analysis of multi‐base InSAR altimeter in ocean surface relative elevation measurement
Author(s) -
Liu Bo,
Zhang Running,
Wan Xiaoyun,
Li Yang,
Yuan Shigeng
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0181
Subject(s) - elevation (ballistics) , altimeter , interferometric synthetic aperture radar , geodesy , remote sensing , geology , base (topology) , radar altimeter , synthetic aperture radar , mathematics , geometry , mathematical analysis
A new sea‐level elevation measurement system was introduced, which uses a distributed multi‐base forward‐scattering mechanism. After introducing the working principle of the system, this study analyses the main influencing factors of relative elevation measurement in detail. It is proved through quantitative expression that the interferometric phase error is the main error source affecting relative elevation measurement. In order to evaluate the system capability and prove that the multi‐base InSAR ( MbInSAR ) can meet the application requirements of gravity field inversion through relative ocean surface elevation measurement, three aspects of decorrelation, geometric decorrelation, volumetric decorrelation, and SNR decorrelation, are analysed as the interferometric phase error sources.