Interferometric estimation of three-dimensional ice-flow using ascending and descending passes

作     者：Joughin, IR Kwok, R Fahnestock, MA 

作者机构：CALTECH Jet Prop Lab Pasadena CA 91109 USA Univ Maryland Dept Meteorol Joint Ctr Earth Syst Sci College Pk MD 20742 USA 

出 版 物：《IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING》 (IEEE Trans Geosci Remote Sens)

年 卷 期：1998年第36卷第1期

页      面：25-37页

核心收录：

学科分类：0808[工学-电气工程] 1002[医学-临床医学] 08[工学] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 

基　　金：National Aeronautics and Space Administration  NASA  (NAGW4285) 

主　　题：interferometry remote sensing synthetic aperture radar (SAR) 

摘      要：Satellite radar interferometry (SRI) provides an important new tool for determining ice-flow velocity, Interferometric measurements made from a single-track direction are sensitive only to a single component of the three-component velocity vector, Observations from along three different track directions would allow the full velocity vector to be determined, A north/south-looking synthetic aperture radar (SAR) could provide these observations over large portions of the globe, but not over large areas of the polar ice sheets, We develop and demonstrate a technique that allows the three-component velocity vector to be estimated from data acquired along two track directions (ascending and descending) under a surface-parallel how assumption, This technique requires that we have accurate estimates of the surface slope, which we also determined interferometrically, To demonstrate the technique, we estimate the three-component velocity field for the Ryder Glacier, Greenland, Our results are promising, although we do not have yet ground-truth data with which to determine the accuracy of our estimates.