Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26174
Title: Equation-based InSAR data quadtree downsampling for earthquake slip distribution inversion
Authors: Wang, C
Ding, X 
Li, Q
Jiang, M
Keywords: Earthquake inversion
Interferometric synthetic aperture radar (InSAR)
Quadtree downsampling
Slip distribution
Issue Date: 2014
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE geoscience and remote sensing letters, 2014, v. 11, no. 12, 6815638, p. 2060-2064 How to cite?
Journal: IEEE geoscience and remote sensing letters 
Abstract: Downsampling is a routine step before applying interferometric synthetic aperture radar (InSAR) data to earthquake inversion because of the high computational burden. In this letter, we make use of the matrix perturbation theory to describe the downsampling process, which is considered as matrix perturbation on inversion equation. First, we derive a formula to quantitatively assess the perturbation on the inversion solution caused by data downsampling. Next, we propose an equation-based InSAR data downsampling algorithm to better reduce the perturbation. The experiment with simulated data demonstrates that our new algorithm preserves the most details from full data inversion comparing with previous algorithms. Finally, we use our method to study the slip distribution of the 2008 Mw 6.3 Dangxiong earthquake.
URI: http://hdl.handle.net/10397/26174
ISSN: 1545-598X
DOI: 10.1109/LGRS.2014.2318775
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