Title
Rapid Surface Large-Change Monitoring by Repeat-Pass GEO SAR Multibaseline Interferometry
Author
Li, Y. (TU Delft Mathematical Geodesy and Positioning; Beijing Institute of Technology)
Hu, Cheng (Beijing Institute of Technology)
Ao, Dongyang (Beijing Institute of Technology)
Date
2022
Abstract
Fast observations of rapid surface large-changes are demanded in disaster evaluations and scientific studies. Digital elevation model (DEM) differencing before and after the events is an effective way to retrieve the changes. Owing to a short repeat cycle, geosynchronous synthetic aperture radar (GEO SAR) systems can quickly obtain repeat-pass data and generate postevent DEMs by interferometry. However, interferometric baselines under its quick revisit cases are short, resulting in generating low-accuracy postevent DEMs. Moreover, surface large-changes can bring height ambiguity problems under the single-baseline interferometric processing. In this letter, we address the problem through a multibaseline (MB) processing. Since GEO SAR MB data can derive from the repeat-pass interferometric data of different subapertures and revisits, a subaperture-decomposition-based temporal and spatial MB method is proposed. The simulation results verify the effectiveness of the proposed method, where the quickly generated postevent DEM can help to realize the rapid large-elevation change observations.
Subject
Change detection
Digital elevation model (DEM)
Geosynchronous synthetic aperture radar (GEO SAR)
Interferometric SAR
To reference this document use:
http://resolver.tudelft.nl/uuid:9dadc031-71c3-4a67-87d8-a967be261160
DOI
https://doi.org/10.1109/LGRS.2020.3026326
Embargo date
2023-07-01
ISSN
1545-598X
Source
IEEE Geoscience and Remote Sensing Letters, 19
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2022 Y. Li, Cheng Hu, Dongyang Ao