期刊
GEOPHYSICAL JOURNAL INTERNATIONAL
卷 191, 期 3, 页码 1095-1108出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-246X.2012.05669.x
关键词
Time-series analysis; Numerical solutions; Inverse theory; Satellite geodesy; Radar interferometry; Africa
资金
- European Space Agency (ESA) Cat-1 project [N3224]
- joint European and Japanese Space Agencies (ESA-JAXA) ALOS-ADEN AO project [N3690]
- Canadian Space Agency (CSA) [SOAR-5020]
- ESA (Cat-1 Project) [N7244]
- Luxembourg National Research Fund (FNR)
A novel, multidimensional small baseline subset (MSBAS) methodology is presented for integration of multiple interferometric synthetic aperture radar (InSAR) data sets for computation of 2- or 3-D time-series of deformation. The proposed approach allows the combination of all possible air-borne and space-borne SAR data acquired with different acquisition parameters, temporal and spatial sampling and resolution, wave-band and polarization. The produced time-series have improved temporal resolution and can be enhanced by applying either regularization or temporal filtering to remove high-frequency noise. We apply this methodology to map 20032010 ground deformation of the Virunga Volcanic Province (VVP), North Kivu, Democratic Republic of Congo. The horizontal and vertical time-series of ground displacement clearly identify lava compaction areas, long-term deformation of Mt Nyamuragira and 2004, 2006 and 2010 pre- and coeruptive deformation. Providing that enough SAR data is available, the method opens new opportunities for detecting ground motion in the VVP and elsewhere.
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