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- W2594051318 abstract "The European Space Agency's Sentinel-1 mission, a constellation of two C-band synthetic aperture radar (SAR) satellites, utilizes terrain observation by progressive scan (TOPS) antenna beam steering as its default operation mode to achieve wide-swath coverage and short revisit time. The beam steering during the TOPS acquisition provides a means to measure azimuth motion by using the phase difference between forward and backward looking interferograms within regions of overlap. Hence, there are two spectral diversity techniques for along-track displacement measurement, including multi-aperture interferometry (MAI) and burst overlap This paper analyses the measurement accuracies of MAI and overlap interferometry. Due to large spectral separation in the overlap region, overlap interferometry is a more sensitive measurement. We present a TOPS interferometry approach for along-track displacement measurement. The phase bias caused by azimuth miscoregistration is first estimated by overlap interferometry over stationary regions. After correcting the coregistration error, the MAI phase and the interferometric phase difference between overlaps are recalculated to obtain along-track displacements. We test the approach with Sentinel-1 TOPS interferometric data over the 2015 Mw 7.8 Nepal earthquake fault. The results prove the feasibility of our approach and show the potential of joint estimation of along-track displacement with overlap interferometry and MAI." @default.
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- W2594051318 date "2017-02-01" @default.
- W2594051318 modified "2023-10-01" @default.
- W2594051318 title "Sentinel-1 TOPS interferometry for along-track displacement measurement" @default.
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- W2594051318 doi "https://doi.org/10.1088/1755-1315/57/1/012019" @default.
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