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The April 25, 2015 M7.8 Gorkha earthquake caused more than 8,000 fatalities and widespread building damage in central Nepal. Four days after the earthquake, the Italian Space Agency's (ASI's) COSMO-SkyMed Synthetic Aperture Radar (SAR) satellite acquired data over Kathmandu area. Nine days after the earthquake, the Japan Aerospace Exploration Agency's (JAXA's) ALOS-2 SAR satellite covered larger area...
The water vapor plays an important role on the microwave propagation. Plenty of methods to reduce its effects in the differential InSAR technique have been put forward, such as using MERIS, MODIS, GPS and the weather models. In order to analyze the water vapor effects quantitatively, we selected several time-series related Envisat ASAR images with their corresponding synchronous MERIS Full Resolution...
It is necessary to calibrate interferometric system parameters in order to achieve high accuracy of DEM. The traditional calibration method use a lot of ground artificial calibrators as ground control points. However, the number of calibrators is limited and the distribution is difficult in some mountainous areas. The paper presents a calibration method based on an external DEM without any artificial...
An external calibration experiment was held for an airborne SAR. The paper describes the calibration experiment that uses a series of trihedral corner reflectors to calibrate the high-resolution SAR images, including antenna pattern correction and absolute radiometric calibration. In this paper, we specifically address the determination of vertical antenna pattern with multi-flight SAR imaging geometry,...
Differential Interferometric Synthetic Aperture Radar (D-InSAR) has been widely used to study the co-seismic displacement filed of earthquakes. With the development of D-InSAR technique, the removal of the atmospheric effect has been the main focus points of research to reduce the InSAR LOS displacement measurement error. Previous studies have shown that the MERIS water vapor product is one of the...
A complete processing flow is proposed to implement burst mode to strip-map mode interferometry for ALOS PALSAR data. The processing flow is applied to an interferometric pair comprised of FBD (High Resolution mode [Dual polarization], belonging to strip-map mode) and WB1 (Wide observation mode, belonging to burst mode) mode of PALSAR. Interferometric products including differential interferometric...
On May 12th, 2008, a destructive earthquake of magnitude 8.0 struck Wenchuan. The seismic region is located at the transition zone between Qinghai-Tibet Plateau and the Sichuan Basin, which has a complex geological tectonic background. In this paper, we intend to investigate the Wenchuan earthquake using the Differential Interferometric SAR(D-InSAR) technique. Due to the large scale of the crustal...
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