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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...
In this work we analysis the relationship between the industrial structure and regional subsidence base on the research in past. We mapped the spatial and temporal patterns of the land subsidence near the city of Hangzhou, China by PSI analysis with more than 49 scenes of ERS-1/2 SAR images acquired from 1992 to 2006.[1] According to the PSI results, 13 subsidence centers (express by red dashed circle...
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 Gabor wavelet based palmprint recognition algorithm is introduced in this paper. With high recognition rate and low computational complexity, the algorithm is suitable for portable platform. TI TMS320VC5509A is a high performance digital signal processor (DSP) provided by Texas Instruments Corporation. By using the 5509A chip as the core processor, working with AVR microcontroller, CPLD device and...
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...
The performance of Multi-resolution Morphology Gradient (MMG)-based fault location scheme in power transmission lines will deteriorate when the noise is imposed on the transient signals. In this paper, a novel mathematical morphology filter Dierion is proposed to effectively reduce the noise in the transient signals and improve the performance of the accurate fault location using MMG. This proposed...
ScanSAR is a synthetic aperture radar (SAR), which has a very wide image swath. This provides a new option for interferometric applications. It makes the large scale deformation observation easier to implement. In this paper, we applied ScanSAR differential interferometry in Dangxiong, Tibet to observe the crust deformation there. However, the accuracy of ScanSAR interferometry is also affected by...
Geophysical model function (GMF) is the basis and prerequisite for the ocean surface wind vector retrieval with scatterometers. Among many operational models, the Qscat-1 model was specifically developed for SeaWinds scatterometer and is being applied to its operational wind retrieval. This paper is to validate the accuracy of the Qscat-1 model by using some SeaWinds Level 2 data and corresponding...
Geophysical model function is the basis for the wind vector retrieval with scatterometer and a number of models have been developed to operationally retrieve the ocean surface wind in the past three decades. However, none of the operational models ever took the water surface temperature into account in its modeling, which is considered to have some effect on the ocean backscattering, and in turn on...
The water vapour in troposphere has been identified as one of the major errors in SAR interferograms, which can cause a spatial delay during two non-simultaneous acquisitions. The microwave-signal propagation path delay due to water vapour may reduce the reliability of deformation measurements. In this paper, it aims to assess the water vapour effect on interferograms, and apply synchronous MERIS...
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