Dissertation > Excellent graduate degree dissertation topics show

Research on Data Simulation and Phase Unwrapping for Multi-Baseline InSAR

Author: ZhangHongMin
Tutor: XuQing
School: PLA Information Engineering University
Course: Photogrammetry and Remote Sensing
Keywords: Synthetic aperture radar interferometry Multi-baseline Interferogram Simulation Phase Unwrapping Chinese Remainder Theorem Differential filtering
CLC: TN958
Type: Master's thesis
Year: 2010
Downloads: 185
Quote: 1
Read: Download Dissertation

Abstract

Since the 1990s, in order to solve the problem of the traditional single-baseline InSAR technology in steep terrain interferometric phase due to sampling processing, multi-baseline InSAR technology came into being, become an important development direction of InSAR technology. In view of our multi-baseline InSAR technology is still in its infancy, this multi-baseline InSAR technology research, design multi-baseline InSAR data simulation program, the use of multiple sets of DEM simulation experiment and simulation-based interferometric data, a multi-baseline InSAR phase unwrapping research and experimentation. The main research content and innovations include: (1) describes the the InSAR technology development and application, analyzes the existing problems of the traditional single-baseline InSAR technology, analysis of multi-baseline InSAR technology research background, status and key techniques to clarify the research purpose and meaning; (2) Analysis of the concept of the SAR image resolution and pixel size, the coordinate system used in the SAR processing, SAR image features and several commonly used SAR structure like model; elaborated InSAR for DEM on the basic principle of the technical analysis of the characteristics and treatment processes for high-precision multi-baseline InSAR DEM; summarizes the typical multi-baseline InSAR configuration mode; study multi-baseline InSAR data simulation technology, based on F.Leberl conformation model designed multi-baseline InSAR interferogram direct method simulation programs and the indirect method simulation program; multi-baseline InSAR interferogram simulation using multiple sets of DEM and contrast, analysis of the simulation results and simulation efficiency of the different programs; complete SAR simulation of the intensity image. The simulation experiments for multi-baseline InSAR phase solution wrapped around the study provides sufficient experimental data; introduction of the Chinese remainder theorem to multi-baseline InSAR phase unwrapping, the wrapped method based on the Chinese remainder theorem of multi-baseline InSAR phase solution for the first time design, break through the restrictions on vertical baseline particular proportion, based on non-coprime mode to analog converter coprime Chinese Remainder Theorem multi-baseline InSAR phase unwrapping method. Using this method to take advantage of the proportional relationship between the vertical baseline, extended winding phase fuzzy interval to address the under-sampling and aliasing interferometric phase unwrapping problem; 5. Drawing vector of zero-IF filter thinking design based on the differential filter multi-baseline InSAR phase unwrapping method. Firstly, the shortest baseline interferogram filtering and phase unwrapping, and then based on the proportional relationship between the vertical baseline and shorter baseline interferogram phase unwrapping results to build a long baseline interferometry Figure reference interferogram, followed by a longer baseline interferogram differential filtering and phase unwrapping, until the longest baseline interferometry Once the graphic is wrapped around. This method can take full advantage of shorter baseline interferometry unwrapping results guiding longer baseline interferogram phase unwrapping, thus solving a long baseline interferometry due to sampling area phase unwrapping problem; This method can overcome the the noise impact, robustness; 6 This paper proposed new design of two multi-baseline InSAR phase unwrapping method simulation interferogram phase unwrapping experiments, combined with experimental results, comparison, analysis of the two-phase unwrapping methods applicable and characteristics. On the basis of in-depth study of the multi-baseline InSAR data simulation and phase unwrapping, the authors developed a set of multi-baseline InSAR data simulation and the phase unwrapping experimental software system. The thesis is of positive significance for the promotion of the development of our multi-baseline InSAR technology.

Related Dissertations

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar: institutional sub-
© 2012 www.DissertationTopic.Net Mobile