Real-time Unwrapped Phase Generating Algorithm based on Airborne Dual-antenna InSAR System
نویسندگان
چکیده
In order to satisfy the requirement of terrain mapping in real-time, this paper solves the problem of too large computation in the traditional interferometric processing algorithm, and provides the algorithm to generate real-time unwrapped phase with high quality based on airborne dual-antenna InSAR system. It utilizes non-linear ECS autoregistration imaging algorithm to generate high accuracy auto-registration dual-channel SAR images, which omits the latter time-consuming registration course. During the course of imaging, accurate interferometric motion compensation is introduced. Fast filter is performed on the two SAR images to generate high quality interferometric fringe, and then fast phase unwrapping algorithm based on partitioning the dense residues area is done to get the unwrapped phase. Finally, the processed result of the real InSAR data proves the validation of the algorithm.
منابع مشابه
Baseline Estimation Algorithm with Block Adjustment for Multi- Pass Dual-antenna Insar
Baseline parameters and interferometric phase offset need to be estimated accurately, for they are key parameters in processing of InSAR (Interferometric Synthetic Aperture Radar). If adopting baseline estimation algorithm with single pass, it needs large quantities of ground control points to estimate interferometric parameters for mosaicking multiple passes dual-antenna airborne InSAR data th...
متن کاملA Statistical-cost Approach to Unwrapping the Phase of Insar Time Series
Fully 3-D phase-unwrapping algorithms are commonly based on the central assumption that the phase difference between neighbouring sample points in any dimension is generally less than half a phase cycle (the Nyquist criteria). In the case of InSAR time series, however, signals are correlated spatially but uncorrelated over the repeatpass time, due chiefly to changes in atmospheric delay. Here I...
متن کاملInSAR Phase Unwrapping by Transforming Sparce Data into a Regular Space
Phase unwrapping is one of the most important parts of InSAR techniques. In order to estimate the grand surface displacements, interferomtric phases modulated between 0 to 2π must be unwrapped. Based on the use of either the conventional method or persistent scatterer (PS), phases will be spread both regularly and irregularly. The phases of PSs can be unwrapped by reducing phases into a regular...
متن کاملA New Calibration Method of Airborne Interferometric SAR
The accuracy of system parameters is one of the key factors that limit the precision of DEM from airborne dual-antenna InSAR, so the interferometric calibration is of great significance. The traditional calibration method establishes the sensitivity equations to solve the different calibration parameters biases. This paper presents a new calibration method to improve the algorithm stability and...
متن کاملPhase-Offset Calculation for InSAR DEM Generation Without Using Ground Control Points
Synthetic Aperture Radar (SAR) is a microwave remote sensing sensor, which can be mounted either on spaceborne or airborne systems and allows night and day and all-weather imaging. Use of interferometric SAR systems (which consist of two SAR antennas pointing to the same area from slightly different view angles) allows the generation of Digital Elevation Models (DEMs) by means of the so-called ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- JSW
دوره 8 شماره
صفحات -
تاریخ انتشار 2013