We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Extended Multiple Aperture Mapdrift-Based Doppler Parameter Estimation and Compensation for Very-High-Squint Airborne SAR Imaging.
- Authors
Zhou, Zhichao; Li, Yinghe; Wang, Yan; Li, Linghao; Zeng, Tao
- Abstract
Doppler parameter estimation and compensation (DPEC) is an important technique for airborne SAR imaging due to the unpredictable disturbance of real aircraft trajectory. Traditional DPEC methods can be only applied for broadside, small- or medium-squint geometries, as they at most consider the spatial variance of the second-order Doppler phase. To implement the DPEC in very-high-squint geometries, we propose an extended multiple aperture mapdrift (EMAM) method in this paper for better accuracy. This advantage is achieved by further estimating and compensating the spatial variation of the third-order Doppler phase, i.e., the derivative of the Doppler rate. The main procedures of the EMAM, including the steps of sub-view image generation, sliding-window-based cross-correlation, and image-offset-based Doppler parameter estimation, are derived in detail, followed by the analyses for the EMAM performance. The presented approach is evaluated by both computer simulations and real airborne data.
- Subjects
DOPPLER effect; SYNTHETIC aperture radar; DOPPLER radar; REMOTE sensing by radar; FINITE element method
- Publication
Sensors (14248220), 2019, Vol 19, Issue 1, p213
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s19010213