Abstract
A novel azimuth velocity estimation method is proposed based on the multiple azimuth squint angles (MASA) imaging mode, acquiring sequential synthetic aperture radar images with different squint angles and time lags. The MASA mode acquisition geometry is given first, and the effect of target motion on azimuth offset and slant range offset is discussed in detail. Then, the azimuth velocity estimation accuracy is analyzed, considering the errors caused by registration, defocusing, and range velocity. Moreover, the interaction between target azimuth velocity and range velocity is studied for a better understanding of the azimuth velocityestimation errorcausedbythe range velocity. With the proposed error compensation step, the new method can achieve a very high accuracy in azimuth velocity estimation, as verified by experimental results based on both simulated data and the TerraSAR-X data.
| Original language | English |
|---|---|
| Article number | 7892924 |
| Pages (from-to) | 2780-2790 |
| Number of pages | 11 |
| Journal | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Volume | 10 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Apr 2017 |
Keywords
- Multiple azimuth squint angles (MASA) sequential images
- Synthetic aperture radar (SAR)
- Velocity estimation
ASJC Scopus subject areas
- Computers in Earth Sciences
- Atmospheric Science