Title :
Using TOPSAR for District Observation
Author :
Chen, Qi ; Huang, Haifeng ; He, Feng ; Dong, Zhen ; Liang, Diannong
Author_Institution :
Inst. of Space Electron. & Inf. Technol., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
Terrain observation by progressive scans (TOPSAR) solves the scalloping effect of ScanSAR by steering the radar beam in the azimuth direction. The steering enables TOPSAR to achieve more qualified images than ScanSAR with the same coverage and resolution. Nevertheless, when TOPSAR is used for district observation, the steering enables it to get higher resolution and/or wider coverage. This letter compares the resolution limits of TOPSAR and ScanSAR and then proposes four possible modes of using TOPSAR for district observation. For each mode, the steering angle is discussed, and a design result is provided.
Keywords :
beam steering; geophysical techniques; image resolution; radar imaging; synthetic aperture radar; ScanSAR imaging; TOPSAR; azimuth direction; district observation; image resolution; radar beam steering angle; scalloping effect; terrain observation by progressive scan; Azimuth; Geometry; Image resolution; Signal to noise ratio; Standards; Synthetic aperture radar; District observation; system parameter design; terrain observation by progressive scans (TOPSAR);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2012.2207086
