Phase gradient autofocus-a robust tool for high resolution SAR phase correction
| Autor: | Charles V. Jakowatz, Dennis C. Ghiglia, Paul H. Eichel, Daniel E. Wahl |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Synthetic aperture radar
Diffraction Autofocus Image formation Signal processing Radar tracker Computer science business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Aerospace Engineering Image processing law.invention law Radar imaging Detection theory Computer vision Artificial intelligence Electrical and Electronic Engineering business Image resolution Image restoration |
| Zdroj: | IEEE Transactions on Aerospace and Electronic Systems. 30:827-835 |
| ISSN: | 0018-9251 |
| DOI: | 10.1109/7.303752 |
| Popis: | The phase gradient autofocus (PGA) technique for phase error correction of spotlight mode synthetic aperture radar (SAR) imagery is examined carefully in the context of four fundamental signal processing steps that constitute the algorithm. We demonstrate that excellent results over a wide variety of scene content, and phase error function structure are obtained if and only if all of these steps are included in the processing. Finally, we show that the computational demands of the fun PGA algorithm do not represent a large fraction of the total image formation problem, when mid to large size images are involved. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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