Title :
Preserving exponentials in synthetic aperture radar data
Author :
Pepin, Matthew P. ; Sacchini, Joseph J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Air Force Inst. of Technol., Wright-Patterson AFB, OH, USA
Abstract :
Examines the conditions necessary to preserve damped exponentials in synthetic aperture radar (SAR) phase histories. A small number of 2D damped exponentials can model SAR data when the radar return is due to a few point scatterers. Error in parametric estimation of the exponential parameters results from the method of data collection, spotlight SAR or radar chamber measurement. This error is quantified and compared to the estimation bound (Cramer-Rao). Methods to reduce this error and preserve true point scatterer locations are successfully applied. Also, a fast method of focusing SAR data to the point scatterer locations is developed
Keywords :
geophysical signal processing; geophysical techniques; radar imaging; radar signal processing; remote sensing by radar; synthetic aperture radar; 2D damped exponentials; SAR imagery; damped exponentials; exponential preservation; geophysical measurement technique; land surface; parametric estimation; phase histories; point scatterers; preserving exponentials; radar chamber measurement; radar imaging; radar remote sensing; spotlight SAR; synthetic aperture radar; terrain mapping; true point scatterer locations; Degradation; Estimation error; Frequency domain analysis; Frequency estimation; Geometry; History; Integrated circuit synthesis; Interpolation; Radar scattering; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International
Conference_Location :
Lincoln, NE
Print_ISBN :
0-7803-3068-4
DOI :
10.1109/IGARSS.1996.516242
