Title :
Spotlight processing of wide-beam stripmap SAR data using the frequency scaling algorithm
Author :
Mittermayer, Josef ; Moreira, Alberto ; Loffeld, Otmar
Author_Institution :
Inst. fur Hochfrequenztech., Deutsches Zentrum fur Luft- & Raumfahrt, Oberpfaffenhofen, Germany
Abstract :
This paper presents a new processing algorithm for spotlight SAR data processing. The frequency scaling algorithm (FS) allows the processing of dechirped raw data. Due to the use of frequency scaling and SPECAN combined with azimuth scaling, the whole processing is performed without interpolations. A very useful formulation for dechirped SAR signals in the range Doppler domain is presented. The analytical modelling is presented in this paper. A more demonstrative explanation of the algorithm, including sub-aperture approach, frequency and azimuth scaling, can be found in J. Mittermeyer et al. (1997). A spotlight image is presented which has been processed from stripmap raw data of the E-SAR system of DLR by using the FS algorithm
Keywords :
geophysical signal processing; geophysical techniques; radar imaging; radar signal processing; remote sensing by radar; synthetic aperture radar; SAR; SPECAN; analytical model; azimuth scaling; dechirped SAR signal; dechirped raw data; frequency scaling algorithm; geophysical measurement technique; image processing; land surface; radar imaging; radar remote sensing; range Doppler domain; spotlight SAR; spotlight image; spotlight processing; stripmap; sub-aperture approach; synthetic aperture radar; terrain mapping; wide-beam stripmap; Analytical models; Apertures; Azimuth; Bandwidth; Chirp modulation; Data processing; Frequency; Interpolation; Layout; Signal resolution;
Conference_Titel :
Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4403-0
DOI :
10.1109/IGARSS.1998.699710
