Scalloping Correction in TOPS Imaging Mode SAR Data

Author

Wollstadt, Steffen ; Prats, Pau ; Bachmann, Markus ; Mittermayer, Josef ; Scheiber, Rolf

Author_Institution

Microwave & Radar Inst., German Aerosp. Center (DLR), Oberpfaffenhofen, Germany

Volume

9

Issue

4

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

614

Lastpage

618

Abstract

This letter presents an investigation on scalloping correction in the Terrain Observation by Progressive Scan (TOPS) imaging mode for synthetic aperture radar systems with electronically steered phased array antennas. A theoretical simulation of the scalloping is performed, and two correction methods are introduced. The simulation is based on a general cardinal sine (sinc) antenna model as well as on the TerraSAR-X (TSX) antenna model. Real TSX data acquired over rainforest are used for demonstration and verification of the scalloping simulation and correction. Furthermore, a calibration approach, taking into account the special TOPS imaging mode properties, is introduced.

Keywords

antenna phased arrays; beam steering; calibration; geophysical image processing; phased array radar; radar antennas; radar imaging; synthetic aperture radar; terrain mapping; TOPS imaging mode; TSX; TerraSAR-X antenna model; calibration; electronic beam steering; general cardinal sine antenna model; phased array antenna; scalloping correction; scalloping simulation; synthetic aperture radar; terrain observation by progressive scan; Antennas; Arrays; Azimuth; Beam steering; Calibration; Imaging; Quantization; Electronic beam steering; TOPS calibration; TerraSAR-X (TSX); Terrain Observation by Progressive Scan (TOPS); phased array antenna; scalloping;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2011.2176716

Filename

6112179