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Calibration of High-Resolution Synthetic Aperture Radar (SAR) Image Features by Ground-Based Experiments
- Source :
- IETE Journal of Research. 63:381-391
- Publication Year :
- 2017
- Publisher :
- Informa UK Limited, 2017.
-
Abstract
- Results of recent experiments reported in the literature with frequency-modulated continuous wave (FMCW) mode of synthetic aperture radar (SAR) imaging are enabling high-resolution, day and night remote sensing of ground terrain. Also, FMCW-based SAR techniques are accepted for ground-based SAR (GB-SAR) instrumentation for early warning of fragile slopes such as in coal mines, avalanche detection. Features of images generated by FMCW SAR sensors need to be calibrated for interpretation purposes as like other forms of microwave imaging. In this paper, we demonstrate a ground-based method to calibrate high-resolution FMCW SAR image features by experimenting with a long railSAR testbed. Signal processing algorithms are derived to support high-resolution SAR image formation according to the requirement of the experiment. Trihedral corner reflectors (CRs) of submeter dimensions are placed on terrains with different normalized radar cross-section (RCS) coefficient (σ0) to measure backscattering properti...
- Subjects :
- Synthetic aperture radar
Image formation
Instrumentation
0211 other engineering and technologies
020206 networking & telecommunications
Terrain
02 engineering and technology
Computer Science Applications
Theoretical Computer Science
law.invention
Speckle pattern
Microwave imaging
law
0202 electrical engineering, electronic engineering, information engineering
Calibration
Electrical and Electronic Engineering
Radar
Geology
021101 geological & geomatics engineering
Remote sensing
Subjects
Details
- ISSN :
- 0974780X and 03772063
- Volume :
- 63
- Database :
- OpenAIRE
- Journal :
- IETE Journal of Research
- Accession number :
- edsair.doi...........dd7786bf35d37c6383e79d3ee4a56adf