Imaging from Spaceborne and Airborne SARs, Calibration, and Applications
Sixty years after its birth, Synthetic Aperture Radar (SAR) evolved as a key player of earth observation, and it is continually upgraded by enhanced hardware functionality and improved overall performance in response to user requirements. The basic information gained by SAR includes the backscattering coefficient of targets, their phases (the truncated distance between SAR and its targets), and their polarization dependence. The spatiotemporal combination of the multiple data operated on the satellite or aircraft significantly increases its sensitivity to detect changes on earth, including temporal variations of the planet in amplitude and the interferometric change for monitoring disasters; deformations caused by earthquakes, volcanic activity, and landslides; environmental changes; ship detection; and so on. Earth-orbiting satellites with the appropriate sensors can detect environmental changes because of their large spatial coverage and availability.
Imaging from Spaceborne and Airborne SARs, Calibration, and Applications provides A-to-Z information regarding SAR researches through 15 chapters that focus on the JAXA L-band SAR, including hardware description, principles of SAR imaging, theoretical description of SAR imaging and error, ScanSAR imaging, polarimetric calibration, inflight antenna pattern, SAR geometry and ortho rectification, SAR calibration, defocusing for moving targets, large-scale SAR imaging and mosaic, interferometric SAR processing, irregularities, application, and forest estimation. Sample data are created by using L-band SAR, JERS-1, PALSAR, PALSAR-2, and Pi-SAR-L2.
This book is based on the author’s experience as a principal researcher at JAXA with responsibilities for L-band SAR operation and researches. It reveals the inside of SAR processing and application researches performed at JAXA, which makes this book a valuable reference for a wide range of SAR researchers, professionals, and students.
1. Introduction 2. Introduction of the SAR System 3. SAR Imaging and Analysis 4. Radar Equation for SAR Correlation Power—Radiometry 5. ScanSAR Imaging 6. Polarimetric Calibration 7. SAR Elevation Antenna Pattern—Theory and Measured Pattern from the Natural Target Data 8. Geometry/Ortho-Rectification and Slope-Corrections 9. Calibration—Radiometry and Geometry 10. Defocusing and Image Shift due to the Moving Target 11. Mosaicking and Multi-Temporal SAR Imaging 12. SAR Interferometry 13. Irregularities (RFI and Ionosphere) 14. Applications 15. Forest Map Generation
"This book is written by a worldwide authority, Dr. Shimada Masanobu, who had been developing spaceborne and airborne SAR systems at Japan Aerospace Exploration Agency (JAXA) as a senior researcher for many years. The description is based on his experiences in the system design and operations."
~Yoshio Yamaguchi, Niigata University
"This book is based on the over 30 years research and development of SAR systems by the author at JPL, JAXA and Tokyo Denki University. The book is unique in that it covers SAR hardware, platform attitude instability and correction, SAR processors for different imaging modes such as the StripMap, Spotlight, ScanSAR, Interferometric and polarimetric SARs, precise radiometric and geometric calibration techniques for these modes, antenna pattern measurements, etc., with particular reference to the Japanese spaceborne and airborne L-band SARs. The book also provides applications in the fields of disaster mitigation, forestry, target detection, ionosphere, and other earth science with many examples. It is a good textbook for the beginners, and a reference book for experienced engineers and scientists working in the SAR systems from the start to end."
~Kazuo Ouchi, IHI Corporation, Japan