Abstract
The Synthetic Aperture Radar (SAR) is expected to use various application for monitoring ground terrain. In 1990s, some space-borne SARs had been launched and showed their validity. These space-borne SARs had been functioned with single band and single polarization of about 30m resolution. On the other hand, airborne SAR and shuttle-borne SARs have conducted the advanced technologies, such as Interferometry and Polarimetry. As interferometry by space-borne-SAR were tried using the repeat-pass data, the functions will be included to the next generation SAR in spite of their limited conditions. Multi-polarization and multi-band observations were investigated by using combination of different satellite data. More sophisticated multi-band polarimetry has been investigated by airborne and Shuttle data, and also expected to be functioned on the next satellites. In this article, the recent and future trend of SAR system is overviewed.
