An experimental automobile-based SAR/InSAR

Automobile-based SAR named AutoSAR is an experimental SAR system operating on ground. developed by Pohang University of Science and Technology (POSTECH). AutoSAR consists of RF, IF sub-systems, signal source (arbitrary waveform generator), a host pc, and a controller. IF sub-block, signal source and host PC are mounted inside the vehicle, and three antennas and RF sub-block are mounted on the roof of the vehicle. AutoSAR uses one transmit antenna and one receiving antenna. and uses two receiving antennas for interferometric SAR (InSAR) mode. The rotary encoder is used for the purpose of transmitting the pulses at regular along-track interval of 3 cm. The swath of AutoSAR is less than 1 Km, and azimuthal coverage is limited only by the data storage capacity. SAR and InSAR images obtained from AutoSAR, at a test site near Pohang, Korea are presented. Being on an automobile, this system can obtain SAR data of any place with a straight road nearby.