{"thcode":61,"term":{"code":456,"name":"radar","parent":449,"scope":"imaging techniques that employ radio waves to measure the reflectance of distant targets."},"uf":[{"name":"radar imaging","usewith":false}],"bt":[{"code":449,"name":"remote sensing","parent":400,"scope":"generally used for the acquisition of images or other data from aircraft or satellites; also used for ground-based systems for collecting data at a distance."},{"code":400,"name":"field observation","parent":398,"scope":"scientific investigation of physical or biological features and processes in a natural setting."},{"code":398,"name":"research method","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":459,"name":"SAR","parent":449,"scope":"technique that uses radio pulses from a moving platform (typically an aircraft or satellite) to create high-resolution images of a distant target."}]}