{"thcode":2,"term":{"code":948,"name":"radar imaging","parent":981,"scope":"A remote sensing technique which uses the reflection of pulsed high frequency radio waves to determine the speed, direction, and distance of faraway objects."},"uf":[],"bt":[{"code":981,"name":"remote sensing","parent":734,"scope":"Acquiring information about a natural feature or phenomenon, such as the Earth's surface, without actually being in contact with it. USGS remote sensing is usually carried out with airborne or spaceborne sensors or cameras."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1064,"name":"SLAR","parent":948,"scope":"Side-looking Airborne Radar, an airborne radar imaging technique, uses an antenna mounted on an airplane or satellite to project radiation at right angles to the flight path and collect high resolution images."},{"code":1727,"name":"doppler radar imaging","parent":948,"scope":"Exploitation of the doppler effect in radar imaging to determine speed of airborne objects such as birds, butterflies, and clouds."}],"rt":[{"code":447,"name":"geography","parent":291,"scope":"Study of the earth's landforms, topography, and climate, the distribution of flora and fauna, and the distribution, culture, and activities of human populations."},{"code":742,"name":"microwave imaging","parent":981,"scope":"Remote sensing method using short high frequency electromagnetic waves reflected or radiated from the ground."}]}