{"thcode":2,"term":{"code":588,"name":"infrared imaging","parent":981,"scope":"Method of remote sensing in which optical sensors produce visible representations of infrared rays or radiated heat from the observed objects and the temperature variations are represented by different colors in the image."},"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":74,"name":"AVHRR","parent":588,"scope":"Advanced Very High Resolution Radiometer or broad-band, four or five channel scanner, sensing in the visible, near-infrared, and thermal infrared portions of the electromagnetic spectrum. This information is used to estimate characteristics of the land and sea surface such as temperature and overall health of vegetation."},{"code":1379,"name":"AVIRIS","parent":588,"scope":null}],"rt":[{"code":2290,"name":"electromagnetic reflectance and emissivity","parent":1367,"scope":"Effectiveness of an earth material in reflecting or emitting radiation, varying by wavelength.  Measurements are made over the infrared part of the electromagnetic spectrum in a laboratory to compare with remotely-sensed data obtained by airborne or satellite imaging systems."},{"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."}]}