{"thcode":2,"term":{"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."},"uf":[{"name":"AVHRR images","usewith":{"code":575,"name":"image collections","parent":808,"scope":"Visible representations of objects or earth properties produced by cameras, spectral instruments, or as graphical representations of measurements."}},{"name":"Advanced Very High Resolution Radiometer (AVHRR)","usewith":false}],"bt":[{"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."},{"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":[],"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":810,"name":"ocean characteristics","parent":287,"scope":"The attributes and process of seas and oceans."},{"code":1027,"name":"sea surface temperature","parent":819,"scope":"Observed temperature of surface ocean waters, typically encompassing the entire mixed layer. Some observational methods, however, may measure a much smaller depth range.  Includes temperature data obtained in-situ or by remote sensing methods."}]}