- Industry: Aerospace
- Number of terms: 16933
- Number of blossaries: 2
- Company Profile:
The Executive Branch agency of the United States government, responsible for the nation's civilian space program and aeronautics and aerospace research.
An instrument for detecting and measuring electromagnetic radiant energy.
Industry:Aerospace
An interval in the electromagnetic spectrum defined by two wavelengths, frequencies, or wave numbers. With Landsat, bands designate the specific wavelength intervals at which images are acquired. I.e., a band is a slice of wavelengths from the electromagnetic spectrum. Landsat ETM+ has eight bands which collect radiation from different parts of the electro-magnetic spectrum. Of the eight bands, three bands are visible light, one band is panchromatic, three bands are infrared, and one band is thermal infrared.
Industry:Aerospace
An opening that admits electromagnetic radiation to a film or detector. An example would be the lens diaphragm opening in a camera.
Industry:Aerospace
Any characteristic or series of characteristics by which a material may be recognized. Used in the sense of spectral signature, as in photographic color reflectance. A category is said to have a signature only if the characteristic pattern is highly representative of all units of that category. See spectral signature.
Industry:Aerospace
Any device that gathers energy and presents it in a form suitable for obtaining information about the environment. Passive sensors, such as the ETM+, TM, and MSS, utilize electromagnetic radiation produced by the surface or object being sensed. Active sensors such as radar, supply their own energy source.
Industry:Aerospace
Any device that systematically breaks up an image into picture elements (or pixels) and records some attribute of each picture element. The sweep of a scanner's mirror, prism, antenna, or other element across the track (direction of flight) may be straight, circular, or another shape.
Industry:Aerospace
Any effect in a sensor or other apparatus or system above which the phenomenon of interest must manifest itself before it can be observed. See background noise.
Industry:Aerospace
Any marking on illustrative material for the purpose of clarification, such as numbers, letters, symbols, and signs. On digital Landsat products, the annotation (such as date of coverage, sun angle, scene identification number, and so forth) is represented in digital form in special records devoted to this purpose.
Industry:Aerospace
Any material or digital procedure used to obscure or define a part of the image.
Industry:Aerospace
