Aerospace

Aerospace

Industry that includes methods of travel and spacecraft for navigating the air or space.

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Aerospace > Satellites

spectral band

Aerospace; Satellites

An interval in the electromagnetic spectrum defined by two wavelengths, frequencies, or wave numbers. With Landsat, bands designate the specific wavelength intervals at which ...

aperture

Aerospace; Satellites

An opening that admits electromagnetic radiation to a film or detector. An example would be the lens diaphragm opening in a camera.

signature

Aerospace; Satellites

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 ...

sensor

Aerospace; Satellites

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 ...

scanner

Aerospace; Satellites

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, ...

background

Aerospace; Satellites

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.