Satellites

Satellites

Of or relating to any man-made object launched to orbit Earth or another celestial body.

Contributors in Satellites

Satellites

An image transformation, usually a one-to-one operator used to lessen noise or enhance certain characteristics of the image. For any particular (x,y) coordinate on the transformed image, the spatial ...

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, antenna, or other ...

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, utilise electromagnetic radiation ...

Optical axis

Aerospace; Satellites

An imaginary line drawn directly through the optical centre of the camera lens to the geometric centre of the film. For Landsat ETM+, TM, or MSS imagery, the point in the image where geometric ...

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 images are acquired. ...

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 colour reflectance. A category is said to have a ...