Satellites

Satellites

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

Industry: Aerospace

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Satellites

Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI)

Aerospace; Satellites

Also called Explorer 81, it is the sixth mission in the line of NASA Small Explorer missions (also known as SMEX). Launched on 5 February 2002, its primary mission is to explore the basic physics of ...

Internal calibrator (IC)

Aerospace; Satellites

A specific type of lamp-based calibration system carried on-board an imager in space for the purpose of monitoring for possible radiometric changes in detector responsivity with time. The internal ...

Linear spatial philtre

Aerospace; Satellites

A spatial philtre for which the grey shade assignment at coordinates (x, y) in the transformed image is made by some weighted average (linear combination) of grey shades located to a particular ...

Vidicon

Aerospace; Satellites

A storage-type, electronically scanned, photoconductive, television camera tube, which, often has a response to radiation beyond the limits of the visible region. Particularly useful in space ...

X band

Aerospace; Satellites

A radio frequency band extending from approximately 8.0 to 12.5 gigahertz. It is part of the microwave portion of the electromagnetic spectrum and is used for some communications satellites and by ...

Line scanner

Aerospace; Satellites

A scanning radiometer which by use of a rotating or oscillating plane mirror can scan a path normal to the movement of the radiometer. The mirror directs incoming radiation to a detector, which ...

Polar orbit

Aerospace; Satellites

A satellite orbit that passes over, or very close to, both poles of the Earth. Landsat 4, 5, and 7 all had/have a near-polar orbit at 438 miles (705 kilometers) above the Earth.