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push broom scanner
A push broom scanner (along track scanner) is a technology for obtaining images with spectroscopic sensors. It is regularly used for passive remote sensing from space and in spectral analysis on production lines, for example with near-infrared spectroscopy.
In a push broom sensor, a line of sensors arranged perpendicular to the flight direction of the spacecraft is used. Different areas of the surface are imaged as the spacecraft flies forward. A push broom scanner can gather more light than a whisk broom scanner because it looks at a particular area for a longer time, like a long exposure on a camera. One drawback of pushbroom sensors is the varying sensitivity of the individual detectors. These sensors are also known as ''survey'' or ''wide field'' devices, comparable to wide angle lenses on conventional cameras.
Example spacecraft cameras using push broom imagers: Mars Express's High Resolution Stereo Camera, Lunar Reconnaissance Orbiter Camera NAC, Mars Global Surveyor's Mars Orbiter Camera WAC,〔 and the Multi-angle Imaging SpectroRadiometer.〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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