Push broom scanner

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A push broom scanner (along track scanner) is a technology for obtaining satellite images with optical cameras. It is used for passive remote sensing from space. 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,[1] Lunar Reconnaissance Orbiter Camera NAC,[2][3] Mars Global Surveyor's Mars Orbiter Camera WAC,[1] and the Multi-angle Imaging SpectroRadiometer.[1]

References

  1. ↑ 1.0 1.1 1.2 Hoekzema, Nick. "Planetary & Cometary Exploration Cameras on Orbiters and Landers". Archived from the original on 2014-02-02. Retrieved 2 February 2014. 
  2. ↑ Neal-Jones, Nancy (2014-01-29). "NASA's LRO Snaps a Picture of NASA's LADEE Spacecraft". NASA. Retrieved 2 February 2014. 
  3. ↑ K. N. Burns; E. J. Speyerer; M. S. Robinson; T. Tran; M. R. Rosiek; B. A. Archinal; E. Howington-Kraus; LROC Science Team (25 August 2012). "Digital Elevation Models and Derived Products from LROC NAC STEREO observations". International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B4, 2012 XXII ISPRS Congress. p. 483. Retrieved 2 February 2014. 

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