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  2. Star tracker - Wikipedia

    en.wikipedia.org/wiki/Star_tracker

    A star tracker is an optical device that measures the positions of stars using photocells or a camera. [1] As the positions of many stars have been measured by astronomers to a high degree of accuracy, a star tracker on a satellite or spacecraft may be used to determine the orientation (or attitude) of the spacecraft with respect to the stars ...

  3. Barn door tracker - Wikipedia

    en.wikipedia.org/wiki/Barn_door_tracker

    A barn door tracker, also known as a Haig or Scotch mount, is a device used to cancel out the diurnal motion of the Earth for the observation or photography of astronomical objects. It is a simple alternative to attaching a camera to a motorized equatorial mount .

  4. Spacecraft attitude determination and control - Wikipedia

    en.wikipedia.org/wiki/Spacecraft_attitude...

    The STARS real-time star tracking software operates on an image from EBEX 2012, a high-altitude balloon-borne cosmology experiment launched from Antarctica on 2012-12-29. A star tracker is an optical device that measures the position(s) of star(s) using photocell(s) or a camera. [14]

  5. Defense Support Program - Wikipedia

    en.wikipedia.org/wiki/Defense_Support_Program

    The star tracker is seen pointing off to the side, above and to the right. The Defense Support Program ( DSP ) is a program of the United States Space Force that operated the reconnaissance satellites which form the principal component of the Satellite Early Warning System used by the United States.

  6. List of radars - Wikipedia

    en.wikipedia.org/wiki/List_of_radars

    AN/APS-76 search radar by Hazeltine Corporation for EC-121 Warning Star; AN/APS-80 maritime surveillance radar by Texas Instruments for P5M Marlin and P-3A/B; AN/APS-81 search radar for B-52 Stratofortress; AN/APS-82 improved AN/APS-76 search radar with moving target indication by Hazeltine Corporation for EC-121 Warning Star and E-1 Tracer.

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