Global auroral imaging instrumentation for the Dynamics Explorer Mission

Details Global auroral imaging instrumentation for the Dynamics Explorer Mission Global auroral imaging instrumentation for the Dynamics Explorer Mission

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssi.....5..369f&link_type=abstract

Space Science Instrumentation, vol. 5, Dec. 1981, p. 369-393.

Physics

19

Auroral Spectroscopy, Dynamics Explorer 1 Satellite, Earth Observations (From Space), Collimators, Data Acquisition, Electronic Equipment, Image Processing, Paraboloid Mirrors, Spacecraft Orbits, Ultraviolet Spectrophotometers, Visual Photometry

Scientific paper

The instrumentation for obtaining global images of the auroral oval from the high-altitude spacecraft of the Dynamics Explorer Mission is described. It is noted that the three spin-scan auroral imaging photometers are expected to be able to effectively view the dim emissions from earth in the presence of strong stray light sources near their fields-of-view along the sunlit portion of the spacecraft orbit. A special optical design that includes an off-axis parabolic mirror as the focusing element and super-reflecting mirror surfaces is used to minimize the effects of stray light. The rotation of the spacecraft and an instrument scanning mirror provide the two-dimensional array of pixels making up an image frame. It is pointed out that the full width of the fields-of-view of the photometers corresponding to a single pixel is 0.29 deg and that the angular dimensions of a typical full frame are 30 deg x 30 deg and span 14,400 pixels.

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