High resolution stereo camera

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The High Resolution Stereo Camera , or HRSC for short , is a high-resolution stereoscopic camera that is used to produce high- resolution, three-dimensional maps of the surface of the planet Mars . The image resolution is up to two meters.

The digital multispectral camera was developed together with the wide-angle optoelectronic stereo scanner for the failed Mars mission Mars 96 and is - in a further developed version - on board the space probe Mars Express .

The camera, which weighs around 20 kilograms, contains nine CCD sensor lines with a resolution of 5,184 pixels, which are arranged across the direction of flight of the probe. In the flyby , the so-called nadir channel records the planet's surface at a 90-degree angle and four additional sensor lines each detect the same point from an angle offset to parallax in and against the direction of flight. In this way, every point on the planet's surface is recorded from a total of five angles.

The depth information of each spatial point can be calculated and height information derived from the half-images obtained in this way, which are slightly laterally displaced from one another due to the parallax (stereoscopic deviation ). Four of the CCD sensors have spectral filters (red, green, blue, infrared) to obtain the color information .

The HRSC version on board Mars Express has an additional mirror telephoto lens with a focal length of about one meter, which makes it possible to take pictures with a resolution of two to three meters per pixel; The "Super Resolution Channel" (SRC) is a square CCD area sensor with a resolution of 1,048,576 pixels (one megapixel).

The camera was developed at the German Aerospace Center (DLR), Institute for Space Sensors and Planetary Exploration, under the direction of Gerhard Neukum and built by EADS Astrium GmbH in Friedrichshafen . A modified version, HRSC-A, is suitable for use for digital photogrammetry in aircraft .

Individual evidence

  1. ↑ DLR: High Resolution Stereo Camera (HRSC) ( Memento from February 2, 2007 in the Internet Archive )

Web links

Commons : Photos created with the HRSC  - a collection of images, videos and audio files