Depth-diameter relation for large Martian craters determined from Mariner 9 UVS altimetry

Astronomy and Astrophysics – Astronomy

Scientific paper

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Altimeters, Depth Measurement, Mariner 9 Space Probe, Mars Surface, Ultraviolet Spectrometers, Astronomical Photometry, Mercury (Planet), Satellite-Borne Instruments

Scientific paper

The depth/diameter ratio for 87 craters on Mars is determined using Mariner 9 ultraviolet-spectrometer (UVS) altimetry. The sample includes craters 12 to 100 km in diameter and 0.4 to 3.3 km in depth. The largest depth/diameter ratios on Mars are comparable to those of fresh craters on Mercury. However, more than half of the present sample consists of degraded craters whose depths are significantly shallower than those of fresh craters of similar diameter on Mercury, confirming the interpretations of earlier photoanalysts.

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