English: The Russell Crater dune field is covered seasonally by carbon dioxidefrost, and this image shows the dune field after the frost has sublimated (evaporated directly from solid to gas). There are just a few patches left of the bright seasonal frost.
Numerous dark dust devil tracks can be seen meandering across the dunes. The face of the largest dune is lined with gullies. The source of the gullies is unclear but could involve erosion by the seasonal carbon dioxide ice.
Local Mars time: 3:20 PM. Latitude (centered): -54.3 °. Longitude (East): 12.9 °. Range to target site: 253.0 km. Original image scale range: 25.3 cm/pixel (with 1 x 1 binning) so objects ~76 cm across are resolved. Map projected scale: 25 cm/pixel and north is up. Map projection: EQUIRECTANGULAR. Emission angle: 6.1 °. Phase angle: 53.4 °. Solar incidence angle: 48 °, with the Sun about 42 ° above the horizon. Solar longitude: 252.7 °, Northern Autumn. For non-map projected products: North azimuth: 96 °. Sub-solar azimuth: 23.7 °.
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]
{{Information |Description={{en|1=The Russell Crater dune field is covered seasonally by carbon dioxidefrost, and this image shows the dune field after the frost has sublimated (evaporated directly from solid to gas). There are just a few pat
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