The Mars Orbiter Camera imaged these dunes in 2000, so now we can learn what a multi-decade dune movement average is by taking a new observation to create a MOC-HiRISE temporal pair. With MOC providing a long baseline to newer HiRISE images, we can build up global averages of the effects of wind on the environment. Two decades is long enough that the dunes will have moved noticeably between MOC and HiRISE.

ID: ESP_075023_1980
date: 29 July 2022
altitude: 283 km

https://uahirise.org/hipod/ESP_075023_1980
NASA/JPL-Caltech/UArizona
#Mars #science #NASA