This image captured by NASA's 2001 Mars Odyssey spacecraft shows a portion of the dune sheet and other dune forms on the floor of Proctor Crater. Orbit Number: 67406 Latitude: -47.2898 Longitude: 30.5462 Instrument: VIS Captured: 2017-02-23 03:04 https://photojournal.jpl.nasa.gov/catalog/PIA21657