Today's VIS image shows part of Olympia Undae, the largest of several dune fields that encircle the north polar cap. This image was collected in the spring season. Orbit Number: 78164 Latitude: 80.7292 Longitude: 224.712 Instrument: VIS Captured: 2019-07-29 08:37 https://photojournal.jpl.nasa.gov/catalog/PIA23417