HiRISE | HiPOD Updates

HiPOD: Week of 24 November 2025

	Layers Northeast of Antoniadi Crater Also visible in Context Camera image data, the objective of this observation is to examine layers near an impact crater. The shape of this particular formation is striking in its mesa-like appearance.
	At the Margins This observation is based on coverage over existing high-resolution CRISM data that shows a sliver of residual carbon dioxide ice and its margins. This area would benefit from repeat observation to better understand surface changes and observe seasonal frost cover at a similar state as the corresponding CRISM data.
	Beyond Arakeen Quite often, HiRISE will coordinate image coverage with other science instruments to study an area of Mars in greater detail. This observation of dunes in the northern polar region of Mars called Vastitas Borealis, was coordinated with the CaSSIS instrument on the ExoMars Trace Gas Orbiter to monitor seasonal changes. The dark spots are the results of sublimating ice that exposes darker material under the top layer.
	When Did the Light-Toned Layers Form? Determining when the light-toned layered deposits formed is important for understanding the geologic history of Valles Marineris, especially because these deposits are hydrated and most likely formed in the presence of liquid water.
	Cracks in a Debris Apron The apron could be (or could have been) ice-rich, so one possibility is that the fissures are related to ice loss.