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HiPOD: Defrosting Dunes

This image shows a field a sand dunes in the Martian springtime while the seasonal carbon dioxide frost is sublimating into the air. This sublimation process is not at all uniform, instead creating a pattern of dark spots.

In addition, the inter-dune areas are also striking, with bright frost persisting in the troughs of polygons. Our enhanced-color cutout is centered on a brownish-colored inter-dune area.

uahirise.org/ESP_082672_1180
NASA/JPL-Caltech/UArizona

HiPOD: Gullies in the Depths of Hellas

Gullies are commonly found in the Martian mid-latitudes, particularly in the Southern Hemisphere. However, they are rare in the deepest parts of the massive Hellas impact basin.

For this image, HiRISE targeted a relatively fresh crater where previous images from the MRO Context Camera appeared to show gullies. This high-resolution look confirms their presence.

More: uahirise.org/ESP_082273_1360

NASA/JPL-Caltech/UArizona

HiPOD: Sediment Ponds in Tithonium Chasma

This survey of the canyon floor of Tithonium Chasma in Valles Marineris reveals terrain of two distinct ages. The slopes and hilltops here are made up of rough rocky outcrop that was sculpted by impact craters of all sizes. In contrast, the valley floors are filled with light toned, smooth materials with far fewer large craters.

uahirise.org/hipod/ESP_082582_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Topographic Interactions in Athabasca Valles

The request for this image was to retarget for an observation centered on the interactions between lava, topography, and a fissure.

uahirise.org/anaglyph/ESP_0822
NASA/JPL-Caltech/UArizona

HiPOD: Hydrated Sulfates in Melas Chasma

This image was acquired to get more information about a site where the CRISM instrument detected hydrated sulfates. The bright materials are likely to be sediments rich in the hydrated sulfates, and this image shows that most of the material is covered by a thin deposit of dark material, perhaps sand.

More: uahirise.org/hipod/ESP_082700_

NASA/JPL-Caltech/UArizona

HiPOD: A Channel in Huygens

The objective of this observation is to examine small, eroded channels. In this spot are many branched channels that have dark material on their floors. This image is located on what is left of the eroded southwest crater rim of Huygens, which is 467 km (290 mi) in diameter. The scene is also available in Context Camera data.

uahirise.org/hipod/ESP_075192_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Ridges West of Vernal Crater

These may be large mineralized fracture zones, so our image will help us to investigate further.

uahirise.org/anaglyph/ESP_0821
NASA/JPL-Caltech/UArizona

HiPOD: A Ridge in the Low Southern Latitudes

The objective of this observation is to determine the nature of a long straight ridge. At a point the ridge seems to disappear at the edge of an old crater and then reappear after a pause. It may be a dike. Along its length it has narrow portions and wide portions. The scene is also available in Context Camera data.

ID: ESP_075020_1690
date: 28 July 2022
altitude: 260 km

uahirise.org/hipod/ESP_075020_
NASA/JPL-Caltech/UArizona

HiPOD: The Dunes of Change

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.

uahirise.org/hipod/ESP_075023_
NASA/JPL-Caltech/UArizona

HiPOD: Fluvial Erosion in Harmakhis Vallis

This observation was requested by a Mars class to examine fluvial processes in one of the large channels leading into Harmakhis Vallis. The requested image is in a corner pointing opposite of the flow, possibly creating an eddy/turbulent area. The goal is to get a high resolution look for shoreline markings and erosion effects. Harmakhis Vallis probably formed by a combination of surface collapse and flowing water.

uahirise.org/hipod/ESP_075006_

HiRISE 3D: Channels in Hebrus Valles

The objective of this observation is to examine channels and streamlined features. The main channels seem to go into a short trough. 

uahirise.org/anaglyph/ESP_0820
NASA/JPL-Caltech/UArizona

HiPOD: A Candidate Recent Impact Site

Why do we initially say “candidate”? Before HiRISE acquires an image, the Context Camera on MRO might observe something that could be an impact, but their resolution is not like ours. In one of their images, there was a large diffuse dark blast zone that was not present in an earlier observation, so that team asked HiRISE to acquire a picture to confirm if this is an impact crater.

uahirise.org/hipod/ESP_074999_
NASA/JPL-Caltech/UArizona

HiPOD: Layering in Arabia Terra

The objective of this observation is to search for layering in Arabia. In Context Camera data, the layering shows up in buttes, ridges, and the edges of mesas. Our image may be able to see many more of these layers. This image will also help us to determine the horizonatal extent of layering in the region.

ID: ESP_074982_2100
date: 25 July 2022
altitude: 290 km

uahirise.org/hipod/ESP_074982_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Ridges in Huygens Crater

We acquired this image to investigate the timing relationship between the wrinkle ridges and the quasi-circular mesas.

uahirise.org/anaglyph/ESP_0742
NASA/JPL-Caltech/UArizona

HiPOD: Channel, Fan, Crater

The objective of this observation is to examine a channel on a crater wall, where a fan has formed at the base. Images like this, also found in Context Camera data, may help us better understand how craters are degraded. This particular crater is one of many located to the northwest of the massive Hellas impact basin.

ID: ESP_074982_1570
date: 25 July 2022
altitude: 257 km

uahirise.org/hipod/ESP_074982_
NASA/JPL-Caltech/UArizona

HiRISE 3D: A Partly Filled Impact Crater near Nicholson Crater

This anaglyph shows an infilled and possibly exhumed crater. HiRISE resolution can examine the shape of the crater fill and any wall layering.

uahirise.org/anaglyph/ESP_0822
NASA/JPL-Caltech/UArizona

HiPOD: A Circular Landform within an Impact Crater

This circular formation appears to have the land around it sloping to its edge. The formation then looks to rise out of the ground with various others different formations around it. There also what appears to be a small crater on the top. When viewing this area using infrared background, the land formation has several markings on one side more than the other.

uahirise.org/hipod/ESP_074972_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Light-Toned Outcrops in Aurorae Chaos

This image was requested to fill in HiRISE coverage where there is an existing CRISM instrument data.

uahirise.org/anaglyph/ESP_0742
NASA/JPL-Caltech/UArizona

HiPOD: A Patchy Outcrop of Light-Toned Materials

This observation targets a small region of patchy light-toned materials visible in Context Camera images. These outcrops are small, precluding geomorphological analysis and assignment of a stratigraphic position relative to the surrounding materials. The shape of this material closely resembles sinuous, light-toned outcrops elsewhere in Terra Cimmeria.

uahirise.org/hipod/ESP_074952_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Floor of East Candor Chasma

This 3D image shows intricate folding and deformational structures within the layered deposits in east Candor Chasma.

uahirise.org/anaglyph/ESP_0822
NASA/JPL-Caltech/UArizona

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HiRISE (NASA)

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