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Reflectance study of ice and Mars soil simulant associations-II. CO2 and H2O ice
Thomas, Nicolas; Pommerol, Antoine; Poch, Olivier +1 more
We measure the visible and near-infrared reflectance of icy analogues of the Martian surface made of CO2 ice associated in different ways with H2O ice and the regolith simulant JSC Mars-1. Such experimental results obtained with well-controlled samples in the laboratory are precious to interpret quantitatively the imaging and…
A billion or more years of possible periglacial/glacial cycling in Protonilus Mensae, Mars
Soare, R. J.; Williams, J. -P.; Hepburn, A. J. +1 more
The long-term cyclicity and temporal succession of glacial-periglacial (or deglacial) periods or epochs are keynotes of Quaternary geology on Earth. Relatively recent work has begun to explore the histories of the mid- to higher-latitudinal terrain of Mars, especially in the northern hemisphere, for evidence of similar cyclicity and succession in …
Shadow method retrievals of the atmospheric optical depth above Gale crater on Mars using HRSC images
Hoekzema, N. M.; Shaheen, Farzana; Scariah, Nayama Valsa +3 more
The 'Shadow Method' is a tool to estimate the Atmospheric Optical Depth (AOD) on Mars from the brightness of shadows. This method is derived from the equations of radiative transfer, but there are several important simplifications that together invoke errors of several tens of percent. Work by us and by others show that these errors are largely sy…
Solar occultation observations of Saturn's rings with Cassini UVIS
Colwell, J. E.; Esposito, L. W.; Becker, T. M. +2 more
The Ultraviolet Imaging Spectrograph (UVIS) instrument onboard the Cassini spacecraft observed 41 solar occultations by Saturn's rings through its extreme ultraviolet (56-118 nm) spectrographic channel. These solar occultations complement the set of stellar occultations measured by the broadband UVIS High Speed Photometer in the far ultraviolet (1…
Terrestrial Martian analogues from the Indian subcontinent: Implications for hydrological activity on Mars
Chavan, Anil; Bhandari, Subhash; Bhore, Vivek
Martian geology and surface geomorphic features are grouped under Noachian, Hesperian, and Amazonian eras, based on the crater retention ages and resurfacing ages by crater densities. Comparing the similarities and differences between Martian landforms and their terrestrial analogues promotes an understanding of how surface processes operated on b…