Data reduction of CRISM data to highlight alteration minerals

CRISM (Compact Reconnaissance Imaging Spectrometer for Mars) hyperspectral data have a spatial resolution ranging from 12 to 36m/pixel allowing the high resolution mapping of minerals at the surface of Mars. However, the signal-to-noise ratio (SNR) makes challenging the discrimination of minerals spectrally close such as certain phyllosilicates and carbonates. Here, we discuss different processing of data reduction used to improve the signal-to-noise ratio and to highlight the alteration minerals at the surface of Mars and their limit. We show that our tool allows to understand trends in global mineralogy present in hyperspectral data cube.

[1]  Y. Langevin,et al.  Summer Evolution of the North Polar Cap of Mars as Observed by OMEGA/Mars Express , 2005, Science.

[2]  John F. Mustard,et al.  Identification of hydrated silicate minerals on Mars using MRO‐CRISM: Geologic context near Nili Fossae and implications for aqueous alteration , 2009 .

[3]  John C. Russ,et al.  The Image Processing Handbook , 2016, Microscopy and Microanalysis.

[4]  Ralph B. D'Agostino,et al.  Goodness-of-Fit-Techniques , 2020 .

[5]  Patrick C. McGuire,et al.  Mineralogy and morphology of geologic units at Libya Montes, Mars: Ancient aqueously derived outcrops, mafic flows, fluvial features, and impacts , 2013 .

[6]  Jean-Pierre Bibring,et al.  Hydrous minerals on Mars as seen by the CRISM and OMEGA imaging spectrometers: Updated global view , 2013 .

[7]  William H. Farrand,et al.  Spectrophotometric properties of materials observed by Pancam on the Mars Exploration Rovers: 2. Opportunity , 2006 .

[8]  Raymond E. Arvidson,et al.  Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on Mars Reconnaissance Orbiter (MRO) , 2007 .

[9]  S. Gaffey,et al.  Spectral reflectance of carbonate minerals in the visible and near infrared (0.35–2.55 um): Anhydrous carbonate minerals , 1987 .

[10]  Patrick C. McGuire,et al.  An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data , 2009, 0903.3672.

[11]  M. Darby Dyar,et al.  Coordinated spectral and XRD analyses of magnesite‐nontronite‐forsterite mixtures and implications for carbonates on Mars , 2013 .

[12]  M. D. Dyar,et al.  Reflectance and emission spectroscopy study of four groups of phyllosilicates: smectites, kaolinite-serpentines, chlorites and micas , 2008, Clay Minerals.

[13]  R. Clark,et al.  High spectral resolution reflectance spectroscopy of minerals , 1990 .

[14]  William H. Farrand,et al.  Spectrophotometric properties of materials observed by Pancam on the Mars Exploration Rovers: 1. Spirit: PANCAM PHOTOMETRY-SPIRIT , 2006 .