CaSSIS has acquired colour coverage of ~5% of the surface of Mars. But what's it missing?
The Colour and Stereo Surface Imaging System (CaSSIS) Resampled Data Record (CaRDR) is an attempt to answer that question. CaRDR is a near-global, four-band multispectral dataset at ~90 m/pixel, built by spectrally resampling the CRISM hyperspectral mapping archive into the exact colour bands of the CaSSIS instrument. The result is a consistent, CaSSIS-style view of ~99.9% of the Martian surface at a scale that sits between broad global surveys and the narrow footprints of high-resolution targeted imaging.
The dataset enables smarter targeting of future high-resolution observations by acting as a 'multispectral viewfinder' that provides surface context before a targeted image is acquired, and opens new opportunities to investigate surface composition and mineralogical variation at regional scales across Mars.
[Picture]
A comparison between (a) original CRISM VRDR RGB product and (b) our CaSSIS-resampled "CaRDR" dataset, showing reduced swath-to-swath striping.
The CaRDR Dataset (LINK) is available on the Natural History Museum's Data Portal.
McNeil and Stabbins (in prep)
McNeil and Stabbins (in prep)