Space and Planetary Sciences
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Item Dataset for Effects of Progressive Oxidation on the Jezero Crater Floor: Insights from Terrestrial Analogs and Multispectral Observations Acquired by the Mars2020 Perseverance RoverBarrington, Megan N.; Rice, Melissa S.; Tate, Christian D.; Johnson, Jeffrey R.; Hayes, Alexander G.; Gabbert, Max; Eng, Alivia; Kathir, Bavani; Lapo, Kristiana; Duflot, Louise; Seeger, Christina (2025)The floor of Jezero Crater is composed of two major igneous formations, Séítah and Máaz. The members of these formations are variable in composition, weathering extent, and redox conditions, which together have the potential to shed light on the geologic and aqueous history of the region. While Mastcam-Z has collected a wealth of visible/near-infrared multispectral data in Jezero’s crater floor, untangling whether observed spectral features are the result of composition or weathering is often ambiguous. To break this ambiguity, we characterize the spectral effects of oxidation in Séítah and Máaz by comparison with terrestrial analog multispectral data acquired both in the field and the laboratory. We find that the rates of correlated spectral features related to oxidation are statistically similar between Séítah, Máaz and Content, a member observed in the Séítah formation with compositional similarities to Máaz. Further, we establish a framework for assessing relative oxidation across other multispectral datasets of igneous compositions on Mars. Finally, using both a notional and adapted stratigraphy of Séítah, we show variation between oxidation and hydration signatures within the Crater floor’s stratigraphic sequence. We find no evidence of pre-burial oxidation in members of Jezero’s Crater floor, indicating that oxidation trends are dominated by post-burial, and possibly post-exhumation oxidation.Item Dataset for Mastcam-Z Analog Spectral Imager (MASI): A Mastcam-Z Testbed and Field InstrumentBarrington, Megan N.; Tate, Christian D.; Hayes, Alexander G. (2025)These files contain data supporting the results reported in Barrington et al. Mastcam-Z Analog Spectral Imager (MASI): A Mastcam-Z Testbed and Field Instrument. In Barrington et al., we describe the Mastcam-Z Analog Spectral Imager (MASI). Mastcam-Z is a stereoscopic, zoomable multispectral imaging system located on the Remote Sensing Mast (RSM) of the Perseverance Rover. Mastcam-Z is the first zoomable multispectral imaging system flown on a NASA spacecraft. The Mastcam-Z Analog Spectral Imager is a Mastcam-Z emulator built at Cornell University for three primary purposes: 1) to serve as a testbed for the pre-flight radiometric and geometric calibration of Mastcam-Z, 2) to characterize Mastcam-Z anomalies observed during calibration and operation, and 3) to act as a field instrument for collecting terrestrial analog multispectral data with the same resolution and spectral characteristics as Mastcam-Z images acquired on Mars. MASI is engineered using a combination of commercial off-the-shelf (COTS) components and Mastcam-Z flight spare hardware, and is calibrated using a similar set of algorithms to the flight instruments. We show that MASI produces reflectance values that are similar to Mastcam-Z laboratory and inflight values, and provide a detailed description of MASI’s hardware, software, and spectral data products.Item Data from the Cornell coherent scatter radar imagerHysell, D.L. (2024-03-11)This archive contains data from the Cornell coherent scatter radar interferometer which has been deployed in numerous sites around the world including the Caribbean, Alaska, and in Ithaca, New York. The data are partially reduced and exist here in the form of spectra and interferometric cross spectra. The data are relasesed without license. Users are required to confer with the author before making use of the data in publications or presentations.Item Dataset for Quantifying Morphological Changes & Sediment Transport Pathways on Comet 67P/Churyumov-GerasimenkoBarrington, Megan N.; Birch, Samuel P. D.; Jindal, Abhinav; Hayes, Alexander G.; Corlies, Paul; Vincent, Jean-Baptiste (2023-06-07)These files contain data supporting the results reported in Barrington et al., 2023: Quantifying Morphological Changes and Sediment Transport Pathways on Comet 67P/Churyumov-Gerasimenko. In Barrington et al., 2023 we found the following: Comets are active geological worlds with primitive surfaces that have been shaped to varying degrees by sublimation-driven sediment transport processes and mass wasting process. Rosetta’s rendezvous with comet 67P/Churyumov-Gerasimenko (67P) in 2014 provided data with the necessary spatial and temporal resolutions to observe many evolutionary processes on micro-gravity worlds. Rosetta’s observations have thus far revealed that many changes to the surface occurred within 67P’s smooth terrains, vast sedimentary deposits that blanket a significant fraction of the nucleus. Understanding the global context of these changes, and therefore the sediment transport pathways that govern the evolution of 67P’s surface requires a thorough description of their changing morphologies, and an evaluation of existing global-scale spatial and temporal trends. Accordingly, we present a time-resolved synthesis of erosion and deposition activity on comet 67P as it passed through its August 13, 2015 perihelion from September, 2014 to August, 2016. Our mapping results indicate that, around perihelion, sediment is globally redistributed inter-regionally from 67P’s more active south to the north. Equally important, however, are local, topographically-influenced sediment transport processes, with large volumes of sediment moving intra-regionally over sub-kilometer distances. We also show evidence for regions of near-zero net erosion/deposition between approximately 30–60° N latitude, which may act as terminal sedimentary sinks, with remobilization of these materials hindered by multiple factors. Our work therefore provides the most complete mapping of sediment transport processes and pathways across 67P, a critical step toward understanding the global landscape evolution of both 67P and other comets.Item Data from the Cornell coherent scatter radar imagerHysell, D.L. (2022-12-01)This archive contains data from the Cornell coherent scatter radar interferometer which has been deployed in numerous sites around the world including the Caribbean, Alaska, and in Ithaca, New York. The data are partially reduced and exist here in the form of spectra and interferometric cross spectra. The data are relasesed without license. Users are required to confer with the author before making use of the data in publications or presentations.Item Data from the Cornell coherent scatter radar imagerHysell, D.L. (2021-03-08)This archive contains data from the Cornell coherent scatter radar interferometer which has been deployed in numerous sites around the world including the Caribbean, Alaska, and in Ithaca, New York. The data are partially reduced and exist here in the form of spectra and interferometric cross spectra. The data are relasesed without license. Users are required to confer with the author before making use of the data in publications or presentations.