تقرير
Visible - Near Infrared Spectral Indices for Mapping Mineralogy and Chemistry with OSIRIS-REx
| العنوان: | Visible - Near Infrared Spectral Indices for Mapping Mineralogy and Chemistry with OSIRIS-REx |
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| المؤلفون: | Hannah H Kaplan, Victoria E Hamilton, Ellen Howell, F Scott Anderson, Antonella Barrucci, John Brucato, Tom Burbine, Beth Clark, Ed Cloutis, Joshua Emery, Sonia Fornasier, Cateline Lantz, Lucy Lim, Frederic Merlin, Alice Praet, Dennis Reuter, Scott Sanford, Amy Simon, Driss Takir, Dante Lauretta |
| المصدر: | Meteoritics and Planetary Science. 55(4) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Chemistry And Materials (General) |
| الوصف: | The primary objective of the Origins, Spectral Interpretation, Resource Identification, SecurityRegolith Explorer (OSIRIS-REx) mission is to return to Earth a pristine sample of carbonaceous material from the primitive asteroid (101955) Bennu. To support compositional mapping as part of sample site selection and characterization, we tested 95 spectral parameters on visible to near infrared laboratory reflectance data of minerals and carbonaceous meteorites to find which of these parameters reliably identified spectral features of interest. Most spectral parameters had high positive detection rates when used on spectra of pure, single component materials. The meteorite spectra have fewer and weaker absorption features and, as a result, fewer detections with the spectral parameters. Parameters targeting absorptions at 0.7 and 2.7 – 3 µm, which arise due to hydrated minerals, were most successful for the meteorites. Based on these results, we have identified a set of 17 parameters that are most likely to be useful at Bennu and spectral analogs. These parameters detect olivines, pyroxenes, carbonates, water/OH-bearing minerals, serpentines, ferric minerals, and organics. Particle size and albedo are known to affect band depth but had a negligible impact on parameter accuracy. The effect of instrument-like noise added to the laboratory spectra can result in more false positive detections, but these exhibit large errors. Our study has determined the prioritization of spectral parameters used for OSIRISREx spectral analysis and mapping and informs the reliability of all parameter-derived data products. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1945-5100 1086-9379 |
| DOI: | 10.1111/maps.13461 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20200001593 |
| ملاحظات: | NNJ13HA01C |
| رقم الأكسشن: | edsnas.20200001593 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 19455100 10869379 |
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| DOI: | 10.1111/maps.13461 |