urn:nasa:pds:mer_apxs_composites_library 1.1 1.20.0.0 Product_Bundle Knight, A. L.; VanBommel, S. J.; Gellert, R. 2024 10.17189/fmmx-db70 This bundle contains a library of target characteristics, metadata, composite spectra, and concentrations created from individual spectra acquired by the Alpha Particle X-ray Spectrometers on Mars Exploration Rovers 1 and 2 (Opportunity and Spirit). 2025-11-03 1.1 Updated external references, investigation area name, and readme.txt. 2024-06-06 1.0 Initial version 2004-01-05Z 2018-06-10Z Science Calibrated Surface Geosciences Mars Exploration Rovers: Spirit and Opportunity Mission urn:nasa:pds:context:investigation:mission.mars_exploration_rover bundle_to_investigation Mars Exploration Rover 1 Host urn:nasa:pds:context:instrument_host:spacecraft.mer1 is_instrument_host Alpha Particle X-ray Spectrometer Instrument urn:nasa:pds:context:instrument:apxs.mer1 is_instrument Mars Exploration Rover 2 Host urn:nasa:pds:context:instrument_host:spacecraft.mer2 is_instrument_host Alpha Particle X-ray Spectrometer Instrument urn:nasa:pds:context:instrument:apxs.mer2 is_instrument Mars Planet urn:nasa:pds:context:target:planet.mars data_to_target 10.1029/2003JE002150 Rieder, R., et al., The new Athena Alpha Particle X-Ray Spectrometer (APXS) for the Mars Exploration Rovers, Journal of Geophysical Research, 2003. 10.1029/2005JE002555 Gellert, R., et al., Alpha Particle X-Ray Spectrometer (APXS): Results from Gusev crater and calibration report, Journal of Geophysical Research, 2006. 10.1029/2021JE006915 Mittlefehldt, D. W., et al., Geology and geochemistry of Noachian bedrock and alteration events, Meridiani Planum, Mars: MER Opporunity observations, Journal of Geophysical Research: Planets, 2021. 10.1029/2008JE003195 Ming, D. W., et al., Geochemical properties of rocks and soils in Gusev Crater, Mars: Results of the Alpha Particle X-Ray Spectrometer from Cumberland Ridge to Home Plate, Journal of Geophysical Research, 2008. 10.1029/2024JE008569 Knight, A. L., VanBommel, S. J., Gellert, R., Berger, J. A., Catalano, J. G., Gross, J., and Christian, J. R. (2025). Gallium and germanium concentrations from the MER Alpha Particle X-ray Spectrometers: Evidence of global trace element enrichment. Journal of Geophysical Research: Planets, 130, e2024JE008569. Archive readme.txt 0 7-Bit ASCII Text Carriage-Return Line-Feed urn:nasa:pds:mer_apxs_composites_library:data Primary bundle_has_data_collection