urn:nasa:pds:mer_apxs_composites_library:data:mer_apxs_composites_metadata 1.1 1.20.0.0 Product_Observational Knight, A. L.; VanBommel, S. J.; Gellert, R. 2024 10.17189/fmmx-db70 This table contains characteristics used to filter and create composite X-ray spectra data from the Alpha Particle X-ray Spectrometer on Mars Exploration Rovers 1 and 2 (Opportunity and Spirit). 2025-11-03 1.1 Updated external references and investigation area name. 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 data_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. mer_apxs_composites_metadata.csv

Column Headings 0 359 7-Bit ASCII Text Comma-separated names of columns in the data table.

MER APXS Composite Spectra Metadata 359 PDS DSV 1 177 Carriage-Return Line-Feed Comma 21 0 Composite Number 1 ASCII_Integer Unique Composite Integer Identifier Rover 2 ASCII_String Rover that Acquired Data in Composite (1 = Spirit or 2 = Opportunity) Site 3 ASCII_String Location Rover Analyzed Samples in Composite Location 4 ASCII_String Large-Scale Location of Measurements in Composite Within Landing Site Feature 5 ASCII_String Medium-Scale Location of Measurements in Composite Within Landing Site Target Name 6 ASCII_String Designated APXS Target Names Assigned by MER Team within Composite Target Type 7 ASCII_String Type of Sample Material within Composite Sample Prep (Brushed) 8 ASCII_String Whether the Samples in the Composite were Brushed in Preparation for Analysis or Not Sample Prep (Ground) 9 ASCII_String Whether the Samples in the Composite were Ground in Preparation for Analysis or Not Sample Prep (Brushed or Ground) 10 ASCII_String Whether the Samples in the Composite were Brushed or Ground in Preparation for Analysis or Not Sample Prep (Trench/Tracks/Scuff) 11 ASCII_String Whether the Samples in the Composite were Located in Trench, Tracks, or Scuff Sample Prep (Disturbed - RAT or Wheel) 12 ASCII_String Whether the Samples in the Composite were Disturbed with the RAT or by the Wheels (i.e., Located in Trench, Tracks, or Scuff) Formation/Grouping 13 ASCII_String Sedimentary Grouping To Which Samples in the Composite Belong (Formation or Other Grouping) Veins Present 14 ASCII_String Whether Veins have been Identified in Samples in the Composite Meteorite 15 ASCII_String Whether the Composite Contains Spectra Classified as a Meteorite or Meteorite Candidate Spherules 16 ASCII_String Qualitative Extent of Spherules within Sample Endeavour Crater 17 ASCII_String Whether the Composite Contains Spectra Located in Endeavour Crater or Not Columbia Hills 18 ASCII_String Whether the Composite Contains Spectra Located in the Columbia Hills or Not Fe3+/FeT 19 ASCII_String Ratio of Fe3+ to Total Fe as Determined by the Mossbauer Spectrometer After Sol 1000 20 ASCII_String Whether the Composite Contains Spectra Acquired After Sol 1000 or Not Geochemical Characteristics 21 ASCII_String Shared Elemental Composition Characteristics of Samples in Composite