DAWN GRAND MAP VESTA NEUTRON ABSORPTION V1.0

A global map of a unitless compositional parameter, delta-C_perpendicular (DCP), and propagated 1-sigma uncertainties is provided. DCP varies linearly with the macroscopic thermal neutron absorption cross section of Vesta's regolith. An equation for converting tabulated DCP values to absorption units is provided in this document. DCP was determined from thermal and epithermal neutron counting rates measured by the NASA Dawn mission's Gamma Ray and Neutron Detector (GRaND) while in low altitude mapping orbit, about 210 km from Vesta's surface. The measurements are representative of Vesta's bulk regolith composition to depths of a few decimeters with a spatial resolution of about 300-km full-width-at-half-maximum of arc length on the surface. The methods used to determine neutron absorption are described by PRETTYMANETAL2013.

Data and Resources

This dataset has no data

Field Value
accessLevel public
accrualPeriodicity irregular
bureauCode {026:00}
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catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
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identifier urn:nasa:pds:context_pds3:data_set:data_set.dawn-a-grand-5-vesta-absorption-v1.0
issued 2018-06-26
landingPage https://pds.nasa.gov/ds-view/pds/viewDataset.jsp?dsid=DAWN-A-GRAND-5-VESTA-ABSORPTION-V1.0
modified 2020-01-29
programCode {026:005}
publisher National Aeronautics and Space Administration
references {https://pds.nasa.gov}
resource-type Dataset
source_datajson_identifier true
source_hash 78a2813e7d3864d94cd4ea6043a07f66a212c2d0
source_schema_version 1.1
theme {"Earth Science"}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • 4-vesta
  • amerigeo
  • amerigeoss
  • ckan
  • dawn-mission-to-vesta-and-ceres
  • geo
  • geoss
  • national
  • north-america
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer Thomas Morgan
maintainer_email thomas.h.morgan@nasa.gov
metadata_created 2025-11-21T16:56:39.933954
metadata_modified 2025-11-21T16:56:39.933958
notes A global map of a unitless compositional parameter, delta-C_perpendicular (DCP), and propagated 1-sigma uncertainties is provided. DCP varies linearly with the macroscopic thermal neutron absorption cross section of Vesta's regolith. An equation for converting tabulated DCP values to absorption units is provided in this document. DCP was determined from thermal and epithermal neutron counting rates measured by the NASA Dawn mission's Gamma Ray and Neutron Detector (GRaND) while in low altitude mapping orbit, about 210 km from Vesta's surface. The measurements are representative of Vesta's bulk regolith composition to depths of a few decimeters with a spatial resolution of about 300-km full-width-at-half-maximum of arc length on the surface. The methods used to determine neutron absorption are described by PRETTYMANETAL2013.
num_resources 0
num_tags 10
title DAWN GRAND MAP VESTA NEUTRON ABSORPTION V1.0