• Publications
  • Influence
Sulfuric acid on Europa and the radiolytic sulfur cycle.
TLDR
A comparison of laboratory spectra with Galileo data indicates that hydrated sulfuric acid is present and is a major component of Europa's surface, and this moon's visually dark surface material is identified as radiolytically altered sulfur polymers. Expand
Formalization and Automation of Time-Space Conflict Analysis
With increasing pressure for shorter delivery schedules, space is a critical resource at construction sites. Current industry practice lacks a formalized approach or tool to help project managersExpand
Hydrogen peroxide on the surface of Europa.
TLDR
Spatially resolved infrared and ultraviolet wavelength spectra of Europa's leading, anti-jovian quadrant observed from the Galileo spacecraft show absorption features resulting from hydrogen peroxide, demonstrating that Europa's surface chemistry is dominated by radiolysis. Expand
A tenuous carbon dioxide atmosphere on Jupiter's moon Callisto.
  • R. Carlson
  • Materials Science, Medicine
  • Science
  • 5 February 1999
TLDR
An off-limb scan of Callisto was conducted by the Galileo near-infrared mapping spectrometer to search for a carbon dioxide atmosphere, finding either the atmosphere is transient and was formed recently or some process is currently supplying carbon dioxide to the atmosphere. Expand
Fresh Ammonia Ice Clouds in Jupiter: I. Spectroscopic Identification, Spatial Distribution, and Dynamical Implications
We report the first spectroscopic detection of discrete ammonia ice clouds in the atmosphere of Jupiter, as discovered utilizing the Galileo Near-Infrared Mapping Spectrometer (NIMS). SpectrallyExpand
The Sm-Nd history of KREEP
Sm-Nd whole rock measurements on a variety of KREEP-rich samples from different landing sites are reported. Despite a variation of Nd and Sm concentrations of almost a factor of 3, the Sm-Nd ratios,Expand
Near-Infrared Mapping Spectrometer experiment on Galileo
The Galileo Near-Infrared Mapping Spectrometer (NIMS) is a combination of imaging and spectroscopic methods. Simultaneous use of these two methods yields a powerful combination, far greater than whenExpand
Columbia River volcanism - The question of mantle heterogeneity or crustal contamination
Basalts from the Columbia River flood basalt province of the northwestern U.S.A. show a large diversity in chemical and Nd and Sr isotopic compositions. 143Nd144Nd ranges from 0.51303 to 0.51208 andExpand
Salts on Europa's surface detected by Galileo's near infrared mapping spectrometer. The NIMS Team.
TLDR
Reflectance spectra obtained by Galileo's Near Infrared Mapping Spectrometer exhibit distorted water absorption bands that indicate the presence of hydrated minerals, and may represent evaporite deposits formed by water, rich in dissolved salts, reaching the surface from a water-rich layer underlying an ice crust. Expand
Non‐water‐ice constituents in the surface material of the icy Galilean satellites from the Galileo near‐infrared mapping spectrometer investigation
We present evidence for several non-ice constituents in the surface material of the icy Galilean satellites, using the reflectance spectra returned by the Galileo near infrared mapping spectrometerExpand
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