P. L. Karnes's research while affiliated with Southwest Research Institute and other places

Publications (5)

Article
We report new measurements of the far-ultraviolet (FUV) bidirectional reflectance of Apollo soil 10084 from the Southwest Research Institute ultraviolet reflectance chamber. The bidirectional reflectance distribution function of this mare soil, enriched in Ti and Fe content, is rather featureless in the FUV wavelength region of 115–180 nm, except f...
Article
Far ultraviolet albedo maps obtained using the Lunar Reconnaissance Orbiter (LRO) Lyman Alpha Mapping Project (LAMP) uniquely address lunar volatile processes.
Article
The Southwest Research Institute Ultraviolet Reflectance Chamber (SwURC) is a highly capable UV reflectometer chamber and data acquisition system designed to provide bidirectional scattering data of various surfaces and materials. The chamber provides laboratory-based UV reflectance measurements of water frost/ice, lunar soils, simulants, and analo...
Article
LAMP measurements indicate ~1-2% surface water frost abundances in a few PSRs based on spectral color comparisons, and we find that many PSRs may have porosities of ~0.7 based on relatively low albedos at Lyman-α.

Citations

...  SwRI CLASSE (Center for Laboratory Astrophysics and Space Science Experiments): Multiple ultrahigh vacuum systems that houses < 10 K cryostats mounted with sample holders that support quartz crystal microbalance (QCM) and transmission substrates, equipped with optical spectrometers (0.1-15 microns), radiation sources (10 keV electron gun, 5 keV mass filtered ion gun). Capability to measure bidirectional reflectance/phase curves of planetary analogs in the far-ultraviolet (Raut et al., 2018). ...