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Full-Text Articles in Physical Sciences and Mathematics
An Automated Spectrogoniometer System With Planetary Science Applications, Kathleen Hoza
An Automated Spectrogoniometer System With Planetary Science Applications, Kathleen Hoza
Scholars Week
Reflectance spectroscopy is a major technique for characterizing the composition of planetary surfaces, and has led to key findings such as the characterization of alteration minerals indicative of an aqueous, neutral-pH environment in Mars’ past. When a reflectance spectrometer collects data, it does so at some viewing geometry, which is defined by the angular relationships between the light source illuminating the surface, the target material, and the detector. In the lab, this is usually at a standard viewing geometry (e.g. incidence=0, emission=30). In situ measurements taken by spacecraft, however, may be taken at a wide range of viewing geometries. This …
Photometric Investigations Of Weathering Rinds And Coatings With Implications For Mars, Kathleen Hoza
Photometric Investigations Of Weathering Rinds And Coatings With Implications For Mars, Kathleen Hoza
WWU Graduate School Collection
Reflectance spectroscopy is a major technique for characterizing the composition of planetary surfaces, and has led to many key findings in planetary geology. In laboratory measurements, reflectance spectrometers typically acquire data using a standard, fixed viewing geometry. Measurements from spacecraft, however, may be acquired at a wide range of viewing geometries, depending on the orientation of the instrument relative to the target surface and the Sun. For many materials, the impact of viewing geometry on reflectance is minor; however, some materials’ spectral signatures can be influenced by these photometric effects. In particular, spectra of weathering rinds and rock coatings are …