Spectroscopy Lab

Publications

Filter Total Items: 336
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Year Published: 1990

REMAPP - PC computer file : remote sensing image processing software for MS - DOS personal computers, Part C - Executable code, source code, and text images

Livo, Keith Eric
REMAPP - PC computer file : remote sensing image processing software for MS - DOS personal computers, Part C - Executable code, source code, and text images; 1990; OFR; 90-88-C; Livo, Keith Eric

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Year Published: 1990

REMAPP - PC computer file : remote sensing image processing software for MS - DOS personal computers, Part D - Test images disk 1

Livo, Keith Eric
REMAPP - PC computer file : remote sensing image processing software for MS - DOS personal computers, Part D - Test images disk 1; 1990; OFR; 90-88-D; Livo, Keith Eric

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Year Published: 1990

REMAPP - PC computer file : remote sensing image processing software for MS - DOS personal computers, Part E - Test images disk 2

Livo, Keith Eric
REMAPP - PC computer file : remote sensing image processing software for MS - DOS personal computers, Part E - Test images disk 2; 1990; OFR; 90-88-E; Livo, Keith Eric

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Year Published: 1990

High spectral resolution reflectance spectroscopy of minerals

The reflectance spectra of minerals are studied as a function of spectral resolution in the range from 0.2 to 3.0 μm. Selected absorption bands were studied at resolving powers (λ/Δλ) as high as 2240. At resolving powers of approximately 1000, many OH‐bearing minerals show diagnostic sharp absorptions at the resolution limit. At low resolution,...

Clark, R. N.; King, T. V. V.; Klejwa, M.; Swayze, Gregg A.; Vergo, N.

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Year Published: 1990

High-resolution reflectance spectra of Mars in the 2.3-μm region: evidence for the mineral scapolite

patially resolved reflectance spectra of Mars in the 2.2- to 2.4-μm spectral region were obtained in August 1988 using the NASA 3-m Infrared Telescope Facility. The spectra show weak absorption features due to Martian atmospheric carbon monoxide and a surface mineral. Both CO and the mineral absorptions are composed of overlapping narrow...

Clark, Roger N.; Swayze, Gregg A.; Singer, Robert B.; Pollack, James B.
High-resolution reflectance spectra of Mars in the 2.3-??m region: evidence for the mineral scapolite; 1990; Article; Journal; Journal of Geophysical Research; Clark, R. N.; Swayze, G. A.; Singer, R. B.; Pollack, J. B.

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Year Published: 1990

Infrared spectra and crystal chemistry of scapolites: implications for Martian mineralogy

Near‐infrared and midinfrared spectra of a wide range of scapolite compositions were studied to determine the cause of the 2.36‐μm features that have been correlated with similar features in the near‐IR spectrum of Mars. We attribute the 2.36−μm features to vibrations caused by HCO3− and HSO4− in the anion sites of scapolite. The 2.36‐μm...

Swayze, Gregg A.; Clark, Roger N.

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Year Published: 1989

Shawangunk ore district, New York; geochemical and spectral data

Friedman, Jules D.; Mutschler, F.E.; Zartman, R.E.; Briggs, Paul H.; Swayze, G.A.; Thiesen, A.F.
Shawangunk ore district, New York; geochemical and spectral data; 1989; OFR; 89-193; Friedman, Jules D.; Mutschler, F. E.; Zartman, R. E.; Briggs, P. H.; Swayze, G. A.; Thiesen, A. F.

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Year Published: 1989

Spectral characteristics of chlorites and Mg‐serpentines using high‐resolution reflectance spectroscopy

The present laboratory study using high‐resolution reflectance spectroscopy (0.25–2.7 μm) focuses on two primary phyllosilicate groups, serpentines and chlorites. The results show that it is possible to spectrally distinguish between isochemical end‐members of the Mg‐rich serpentine group (chrysotile, antigorite, and lizardite) and to recognize...

King, T. V. V.; Clark, Roger N.

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Year Published: 1988

Search for volatiles on icy satellites: I. Europa

New reflectance spectra have been obtained for both the leading and trailing sides of Europa, using the Cooled Grating Array Spectrometer (CGAS) of the NASA Infrared Telescope Facility (IRTF). The spectra are of higher precision than any yet obtained. Spectra of Europa's trailing side (central meridian longitude ≈300°) obtained in 1985 show two...

Brown, R. H.; Cruikshank, D. P.; Tokunaga, A. T.; Smith, R. G.; Clark, Roger N.

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Year Published: 1986

Europa: Characterization and interpretation of global spectral surface units

The Voyager global multispectral mosaic of the Galilean satellite Europa (T. V. Johnson, L. A. Soderblom, J. A. Mosher, G. E. Danielson, A. F. Cook, and P. Kupferman, 1983, J. Geophys. Res. 88, 5789–5805) was analyzed to map surface units with similar optical properties (T. B. McCord, M. L. Nelson, R. N. Clark, A. Meloy, W. Harrison...

Nelson, M. L.; McCord, T. B.; Clark, Roger N.; Johnson, T. V.; Matson, D. L.; Mosher, J. A.; Soderblom, Laurence A.

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Year Published: 1984

Reflectance spectroscopy: Quantitative analysis techniques for remote sensing applications

Several methods for the analysis of remotely sensed reflectance data are compared, including empirical methods and scattering theories, both of which are important for solving remote sensing problems. The concept of the photon mean optical path length and the implications for use in modeling reflectance spectra are presented. It is shown that the...

Clark, Roger N.; Roush, T. L.

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Year Published: 1984

Spectral properties of ice‐particulate mixtures and implications for remote sensing: 1. Intimate mixtures

The spectral properties of water ice‐particulate mixtures are studied for the purpose of deriving the ice and particulate abundances from remotely obtained spectra (particulates referring to nonicy materials in the form of grains). Reflectance levels and ice absorption band depths are a complex function of the single scattering albedo of the...

Clark, Roger N.; Lucey, Paul G.