Publications
Filter Total Items: 335
The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um)
We have developed a digital reflectance spectral library, with management and spectral analysis software. The library includes 498 spectra of 444 samples (some samples include a series of grain sizes) measured from approximately 0.2 to 3.0 um . The spectral resolution (Full Width Half Maximum) of the reflectance data is
Authors
Roger N. Clark, Gregg A. Swayze, Andrea J. Gallagher, Trude V.V. King, Wendy M. Calvin
SPECtrum Processing Routines User's Manual Version 3 (program SPECPR)
IntroductionThe SPECtrum Processing Routines (SPECPR) is a large-scale interactive program for general one-dimensional array processing and optimized for reflectance spectroscopy data and analysis. The program processes one-dimensional arrays up to 4852 data points and the operations include addition, subtraction, multiplication, division, trigonometric functions, logarithmic and exponential funct
Authors
Roger N. Clark
SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00
No abstract available.
Authors
K. Eric Livo, Roger N. Clark, Daniel H. Knepper
SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00
No abstract available
Authors
K.E. Livo, Roger N. Clark, Daniel H. Knepper
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V. J. Grauch, J. D. Phillips, D. B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V. J. Grauch, J. D. Phillips, D. B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V. J. Grauch, J. D. Phillips, D. B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V. J. Grauch, J. D. Phillips, D. B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
Spectral Distinctions between the Leading and Trailing Hemispheres of Callisto: New Observations
An analysis of recent telescopic observations of Callisto results in new insights regarding spectral variations from the leading to the trailing hemisphere of Callisto. Examination of data in the wavelength range from 2.0 to 2.5 ??m indicates that previous suggestions of spectral differences are most likely the result of experimental uncertainty or error. Slight variations in the slope of this wav
Authors
W. M. Calvin, R. N. Clark
Evidence for ammonium-bearing minerals on Ceres
Spectra obtained from recent telescopic observation of 1-Ceres and laboratory measurements and theoretical calculations of three component mixtures of Ceres analog material suggest that an ammoniated phyllosilicate is present on the surface of the asteroid, rather than H2O frost as had been previously reported. The presence of an ammoniated phyllosilicate, most likely ammoniated saponite, on the s
Authors
Trude V. V. King, Roger N. Clark, W. M. Calvin, David M. Sherman, R. H. Brown
REMAPP-PC; remote sensing image processing software for MS-DOS personal computers
No abstract available.
Authors
Keith Eric Livo, Andrea J. Gallagher
Modeling the reflectance spectrum of Callisto 0.25 to 4.1μm
The reflectance spectrum of Callisto from 0.2 to 4.1 μm is modeled using a simultaneous intimate plus areal mixture solution of ice and dark material which satisfies absorption band depths and reflectance levels. The model uses the radiative transfer theory based on Hapke's (1981, J. Geophys. Res. 86, 3039–3054) work, optical constants of materials and includes effects of grain size and abundance
Authors
Wendy M. Calvin, Roger N. Clark