Publications
Filter Total Items: 338
Classification of leafy spurge with earth observing-1 advanced land imager Classification of leafy spurge with earth observing-1 advanced land imager
Leafy spurge (Euphorbia esula L.) is an invasive exotic plant that can completely displace native plant communities. Automated techniques for monitoring the location and extent of leafy spurge, especially if available on a seasonal basis, could add greatly to the effectiveness of control measures. As part of a larger study including multiple sensors, this study examines the utility of...
Authors
S. Stitt, R. Root, K. Brown, S. Hager, C. Mladinich, G.L. Anderson, K. Dudek, M.R. Bustos, R. Kokaly
Spectroscopic and x-ray diffraction analyses of asbestos in the World Trade Center dust: Asbestos content of the settled dust Spectroscopic and x-ray diffraction analyses of asbestos in the World Trade Center dust: Asbestos content of the settled dust
On September 17 and 18, 2001, samples of settled dust and airfall debris were collected from 34 sites within a 1-km radius of the WTC collapse site, including a sample from an indoor location unaffected by rainfall, and samples of insulation from two steel beams at Ground Zero. Laboratory spectral and x-ray diffraction analyses of the field samples detected trace levels of serpentine...
Authors
Gregg A. Swayze, Roger N. Clark, Stephen J. Sutley, Todd M. Hoefen, Geoffrey S. Plumlee, Gregory P. Meeker, Isabelle Brownfield, Keith E. Livo, Laurie C. Morath
The use of synthetic jarosite as an analog for natural jarosite The use of synthetic jarosite as an analog for natural jarosite
The presence of jarosite in soil or mining waste is an indicator of acidic sulfate-rich conditions. Physical and chemical properties of synthetic jarosites are commonly used as analogs in laboratory studies to determine solubility and acid-generation of naturally occurring jarosites. In our work we have mineralogically and chemically characterized both natural and synthetic jarosites...
Authors
George A. Desborough, Kathleen S. Smith, Heather A. Lowers, Gregg A. Swayze, Jane M. Hammarstrom, Sharon F. Diehl, Rhonda L. Driscoll, Reinhard W. Leinz
Cassini observations of flow-like features in western Tui Regio, Titan Cassini observations of flow-like features in western Tui Regio, Titan
A large (>3 ?? 104 km2), lobate, 5-??m-bright region seen by Cassini on Titan's leading equatorial region is best explained as a flow field. We discuss observations from the Visual and Infrared Mapping Spectrometer and Imaging Science Subsystem of the feature and present a map of the field. We establish relative ages of flow features and discuss possible formation mechanisms and the...
Authors
J. W. Barnes, R. H. Brown, J. Radebaugh, B. J. Buratti, Christophe Sotin, Stéphane Le Mouélic, S. Rodriguez, E. P. Turtle, J. Perry, R. Clark, K. H. Baines, P. D. Nicholson
Titan: Preliminary results on surface properties and photometry from VIMS observations of the early flybys Titan: Preliminary results on surface properties and photometry from VIMS observations of the early flybys
Cassini observations of the surface of Titan offer unprecedented views of its surface through atmospheric windows in the 1-5 ??m region. Images obtained in windows for which the haze opacity is low can be used to derive quantitative photometric parameters such as albedo and albedo distribution, and physical properties such as roughness and particle characteristics. Images from the early...
Authors
B. J. Buratti, Christophe Sotin, R. H. Brown, M.D. Hicks, R. N. Clark, J. A. Mosher, T. B. McCord, R. Jaumann, K. H. Baines, P. D. Nicholson, T. Momary, D.P. Simonelli, B. Sicardy
Photometric properties of Titan's surface from Cassini VIMS: Relevance to titan's hemispherical albedo dichotomy and surface stability Photometric properties of Titan's surface from Cassini VIMS: Relevance to titan's hemispherical albedo dichotomy and surface stability
The Visual and Infrared Mapping Spectrometer (VIMS) instrument on the Cassini Saturn Orbiter returned spectral imaging data as the spacecraft undertook six close encounters with Titan beginning 7 July, 2004. Three of these flybys each produced overlapping coverage of two distinct regions of Titan's surface. Twenty-four points were selected on approximately opposite hemispheres to serve...
Authors
R.M. Nelson, R. H. Brown, B.W. Hapke, W. D. Smythe, L. Kamp, M.D. Boryta, F. Leader, K. H. Baines, G. Bellucci, J.-P. Bibring, B. J. Buratti, F. Capaccioni, P. Cerroni, R. N. Clark, M. Combes, A. Coradini, D. P. Cruikshank, P. Drossart, V. Formisano, R. Jaumann, Y. Langevin, D. L. Matson, T. B. McCord, V. Mennella, P. D. Nicholson, B. Sicardy, Christophe Sotin
High-resolution CASSINI-VIMS mosaics of Titan and the icy Saturnian satellites High-resolution CASSINI-VIMS mosaics of Titan and the icy Saturnian satellites
The Visual Infrared Mapping Spectrometer (VIMS) onboard the CASSINI spacecraft obtained new spectral data of the icy satellites of Saturn after its arrival at Saturn in June 2004. VIMS operates in a spectral range from 0.35 to 5.2 ??m, generating image cubes in which each pixel represents a spectrum consisting of 352 contiguous wavebands. As an imaging spectrometer VIMS combines the
Authors
R. Jaumann, K. Stephan, R. H. Brown, B. J. Buratti, R. N. Clark, T. B. McCord, A. Coradini, F. Capaccioni, G. Filacchione, P. Cerroni, K. H. Baines, G. Bellucci, J.-P. Bibring, M. Combes, D. P. Cruikshank, P. Drossart, V. Formisano, Y. Langevin, D. L. Matson, R.M. Nelson, P. D. Nicholson, B. Sicardy, Christophe Sotin, L. A. Soderblom, C. Griffith, K.-D. Matz, Th. Roatsch, F. Scholten, C.C. Porco
The future of imaging spectroscopy - Prospective technologies and applications The future of imaging spectroscopy - Prospective technologies and applications
Spectroscopy has existed for more than three centuries now. Nonetheless, significant scientific advances have been achieved. We discuss the history of spectroscopy in relation to emerging technologies and applications. Advanced focal plane arrays, optical design, and intelligent on-board logic are prime prospective technologies. Scalable approaches in pre-processing of imaging...
Authors
M.E. Schaepman, R.O. Green, S.G. Ungar, B. Curtiss, J. Boardman, A.J. Plaza, B.-C. Gao, S. Ustin, R. Kokaly, J.R. Miller, S. Jacquemoud, E. Ben-Dor, R. Clark, C. Davis, J. Dozier, D.G. Goodenough, D. Roberts, G. Swayze, E.J. Milton, Alexander F.H. Goetz
On the discovery of CO nighttime emissions on Titan by Cassini/VIMS: Derived stratospheric abundances and geological implications On the discovery of CO nighttime emissions on Titan by Cassini/VIMS: Derived stratospheric abundances and geological implications
We present a quantitative analysis of CO thermal emissions discovered on the nightside of Titan by Baines et al. [2005. The atmospheres of Saturn and Titan in the near-infrared: First results of Cassini/VIMS. Earth, Moon, and Planets, 96, 119-147]. in Cassini/VIMS spectral imagery. We identify these emission features as the P and R branches of the 1-0 vibrational band of carbon monoxide...
Authors
K. H. Baines, P. Drossart, M. A. Lopez-Valverde, S.K. Atreya, Christophe Sotin, T.W. Momary, R. H. Brown, B. J. Buratti, R. N. Clark, P. D. Nicholson
Evidence for a polar ethane cloud on Titan Evidence for a polar ethane cloud on Titan
Spectra from Cassini's Visual and Infrared Mapping Spectrometer reveal the presence of a vast tropospheric cloud on Titan at latitudes 51?? to 68?? north and all longitudes observed (10?? to 190?? west). The derived characteristics indicate that this cloud is composed of ethane and forms as a result of stratospheric subsidence and the particularly cool conditions near the moon's north...
Authors
C.A. Griffith, P. Penteado, P. Rannou, R. Brown, V. Boudon, K. H. Baines, R. Clark, P. Drossart, B. Buratti, P. Nicholson, C.P. McKay, A. Coustenis, A. Negrao, R. Jaumann
The atmospheres of Saturn and Titan in the near-infrared: First results of Cassini/Vims The atmospheres of Saturn and Titan in the near-infrared: First results of Cassini/Vims
The wide spectral coverage and extensive spatial, temporal, and phase-angle mapping capabilities of the Visual Infrared Mapping Spectrometer (VIMS) onboard the Cassini-Huygens Orbiter are producing fundamental new insights into the nature of the atmospheres of Saturn and Titan. For both bodies, VIMS maps over time and solar phase angles provide information for a multitude of atmospheric
Authors
K. H. Baines, T.W. Momary, B. J. Buratti, D. L. Matson, R.M. Nelson, P. Drossart, B. Sicardy, V. Formisano, G. Bellucci, A. Coradini, C. Griffith, R. H. Brown, J.-P. Bibring, Y. Langevin, F. Capaccioni, P. Cerroni, R. N. Clark, M. Combes, D. P. Cruikshank, R. Jaumann, T.B. McCordt, V. Mennella, P. D. Nicholson, Christophe Sotin
Remote sensing characterization of the Animas River watershed, southwestern Colorado, by AVIRIS imaging spectroscopy Remote sensing characterization of the Animas River watershed, southwestern Colorado, by AVIRIS imaging spectroscopy
Visible-wavelength and near-infrared image cubes of the Animas River watershed in southwestern Colorado have been acquired by the Jet Propulsion Laboratory's Airborne Visible and InfraRed Imaging Spectrometer (AVIRIS) instrument and processed using the U.S. Geological Survey Tetracorder v3.6a2 implementation. The Tetracorder expert system utilizes a spectral reference library containing...
Authors
J.B. Dalton, D. J. Bove, C.S. Mladinich