Green, Robert O., Rogez, Francois, Green, Rob, Ungar, Steve, Knox, Robert, Asner, Greg, ...
NASA/JPL
Measuring the Earth system in a time of global environmental change with image spectroscopy (2009)
NASA/JPL
Green, Robert O., Pieters, Carle, Mouroulis, Pantazis
The Moon Mineralogy Mapper was selected as a NASA Discovery Mission of Opportunity in February 2005. At the core of this mission is an imaging spectrometer instrument with high spectral- spatial...
Science measurement requirements for imaging spectrometers from airborne to spaceborne (2009)
Green, Robert O., Asner, Gregory P., Boardman, Joseph, Ungar, Stephen, Mouroulis, Pantazis
NASA/JPL
Optical design of a compact imaging spectrometer for planetary mineralogy (2008)
Mouroulis, Pantazis, Sellar, R. Glenn, Wilson, Daniel W., Shea, James J., Green, Robert O.
We present the design of a compact, wide-angle pushbroom imaging spectrometer suitable for exploration of solar system bodies from low orbit. The spectrometer is based on a single detector array with...
Hyperion on-orbit calibration validation with AVIRIS in Argentina (2008)
Green, Robert O., Chrien, Thomas, Pavri, Betina
NASA/JPL
Overview of AVIRIS acquisitions in Argentina as part of the NM EO-1 campaign in 2001. (2008)
Green, Robert O., Eastwood, Michael, McCubbin, Ian, Chovit, Chris, Raney, Jim, Holbrook, Jack
NASA/JPL
Spectral calibration of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) as data are acquired inflight is essential to quantitative analysis of the measured upwelling spe.dral radiance...
Robert O. Green, Mark C. Helmlinger, James E. Conel
To achieve the research objectives of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS), the sensor calibration must be valid while AVIRIS is acquiring data from the airborne platform. The...
High- and low-altitude AVIRIS observations of nocturnal lighting (2006)
Elvidge, Christopher D., Green, Robert O.
Elvidge et al. (1997) developed methods to locate and define the spatial extent of nocturnal lighting across large land areas using low-light imaging data from the Defense Meteorological Satellite...
An improved data structure for AVIRIS-type imaging spectrometer measurements (2006)
Martinez, Pablo J., Hermosel, Daniel, Green, Robert O., Plaza, Javier, Perez, Rosa M.
Imaging spectrometers, such as the Airborne Visible/Infrared Imaging (AVIRIS), measure spectra in the region from 400 to 2500 nm at nominally 10-nrn sampling. This gives approximately 200 continuous...
Proceedings of the 13th JPL Airborne Earth Science Workshop (2006)
Green, Robert O., Ben-Dor, E., Kindel, B., Bernstein, L. S., Adler-Golden, S. M., Sundberg, R. L., ...
Participants at the 13th Airborne Earth Science Workshop reported science research and applications results with spectral images measured by the NASA Airborne Invisible/Infrared Imaging Spectrometer...
Proceedings of the 12th JPL Airborne Earth Science Workshop (2005)
Green, Robert O., Asner, G. P., Nepstad, D., Cardinot, G., Moutinho, P., Harris, T., ...
Participants at the 12th Airborne Earth Science Workshop reported science research and applications results with spectral images measured by the NASA Airborne Invisible/Infrared Imaging Spectrometer...
Chrien, Thomas G., Green, Robert O.
The Airborne Visible/Infrared Imaging Spectromerte (AVIRIS) measures the upwelling radiance in 225 spectral bands. These data are acquired as images of approximately 11 by up to 100 km in extent at...
Inflight Calibration of AVIRIS in 1992 and 1993 (2004)
Green, Robert O., Conel, James E., Helmlinger, Mark, Van Den Bosch, Jeannette, Chovit, Chris, Chrien, Tom
In order to pursue the quantitative research objective of AVIRIS, the spectral, radiometric characteristic of the sensor must be known at the time of flight data acquisition. AVIRIS is rigorously...
Green, Robert O., Conel, James E.
This paper focuses on determination of the temporal and spatial gas absorption and aerosol scattering properties of the atmosphere itself including the radiative properties of clouds, specifically...
Green, Robert O., Conel, James E.
Water vapor in the atmosphere has been derived from the AVIRIS spectra measured in five overpasses acquired above Rogers Dry Lake, California. The abundance of water vapor in these data is shown to...
Mapping Target Signatures Via Partial Unmixing of Aviris Data (2004)
Boardman, Joseph W., Kruse, Fred A., Green, Robert O.
We present a method for mapping target surface materials, based on their spectral signatures, in the presence of complicated and unknown backgrounds. The targets can be major scene component.
Many algorithms for spectral analysis of imaging spectroscopy data of the Earth's surface require that the data be calibrated to surface reflectance. Calibration requires removing instrumental...
Both the surface and atmospheric characteistics were measured for a calibration target during an inflight calibration experiment held at Lunar Lake, Nevada on April 5, 1994 (Green, et al., 1995)....
Green, Robert O., Conel, James E., Roberts, Dar A.
In 1994, AVIRIS measured images of upwelling spectral radiance for BOREAS during 8 different flights including both southern and northern areas. Spectral fitting and inversion algorithms were applied...
Green, Robert O., Dozier, Jeff
Examinations of the optical constants of liquid and solid water shows that in the 1000 nm region these two phases of water are separabel based upon their spectral properties. Measurement of these two...
Estimating Canopy Water Content of Chaparral Shrubs Using Optical Methods (2004)
Ustin, Susan L., Scheer, George, Castaneda, Claudia M., Jacquemoud, Stephane, Roberts, Dar, Green, Robert O.
California chaparral ecosystems are exceptionally fire adapted and typically are subject to wildfire at decadal to century frequencies. The hot dry Mediterranean climate summers and the chaparral...
The Hyperspectral Imager Aboard the SSTI's Lewis Spacecraft: A Comparison With AVIRIS (2004)
Sokolowski, James K., Witcher, Kern, Davis, Bruce A., Green, Robert O.
This paper compares the performance and operational parameters of the Hyperspectral Imager (HSI), scheduled for launch aboard the Lewis spacecraft in July 1996, with those of the Airborne...
Green, Robert O., Roberts, Dar A., Conel, James E.
Calibrated radiance spectra measured remotely, record the integrated effects of the solar source, the atmosphere, and the surface. To pursue scientific research and applications, based on the...
Simmonds, John J., Green, Robert O.
The status of the Airborne Visible and Infrared Imaging Spectrometer (AVIRIS) is reported at the beginning of the current flight season. Sensor performance based on laboratory measurements and trend...
Calibration of the Airborne Visible/Infrared Imaging Spectrometer in the Laboratory (2004)
Chrien, Thomas G., Green, Robert O., Chovit, Christopher J., Eastwood, Michael L., Sarture, Charles M.
Imaging spectrometry data must be spectrally, radiometrically and geometrically calibrated. This calibration process is validated for in-flight performance of the sensor using a rigorous ground truth...
Retrieval of Surface Snow Grainsize and Melt Water from AVIRIS Spectra (2004)
Green, Robert O., Dozier, Jeff
The Earth's energy balance and hydrology are effected by the distribution and characteristics of snow cover on the surface. Snow grainsize and snow melt, influence surface albedo and hydrology.
Moreno, Jose F., Green, Robert O.
AVIRIS data represent a new and important approach for the retrieval of atmospheric and surface parameters from optical remote sensing data. Not only as a test for future space systems, but also as...
Estimation of Biomass Fire Temperature and Areal Extent from Calibrated AVIRIS Spectra (2004)
This paper describes an approach to derive a range of biomass fire parameters from spectra measured by NASA's Airborne Visible/Infrared Imaging Spectrometer (AVIRIS). AVIRIS measures images of the...
Subpixel Snow-Covered-Area and Snow Grain Size from Mixture Analysis with Aviris Data (2004)
Painter, Thomas H., Roberts, Dar A., Green, Robert O., Dozier, Jeff
Snow-covered-area (SCA) and snow grain size are crucial inputs to hydrologic and climatologic modeling of alpine and other seasonally snow-covered regions. SCA is necessary to parameterize energy...
Using Imaging Spectroscopy to Study Ecosystem Processes and Properties (2004)
SUSAN L. USTIN, DAR A. ROBERTS, JOHN A. GAMON, GREGORY P. ASNER, ROBERT O. GREEN
Remote sensing data provide essential input for today's climate and ecosystem models. It is generally agreed that many model processes are not accurately depicted by current remotely sensed indices...
Retrieval of subpixel snow-covered area and grain size from imaging spectrometer data (2003)
Painter, Thomas H, Dozier, Jeff, Roberts, Dar A, Davis, Robert E, Green, Robert O
We describe and validate an automated model that retrieves subpixel snow-covered area and effective grain size from Airborne Visible/ Infrared Imaging Spectrometer (AVIRIS) data. The model analyzes...
Robert O. Green, Masanobu Shimada
Earth-looking satellite sensors must be calibratcci in order to quantitatively measure and monitor components of land, water and atmosphere of the Earth Systcm. The inevitable change in performance...
Invasive plants transform the three-dimensional structure of rain forests
Asner, Gregory P., Hughes, R. Flint, Vitousek, Peter M., Knapp, David E., Kennedy-Bowdoin, Ty, Boardman, Joseph, ...
Biological invasions contribute to global environmental change, but the dynamics and consequences of most invasions are difficult to assess at regional scales. We deployed an airborne remote sensing...