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Search Publications by: B. Carol Johnson (Fed)

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Displaying 101 - 125 of 358

Hyperspectral Image Projector for Advanced Sensor Characterization

December 4, 2006
Author(s)
Steven W. Brown, Joseph P. Rice, Jorge E. Neira, Bettye C. Johnson
In this work, we describe radiometric platforms able to produce realistic spectral distributions and spatial scenes for the development of application-specific metrics to quantify the performance of sensors and systems. Using these platforms, sensor and

Spectrally Tunable Sources for Advanced Radiometric Applications

October 1, 2006
Author(s)
Steven W. Brown, Joseph P. Rice, J D. Jackson, Jorge E. Neira, Bettye C. Johnson
A common radiometric platform for the development of application-specific metrics to quantify the performance of sensors and systems is described. Using this platform, systems may be quantified in terms of the accuracy of measurements of standardized sets

Hyperspectral Image Projectors for Radiometric Applications

March 23, 2006
Author(s)
Joseph P. Rice, Steven W. Brown, Bettye C. Johnson, Jorge E. Neira
We describe a new type of Calibrated Hyperspectral Image Projector (CHIP) intended for radiometric testing of instruments ranging from complex hyperspectral or multispectral imagers to simple filter radiometers. The CHIP, based on the same digital mirror

Simple Spectral Stray Light Correction Method for Array Spectroradiometers

February 20, 2006
Author(s)
Yuqin Zong, Steven W. Brown, Bettye C. Johnson, Keith R. Lykke, Yoshihiro Ohno
In many applications, the measurement accuracy of spectroradiometers, particularly instruments with a single dispersive element, is limited by the presence of stray radiation within the instrument. A simple, practical method has been developed to correct a

Correction of Stray Light in Spectrographs: Implications for Remote Sensing

August 22, 2005
Author(s)
Yuqin Zong, Steven W. Brown, Bettye C. Johnson, Keith R. Lykke, Yoshihiro Ohno
Spectrographs are used in a variety of applications in the field of remote sensing for radiometric measurements due to the benefits of measurement speed, sensitivity, and portability. However, spectrographs are single grating instruments that are

Advances in Radiometry for Ocean Color

November 10, 2003
Author(s)
Steven W. Brown, D K. Clark, Bettye C. Johnson, Howard W. Yoon, Keith R. Lykke, S Flora, M Feinholz, N Souaidia, C Pietras, Thomas C. Stone, M Yarbrough, Y S. Kim, R Barnes, J Mueller
Organic materials in the oceans have spectral signatures based on their light-scattering properties. These optical properties are related to bio-physical and bio-chemical data products, such as the concentration of phytoplankton chlorophyll-α, through bio