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You searched on: Author: bettye johnson

Displaying records 21 to 30 of 159 records.
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21. The Marine Optical BuoY (MOBY) Radiometric Calibration and Uncertainty Budget for Ocean Color Satellite Sensor Vicarious Calibration
Published: 11/1/2007
Authors: Steven W Brown, S Flora, M Feinholz, M Yarbrough, Terrance Houlihan, D Peters, Yong S. Kim, J Mueller, Bettye C Johnson, Dennis Clark
Abstract: For the past decade, the Marine Optical Buoy (MOBY), an autonomous radiometric buoy stationed in the waters off Lanai, Hawaii, has been the primary in-water oceanic observatory for the vicarious calibration of U. S. satellite ocean color sensors, inc ...

22. Results in Coastal Waters With High Resolution In Situ Spectral Radiometry: The Marine Optical System ROV
Published: 10/5/2007
Authors: M Yarbrough, M Feinholz, S Flora, Terrance Houlihan, Bettye C Johnson, Yong S. Kim, Marilyn Yuen Murphy, Michael Ondrusek, D K Clark
Abstract: The solar normalized water-leaving spectral radiance is a basic ocean color remote-sensing parameter required for the vicarious calibration and bio-optical product development. Determination of normalized water-leaving spectral radiance using in-wat ...

23. Area Measurements of Apertures for Exo-Atmospheric Solar Irradiance for JPL
Published: 9/13/2007
Authors: Maritoni Abatayo Litorja, Bettye C Johnson, J B. Fowler
Abstract: A comparison of the area measurements of the limiting apertures used for total solar irradiance measurements in the Active Cavity Radiometer Irradiance Monitor II (ACRIM II) and Active Cavity Radiometer Irradiance Monitor III (ACRIM III) were conduct ...

24. Hyperspectral Image Projector for Advanced Sensor Characterization
Published: 12/4/2006
Authors: Steven W Brown, Joseph Paul Rice, Jorge Enrique Neira, Bettye C Johnson
Abstract: 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 ...

25. Spectrally Tunable Sources for Advanced Radiometric Applications
Series: Journal of Research (NIST JRES)
Published: 10/1/2006
Authors: Steven W Brown, Joseph Paul Rice, J D Jackson, Jorge Enrique Neira, Bettye C Johnson
Abstract: 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 standardize ...

26. Hyperspectral Image Projectors for Radiometric Applications
Published: 3/23/2006
Authors: Joseph Paul Rice, Steven W Brown, Bettye C Johnson, Jorge Enrique Neira
Abstract: 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 mi ...

27. Simple Spectral Stray Light Correction Method for Array Spectroradiometers
Published: 2/20/2006
Authors: Yuqin Zong, Steven W Brown, Bettye C Johnson, Keith R. Lykke, Yoshihiro Ohno
Abstract: 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 co ...

28. Bandwith and spectral stray light effects in the NASA GSFC Radiometric Calibration Facility primary transfer radiometer
Published: 1/1/2006
Authors: R A Barnes, Steven W Brown, James J. Butler, Jill Cooper, Bettye C Johnson, J E Marketon

29. Correction of Stray Light in Spectrographs: Implications for Remote Sensing
Published: 8/22/2005
Authors: Yuqin Zong, Steven W Brown, Bettye C Johnson, Keith R. Lykke, Yoshihiro Ohno
Abstract: 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 su ...

30. Radiometric validation of NASA's Ames Research Center's Sensor Calibration Laboratory
Published: 1/1/2005
Authors: R A Barnes, S F Biggar, Steven W Brown, James J. Butler, J Cooper, P Grant, P Hajek, E Hildum, Bettye C Johnson, E F Zalewski

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