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Author: bettye johnson

Displaying records 11 to 20 of 166 records.
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11. Downwelling Surface Spectral Irradiance Measurements with the Marine Optical BuoY
Published: 12/31/2008
Authors: Bettye C Johnson, M Feinholz, S Flora, M Yarbrough, Terrance Houlihan, D Peters, Dennis Clark
Abstract: The Marine Optical BuoY (MOBY), off the coast of Lanai, Hawaii, has made in situ, in-water up-welling spectral radiance and downwelling surface spectral irradiance measurements since July 1997. The MOBY observatory concept was developed and implemen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842591

12. The Marine Optical BuoY (MOBY) Radiometric Calibration and Uncertainty Budget for Ocean Color Satellite Sensor Vicarious Calibration
Published: 12/31/2008
Authors: M Feinholz, Bettye C Johnson, Steven W Brown, S Flora, M Yarbrough, Terrance Houlihan, D Peters, Yong S. Kim, J Mueller, 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 the U. S. satellite ocean color sensors ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842574

13. Calibration of a Radiance Standard for the NPP/OMPS Instrument
Published: 10/9/2008
Authors: Bettye C Johnson, James J. Butler, Scott J. Janz, Robert D. Saunders, John W. Cooper, Matthew G. Kowalewski, R Barnes
Abstract: In June 2007, a spherical integrating source was calibrated in the National Aeronautics and Space Administration(NASA) Goddard Space Flight Center‰s (GSFC) Calibration Facility as part of the prelaunch characterization program for the NPOESS Pre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842573

14. Measurement science for climate remote sensing
Published: 8/20/2008
Authors: Gerald T Fraser, Steven W Brown, Raju Vsnu Datla, Bettye C Johnson, Keith R Lykke, Joseph Paul Rice
Abstract: The Earth s climate is very complex and highly variable, making it difficult to measure and model small changes that occur over decadal and longer time scales. The resulting uncertainties in measurement and modeling underlie the longterm debate over ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842531

15. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841136

16. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841114

17. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841043

18. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841002

19. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840986

20. A Simple 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840968



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