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Author: bettye johnson
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Displaying records 151 to 160 of 167 records.
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151. Realization of New NIST Radiation Temperature Scales for the 1000 K to 3000 K Region, Using Absolute Radiometric Techniques
Published: 1/1/1992
Authors: Bettye C Johnson, Robert D. Saunders, V I Sapritsky, K D Mielenz
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104561

152. A Portable Integrating Sphere Source for Radiometric Calibrations From the Visible to the Short-Wave Infrared
Published: Date unknown
Authors: Steven W Brown, Bettye C Johnson
Abstract: A portable integrating sphere source has been developed by the National Institute of Standards and Technology (NIST) as part of a National Aeronautics and Space Administration s (NASA s) program to validate radiance scales of sources at Earth Observi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841351

153. A Simple Stray-light Correction Method for Array Spectroradiometers
Published: Date unknown
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

154. Absolute Flux Calibrations of Stars
Published: Date unknown
Authors: Gerald T Fraser, Steven W Brown, Howard W Yoon, Bettye C Johnson, Keith R Lykke
Abstract: Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega referenced against the Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 30 years that offer the potential to impro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841110

155. Advances in Radiometry for Ocean Color
Published: Date unknown
Authors: 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
Abstract: 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-{alpha} ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840030

156. Area Measurements of Apertures for Exo-Atmospheric Solar Irradiance for JPL
Published: Date unknown
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841123

157. Comparison of Area Measurements of Apertures for Exo-Atmospheric Solar Irradiance Between NIST and JPL
Published: Date unknown
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841122

158. Correction of Stray Light in Spectrographs: Implications for Remote Sensing
Published: Date unknown
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840972

159. Intercomparisions of Reflectance Measurements
Published: Date unknown
Authors: P Y. Barnes, Bettye C Johnson, James J. Butler, C J Bruegge, S F Biggar, P R Spyak, M M Pavlov, E A. Early
Abstract: A comparison of spectral diffuse reflectance between different national standards laboratories is being planned under the direction of the Comit* Consultatif de Photom*trie et Radiom*trie (CCPR). A similar comparison of bi-directional reflectance di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841286

160. Metrology for Remote Sensing Radiometry
Published: Date unknown
Authors: Bettye C Johnson, Steven W Brown, Joseph Paul Rice
Abstract: Metrology, the science of measurement, is discussed in terms of measurements of radiant flux and associated quantities. Radiometric measurements are naturally remote, that is, they are non-contact. A broad application is Earth science, as global meas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841789



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