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Author: steven brown

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151. Spectral Matching With an LED-Based Spectrally Tunable Light Source
Published: Date unknown
Authors: Irena Fryc, Steven W Brown, Yoshihiro Ohno
Abstract: A spectrally tunable light source using a large number of LEDs and an integrating sphere has been designed and constructed at the National Institute of Standards and Technology (NIST). The source is designed to have a capability of producing any visi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840970

152. System-Level Pre-Launch Calibration of Onboard Solar Diffusers
Published: Date unknown
Authors: R Barnes, Steven W Brown, Keith R Lykke, Gerald T Fraser, James J. Butler
Abstract: Onboard diffuse reflecting plaques are carried to orbit as radiometric reference standards for Earth-observing satellite instruments. For many instruments the reflectance properties of the plaque are characterized independent of the instrument, and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841129

153. Temperature Determination of the Ag-and Au-Freezing Points Using a Detector-Based Radiation Thermometer
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Maritoni Abatayo Litorja, Robert D. Saunders, Steven W Brown, George P Eppeldauer, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841855

154. Temperature Scales Using Radiation Thermometers Calibratied From Absolute Irradiance and Radiance Responsivity
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Robert D. Saunders, Bettye C Johnson, Steven W Brown, Keith R Lykke
Abstract: In the International Temperature Scale of 1990 (ITS-90), temperatures above the freezing temperature of silver are defined with radiation thermometers calibrated using spectral radiance ratios to one of the silver-, gold- or copper-freezing temperatu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841740

155. The Establishment and Verification of Traceability for Remote Sensing Radiometry, With an Eye Towards Intercomparison of Results
Published: Date unknown
Authors: Bettye C Johnson, Joseph Paul Rice, Steven W Brown
Abstract: Establishment of traceability is necessary for placing results and estimates of their uncertainty on an absolute scale. There are a number of factors that must be considered when comparing independent results during missions that cannot be neglected ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841869

156. Thermodynamic Radiation Thermometry for the Next SI
Published: Date unknown
Authors: Howard W Yoon, Charles E Gibson, V B Khromchenko, George P Eppeldauer, Robert R. Bousquet, Steven W Brown, Keith R Lykke
Abstract: We describe the construction, the calibration and the use of the NIST Thermodynamic Radiation Thermometer (TRT) to measure the temperature of the gold-freezing temperature blackbody and a variable-temperature blackbody from 800 ?C to 2700 ?C. These ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841125

157. Thermodynamic-Temperature Determinations of the Ag and Au Freezing Temperatures Using a Detector-Based Radiation Thermometer
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Maritoni Abatayo Litorja, Robert D. Saunders, Steven W Brown, George P Eppeldauer, Keith R Lykke
Abstract: We describe the development of a radiation thermometer calibrated for spectral radiance responsivity using cryogenic, electrical-substitution radiometry to determine the thermodynamic temperatures of the Ag- and Au-freezing temperatures. The absolut ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840978

158. Validation of Radiometric Standards for the Laboratory Calibration of Reflected-Solar Earth Observing Satellite Instruments
Published: Date unknown
Authors: James J. Butler, Bettye C Johnson, Joseph Paul Rice, Steven W Brown, R Barnes
Abstract: Historically, the traceability of the laboratory calibration of Earth-observing satellite instruments to a primary radiometric reference scale (SI units) is the responsibility of each instrument builder. For the NASA Earth Observing System (EOS), a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841128