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Search Publications by: B. Carol Johnson ()

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Displaying 226 - 250 of 358

The Kelvin and Temperature Measurements

January 1, 2001
Author(s)
Billy W. Mangum, G T. Furukawa, Kenneth G. Kreider, Christopher W. Meyer, Dean C. Ripple, Gregory F. Strouse, Weston L. Tew, Robert D. Saunders, Bettye C. Johnson, Howard W. Yoon, Michael R. Moldover, Charles E. Gibson
The International Temperature Scale of 1990 (ITS90) is defined from 0.65 K upwards to the highest temperature measurable by spectral radiation thermometry, the radiation thermometry being based on the Planck radiation law. Part I of this paper describes

The Kelvin and Temperature Measurements

January 1, 2001
Author(s)
B W. Mangum, G T. Furukawa, K G. Kreider, C W. Meyer, D C. Ripple, G F. Strouse, L Tew, M R. Moldover, B. Carol Johnson, Howard Yoon, Charles E. Gibson, Robert D. Saunders

Remote Sensing Support at NIST

October 25, 2000
Author(s)
Bettye C. Johnson
This presentation to the Committee on Earth Observation Satellites Working Group on Calibration and Validation 17th Plenary Meeting covers radiometry and remote sensing; remote sensing programs in the Optical Technology Division; specral radiance from NIST

Radiometric Calibration History of MOBY/NIST Single Channel Dual Mode Radiometers

October 1, 2000
Author(s)
Bettye C. Johnson, Steven W. Brown, Howard W. Yoon
In 1996, the National Institute of Standards and Technology (NIST), with the support of the National Atmospheric and Oceanic Administration (NOAA), designed and built two single channel, dual mode radiometers. The radiometers are used to assess the

Radiometric Characterization and Calibration of the Marine Optical System (MOS) for the Marine Optical Buoy (MOBY) Project

October 1, 2000
Author(s)
C Habauzit, Steven W. Brown, Keith R. Lykke, B. Carol Johnson, M Yarbrough, M Feinholz, D K. Clark
The scientific objective of the Marine Optical Buoy (MOBY) project is to measure the downwelling spectral irradiance, E d, and the upwelling spectral radiance, L u, at various depths in the ocean. From these measurements, other quantities can be derived

Radiometric Calibration History of Visible and Near-Infrared Portable Radiometers

September 1, 2000
Author(s)
Bettye C. Johnson, Steven W. Brown, Howard W. Yoon
The National Institute of Standards and Technology (NIST), with the support of the National Aeronautics and Space Administration (NASA), has built several transfer radiometers that are used in radiometric measurement comparisons to validate spectral

Bidirectional Reflectance Round-Robin in Support of the Earth Observing System Program

August 1, 2000
Author(s)
E A. Early, P Y. Barnes, Bettye C. Johnson, James J. Butler, C J. Bruegge, S F. Biggar, P R. Spyak, M M. Pavlov
Laboratory measurements of the bidirectional reflectance distribution function (BRDF) of diffuse reflectors are required to supportcalibration in the Earth Observing System (EOS) program of the National Aeronautics and Space Administration. To assess the

A Comparison of ITS-90, Above the Silver Point, as Realised by NIST and NPL

January 1, 2000
Author(s)
Graham Machin, Charles E. Gibson, B. Carol Johnson, Howard Yoon
A comparison of the radiance temperature scales between 1000 C and 2700 C has been performed between the National Physical Laboratory (NPL) and the National Institute of Standards and Technology (NIST). Two transfer radiation thermometers, of identical