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You searched on: Author: bettye johnson

Displaying records 111 to 120 of 158 records.
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111. Short-Term Stability Measurements of a Germanium Plotodiode Radiometer
Published: 10/1/1998
Authors: G Andor, Bettye C Johnson
Abstract: This paper describes a general stability measurement method for the short term stability, or repeatability, for radiometers using fixed-point blackbodies [BBs] as radiation sources. A germanium photodiode was used for the detector in the radiometer. ...

112. The 1996 North American Interagency Intercomparison of Ultraviolet Monitoring Spectroradiometers
Series: Journal of Research (NIST JRES)
Published: 9/1/1998
Authors: E A Thompson, Bettye C Johnson, P Disterhoft, D Wardle, E Wu, J Ehramjian, J Tusson, T Mestechkina, M Beaubian, J Gibson, D Hayes, J DeLuisi, E A. Early, W Mou
Abstract: Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. To assess the ability of spectr ...

113. Radiometric and Engineering Performance of the SeaWiFS Quality Monitor (SQM): A Portable Light Source for Field Radiometers
Published: 8/1/1998
Authors: Bettye C Johnson, Ping-Shine Shaw, S B. Hooker, D C Lynch

114. The NIST EOS Thermal-Infrared Transfer Radiometer
Published: 8/1/1998
Authors: Joseph Paul Rice, Bettye C Johnson
Abstract: A portable thermal infrared transfer radiometer (TXR) has been developed for use in comparisons and scale verifications of sources used to calibrate thermal- infrared (TIR) channels of the National Aeronautics and Space Administration's (NASA's) Eart ...

115. A 400 nm to 2500 nm Absolute Spectral Radiance Comparison using Filter Radiometers
Published: 1/1/1998
Authors: Howard W Yoon, Bettye C Johnson, D Kelch, S F Biggar, P R Spyak

116. Description of a portable spectroradiometer to validate EOS radiance scales in the shortwave infrared
Published: 1/1/1998
Authors: W W Brown, Bettye C Johnson, W Yoon h

117. Initial Results of the Bidirectional Reflectance Characterization Round-Robin in Support of EOS AM-1
Published: 1/1/1998
Authors: Bettye C Johnson, Thomas R. O'Brian, P Y. Barnes, E A. Early, James J. Butler, C J Bruegge, S F Biggar, P R Spyak, M M Pavlov

118. Radiometric Traceability for Fundamental Measurements: Estimation and Evaluation of Combined Standard Uncertainties
Published: 1/1/1998
Authors: Benjamin K Tsai, Bettye C Johnson

119. Short Term Stability Measurements of a Germanium Photodiode Radiometer
Published: 1/1/1998
Authors: G Andor, Bettye C Johnson

120. The New Cryogenic Vacuum Chamber and Blackbody Source for Infrared Calibrations at NIST's FARCAL Facility
Published: 1/1/1998
Authors: J B Fowler, Bettye C Johnson, Joseph Paul Rice, Steven Ray Lorentz
Abstract: The Facility for Advanced Radiometric Calibrations [FARCAL] at the National Institute of Standards and Technology [NIST] in Gaithersburg, MD currently comprises the Medium Background Infrared [MBIR] facility and the Training for Calibration Expertise ...

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