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Displaying records 71 to 80 of 129 records.
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71. Principles of Optical Radiometry and Measurement Uncertainty
Published: 11/27/2014
Authors: Bettye C Johnson, Howard W Yoon, Joseph Paul Rice, Albert C Parr
Abstract: The fundamental concepts of optical radiometry are developed from basic principles, with detailed explanations for radiance, irradiance, and reflectance. Examples of radiometric standards, in particular radiometers and reference sources are given, an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915699

72. Radiometer standard for absolute responsivity calibrations from 950 nm to 1650 nm with 0.05% (k = 2) uncertainty
Published: 6/2/2009
Authors: George P Eppeldauer, Howard W Yoon, Yuqin Zong, Thomas C Larason, Allan W. Smith, M. Racz
Abstract: A sphere-input transfer-standard detector has been developed to calibrate detectors and radiometers for absolute spectral power, irradiance, and radiance responsivity in the near-IR range with uncertainties similar to those of silicon trap-detector c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900973

73. Radiometric Calibration History of MOBY/NIST Single Channel Dual Mode Radiometers
Published: 10/1/2000
Authors: Bettye C Johnson, Steven W Brown, Howard W Yoon
Abstract: 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 a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841507

74. Radiometric Calibration History of Visible and Near Infrared Portable Radiometers
Published: 1/1/2000
Authors: Bettye C Johnson, Steven W Brown, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103898

75. Radiometric Calibration History of Visible and Near-Infrared Portable Radiometers
Published: 9/1/2000
Authors: Bettye C Johnson, Steven W Brown, Howard W Yoon
Abstract: 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- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841411

76. Radiometric Characterization of Field Radiometers in Support of the 1997 Lunar Lake, Nevada, Experiment to Determine Surface Reflectance and Top-of-Atmosphere Radiance
Published: 9/1/2001
Authors: Steven W Brown, Bettye C Johnson, Howard W Yoon, James J. Butler, R Barnes, S F Biggar, P R Spyak, Kurtis J Thome, E F Zalewski, M Helmlinger, C J Bruegge, S Schiller, G Fedosejevs, R Gauthier, S Tsuchida, S Machida
Abstract: A continuing series of field campaigns to Lunar Lake, Nevada, has been established for the development of ground-truth measurement protocols and assessment of measurement uncertainties for the ground-based calibration of on-orbit satellite sensors. I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841334

77. Radiometric Measurement Comparisons Using Transfer Radiometers in Support of the Calibration of NASA's Earth Observing System (EOS) Sensors
Published: 9/1/1999
Authors: James J. Butler, Bettye C Johnson, Steven W Brown, Howard W Yoon, R Barnes, B L Markham, S F Biggar, E F Zalewski, P R Spyak, J W Cooper, F Sakuma
Abstract: EOS satellite instruments operating in the visible through the shortwave infrared wavelength regions (from 0.4 um to 2.5 um) are calibrated prior to flight for radiance using integrating spheres at a number of instrument builder facilities. The trac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841386

78. Radiometric Measurement Comparisons Using Transfer Radiometers in Support of the Calibration of NASA's Earth Observing System (EOS) Sensors, ed. by P.N. Slater
Published: 1/1/1999
Authors: James J. Butler, B L Markham, Bettye C Johnson, Steven W Brown, Howard W Yoon, R A Barnes, S F Biggar, E F Zalewski, P R Spyak, F Sakuma, Jill Cooper
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104352

79. Realization of the National Institute of Standards and Technology Detector-Based Spectral Irradiance Scale
Published: 10/1/2002
Authors: Howard W Yoon, Charles E Gibson, P Y. Barnes
Abstract: A detector-based spectral irradiance scale has been realized at the National Institute of Standards and Technology. Unlike the previousNIST spectral irradiance scales, the new scale is generated using filter radiometers calibrated for absolute spect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841604

80. SP250 Spectral Irradiance Calibrations
Series: Special Publication (NIST SP)
Report Number: 250-89
Published: 7/25/2011
Authors: Howard W Yoon, Charles E Gibson
Abstract: This document describes the process of the realization, the maintenance and the dissemination of the spectral irradiance scale and its accompanying uncertainties at the National Institute of Standards and Technology. It describes the measurement pro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907923



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