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Author: bettye johnson

Displaying records 1 to 10 of 167 records.
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1. Validation of Spectral Radiance Assignments to Integrating Sphere Radiance Standards for the Advanced Baseline Imager
Published: 9/22/2014
Authors: Bettye C Johnson, Stephen E Maxwell, Eric L Shirley, Kim Slack, Gary Graham
Abstract: The Advanced Baseline Imager (ABI) is the next generation imaging sensor for NOAA‰s operational meteorological satellites in geostationary orbit. One pathway for traceability of the visible and near infrared radiometric response for ABI is to a 1.65 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916420

2. Optical Passive Sensor Calibration for Satellite Remote Sensing and the Legacy of NOAA and NIST Cooperation
Series: Journal of Research (NIST JRES)
Report Number: 119.008
Published: 6/26/2014
Authors: Raju VSNU Datla , Michael Weinreb, Joseph Paul Rice, Bettye C Johnson, Eric L Shirley, Changyong Cao
Abstract: This paper traces the cooperative effort of the scientists at the National Oceanic and Atmospheric Administration (NOAA) and the National Institute of Standards and Technology (NIST) for improving the calibration of operational satellite sensors ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914026

3. Results of aperture area comparisons for exo-atmospheric total solar irradiance measurements
Published: 11/13/2013
Authors: Bettye C Johnson, Maritoni Abatayo Litorja, Joel B. Fowler, Eric L Shirley, James J Butler, Robert A Barnes
Abstract: Exo-atmospheric solar irradiance measurements made by the solar irradiance community since 1978 incorporate limiting apertures with diameters measured by a number of metrology laboratories using a variety of techniques. Knowledge of the aperture are ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913537

4. Validation of the dissemination of spectral irradiance values using FEL lamps
Published: 9/27/2012
Authors: Bettye C Johnson, Gary D. Graham, Robert D. Saunders, Howard W Yoon, Eric L Shirley
Abstract: Scales of spectral irradiance are disseminated from NIST by assignment of values to FEL-type lamp standards for defined conditions. These lamp standards can be used for absolute calibration of irradiance radiometers, or more typically, be used in con ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911954

5. Stray light correction algorithm for multi-spectral hyperspectral spectrographs
Published: 6/1/2012
Authors: Michael Feinholz, Stephanie J Flora, Steven W Brown, Yuqin Zong, Keith R Lykke, Mark A. Yarbrough, Bettye C Johnson, D. K. Clark
Abstract: An algorithm is developed to correct a multi-channel fiber-coupled spectrograph for stray or scattered light within the system. The efficacy of the algorithm is evaluated based on a series of validation measurements of sources with different spectra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909987

6. The use of filtered photodetectors for radiance measurement
Series: Journal of Research (NIST JRES)
Published: 10/31/2010
Authors: Albert C Parr, Bettye C Johnson
Abstract: A methodology for using a calibrated filter radiometer to measure and monitor the spectral radiance of calibration sources is described. An example using a calibration sphere used by NIST for its remote sensing program is presented.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907775

7. An example crossover experiment for testing new vicarious calibration techniques for satellite ocean color radiometry
Published: 10/1/2010
Authors: Kenneth Voss, Scott McLean, Stephanie J Flora, Michael Feinholz, Mark A. Yarbrough, Charles Trees, Mike Twardowski, Dennis Clark, Marlon Lewis, Bettye C Johnson
Abstract: Vicarious calibration of ocean color satellites involves accurate surface measurements of water-leaving radiance to update and improve the system calibration of ocean color satellite sensors. An experiment was performed to compare a free-fall techn ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903646

8. Characterization of Two Spectrmeters in Support of the Landsat Data Continuity Mission
Published: 8/27/2010
Authors: Bettye C Johnson, Robert D. Saunders, Zhigang Li, Abra Fein, Lawrence Ong, Milton Hom, Robert Barnes, B L Markham
Abstract: The Landsat Data Continuity Mission (LDCM) project at the National Aeronautics and Space Administration (NASA)Goddard Space Flight Center (GSFC) is supervising the manufacture and calibration of the Operational Land Imager (OLI) satellite instrument ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906346

9. Best Practice Guidelines for Pre-Launch Characterization and Calibration of Instruments for Passive Optical Remote Sensing
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7637
Published: 11/1/2009
Authors: Raju Vsnu Datla, Joseph Paul Rice, Keith R Lykke, Bettye C Johnson, James J. Butler, Xiaoxiong Xiong
Abstract: The pre-launch characterization and calibration of remote sensing instruments should be planned and carried out in conjunction with their design and development to meet the mission requirements. In the case of infrared instruments, the onboard calibr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902518

10. Sources of Differences in On-Orbit Total Solar Irradiance Measurements
Series: Journal of Research (NIST JRES)
Published: 7/13/2009
Authors: James J. Butler, R Barnes, Bettye C Johnson, Joseph Paul Rice, Eric L Shirley
Abstract: There is a 5 W/m2 difference between current on-orbit Total Solar Irradiance (TSI) measurements. On 18-20 July 2005, a workshop was held at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland that focused on understan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841161



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