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Author: bettye johnson
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Displaying records 11 to 20 of 162 records.
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11. Absolute Flux Calibrations of Stars
Published: Date unknown
Authors: Gerald T Fraser, Steven W Brown, Howard W Yoon, Bettye C Johnson, Keith R Lykke
Abstract: Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega referenced against the Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 30 years that offer the potential to impro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841110

12. Advances in Radiometry for Ocean Color
Published: 11/10/2003
Authors: Steven W Brown, D K Clark, Bettye C Johnson, Howard W Yoon, Keith R Lykke, S Flora, M Feinholz, N Souaidia, C Pietras, Thomas C Stone, M Yarbrough, Y S Kim, R Barnes, J Mueller
Abstract: Organic materials in the oceans have spectral signatures based on their light-scattering properties. These optical properties are related to bio-physical and bio-chemical data products, such as the concentration of phytoplankton chlorophyll-{alpha} ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840030

13. 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

14. Area Measurements of Apertures for Exo-Atmospheric Solar Irradiance for JPL
Published: Date unknown
Authors: Maritoni Abatayo Litorja, Bettye C Johnson, J B Fowler
Abstract: A comparison of the area measurements of the limiting apertures used for total solar irradiance measurements in the Active Cavity Radiometer Irradiance Monitor II (ACRIM II) and Active Cavity Radiometer Irradiance Monitor III (ACRIM III) were conduct ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841123

15. Assessment of the Accuracy of the MOBY Spectral Radiance Calibration Sources Using the SXR and the VXR
Published: 10/1/2000
Authors: Bettye C Johnson, Howard W Yoon, M Feinholz, D K Clark
Abstract: The Marine Optical Buoy (MOBY) and its related optical system the Marine Optical Sensor (MOS) consist of dual CCD-based spectrographs. MOBY, MOS, and other instruments operated by the MOBY team are used to provide in situ measurements of water-leavi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841511

16. Bandwith and spectral stray light effects in the NASA GSFC Radiometric Calibration Facility primary transfer radiometer
Published: 1/1/2006
Authors: R A Barnes, Steven W Brown, James J. Butler, Jill Cooper, Bettye C Johnson, J E Marketon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104314

17. 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

18. Bidirectional Reflectance Round-Robin in Support of the Earth Observing System Program
Published: 8/1/2000
Authors: E A. Early, P Y. Barnes, Bettye C Johnson, James J. Butler, C J Bruegge, S F Biggar, P R Spyak, M M Pavlov
Abstract: 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 asses ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841342

19. Bidirectional reflectance round-robin in support of the Earth Observing System program
Published: 1/1/2000
Authors: E A. Early, P Y. Barnes, Bettye C Johnson, James J. Butler, C J Bruegge, S F Biggar, P R Spyak, M M Pavlov
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104418

20. Calibration and Characterization of Trap Detector Filter Radiometers
Published: 11/1/2003
Authors: David W Allen, George P Eppeldauer, Steven W Brown, E A. Early, Bettye C Johnson, Keith R Lykke
Abstract: We describe the development of a mechanically simple, radiometrically stable transfer radiometer designed for both radiance and irradiance measurements. The filter radiometer consists of a six-element Si trap detector, a temperature stabilized filter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841781



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