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Author: keith lykke

Displaying records 101 to 110 of 111 records.
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101. 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

102. Characterization of UV-Induced Radiation Damage to Si-based Photodiodes
Published: Date unknown
Authors: Keith R Lykke, Ping-Shine Shaw, J L Dehmer, R Gupta
Abstract: We have made direct measurements of the internal quantum efficiency and the reflectivity of UV-damaged silicon photodiodes in the spectral range of 120 nm to 320 nm. The above qualities, coupled with absolute spectral responsivities, give unique inf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841252

103. Compact Anamorphic Imaging Spectrometer
Published: Date unknown
Authors: P Maciejewski, K Barnard, Rand Swanson, Michael Kehoe, C Smith, Thomas Moon, Robert R. Bousquet, Steven W Brown, Keith R Lykke
Abstract: Deployment of compact hyperspectral imaging sensors on small UAVs has the potential of providing a cost-effective solution for rapid-response target detection and cueing based on time-critical spectral information collected at low altitudes. To addre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841073

104. Development of a Monochromatic Uniform Source Facility for Calibration of Radiance and Irradiance Detectors from 0.2 um to 12 um
Published: Date unknown
Authors: Keith R Lykke, Ping-Shine Shaw, Leonard M Hanssen, George P Eppeldauer
Abstract: A radiometric source facility is being constructed with narrow-band, widely tunable lasers from {difference} 200nm to 12 um. The output will be highly uniform and monochromatic. This facility will be used to make a wide variety of radiometric measu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840289

105. Spectral Irradiance Responsivity Measurements Between 1mu m and 5 mu m
Published: Date unknown
Authors: George P Eppeldauer, Joseph Paul Rice, Jun Zhang, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841819

106. Spectral Irradiance and Radiance Responsivity Calibrations Using Uniform Sources (SIRCUS) Facility at NIST
Published: Date unknown
Authors: Steven W Brown, George P Eppeldauer, Joseph Paul Rice, Jun Zhang, Keith R Lykke
Abstract: Detectors have historically been calibrated for spectral power responsivity at the National Institute of Standards and Technology (NIST) using a lamp-monochromator system to tune the wavelength of the excitation source. Silicon detectors can be cali ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841840

107. System-Level Pre-Launch Calibration of Onboard Solar Diffusers
Published: Date unknown
Authors: R Barnes, Steven W Brown, Keith R Lykke, Gerald T Fraser, James J. Butler
Abstract: Onboard diffuse reflecting plaques are carried to orbit as radiometric reference standards for Earth-observing satellite instruments. For many instruments the reflectance properties of the plaque are characterized independent of the instrument, and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841129

108. Temperature Determination of the Ag-and Au-Freezing Points Using a Detector-Based Radiation Thermometer
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Maritoni Abatayo Litorja, Robert D. Saunders, Steven W Brown, George P Eppeldauer, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841855

109. Temperature Scales Using Radiation Thermometers Calibratied From Absolute Irradiance and Radiance Responsivity
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Robert D. Saunders, Bettye C Johnson, Steven W Brown, Keith R Lykke
Abstract: In the International Temperature Scale of 1990 (ITS-90), temperatures above the freezing temperature of silver are defined with radiation thermometers calibrated using spectral radiance ratios to one of the silver-, gold- or copper-freezing temperatu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841740

110. Thermodynamic Radiation Thermometry for the Next SI
Published: Date unknown
Authors: Howard W Yoon, Charles E Gibson, V B Khromchenko, George P Eppeldauer, Robert R. Bousquet, Steven W Brown, Keith R Lykke
Abstract: We describe the construction, the calibration and the use of the NIST Thermodynamic Radiation Thermometer (TRT) to measure the temperature of the gold-freezing temperature blackbody and a variable-temperature blackbody from 800 ?C to 2700 ?C. These ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841125



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