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Author: Allan Smith

Displaying records 1 to 10 of 12 records.
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1. Precise Measurement of Lunar Spectral Irradiance at Visible Wavelengths
Series: Journal of Research (NIST JRES)
Report Number: 118.020
Published: 11/12/2013
Authors: Keith R Lykke, John Taylor Woodward IV, Allan W. Smith
Abstract: We report a measurement of lunar spectral irradiance with an uncertainty below 1 % from 420 nm to 1000 nm. This measurement uncertainty meets the stability requirement for many climate data records derived from satellite images, including those f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913841

2. Lunar Spectral Irradiance and radiance (LUSI): new instrumentation to characterize the Moon as a space-based radiometric standard
Series: Journal of Research (NIST JRES)
Report Number: 117.011
Published: 7/17/2012
Authors: Allan W. Smith, Steven Ray Lorentz, Raju Vsnu Datla, Thomas C. Stone
Abstract: The need to understand and monitor climate change has led to proposed radiometric accuracy requirements for space-based remote-sensing instruments that are very stringent and currently beyond the reach of many Earth orbiting instruments. A major ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903135

3. Spectroradiometric Calibration of Telescopes using Laser Illumination of Flat Field Screens
Published: 7/15/2010
Authors: Steven W Brown, Claire Elizabeth Cramer, Keith R Lykke, Allan W. Smith, John Taylor Woodward IV, Peter Doherty, Emilio Falco, Christopher W Stubbs
Abstract: It is standard practice at many telescopes to take a series of flat field images prior to an observation run. Typically the flat field consists of a screen mounted inside the telescope dome that is uniformly illuminated with a broadband light source ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906058

4. Uncertainty Analysis of Remote Sensing Optical Sensor Data Guiding Principles to Achieve Metrological Consistency
Published: 2/20/2010
Authors: Raju Vsnu Datla, Ruediger Kessel, Allan W. Smith, Raghu N Kacker, D. B. Pollock
Abstract: Climate change monitoring requires long time series radiometric measurements using multiple optical sensors in multiple platforms covering the globe over decades. The problem of achieving traceability to SI units for these measurements is discussed. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890001

5. Hyperspectral Imager Characterization and Calibration
Published: 12/1/2009
Authors: John Taylor Woodward IV, Steven W Brown, Allan W. Smith, Keith R Lykke
Abstract: Current radiometric calibration standards, specifically blackbody and lamp-based optical radiation sources, produce spatially, spectrally, and temporally simple scenes. Hyperspectral imaging instruments, which in-practice view spatially, spectrally, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903023

6. Absolute Flux Calibration of Stars; Calibration of the Reference Telescope
Published: 6/2/2009
Authors: Allan W. Smith, John Taylor Woodward IV, Colleen Alana Jenkins, Steven W Brown, Keith R Lykke
Abstract: Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega with instruments calibrated using the Planckian radiance from a Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 3 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900900

7. 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

8. Low Background Temperature Calibration of Infrared Blackbodies
Published: 3/23/2006
Authors: Adriaan Carl Linus Carter, Raju Vsnu Datla, Timothy Michael Jung, Allan W. Smith, James A Fedchak
Abstract: The Low Background Infrared (LBIR) facility at the National Institute of Standards and Technology (NIST) has performed 10 calibrations of low-background blackbodies since 2001 when the calibration facility and calibration method for low-background bl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840979

9. Low-background temperature calibration of infrared blackbodies
Published: 1/1/2006
Authors: Adriaan Carl Linus Carter, Raju Vsnu Datla, J A Fedchak, Timothy Michael Jung, Allan W. Smith
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101419

10. Improved Broadband Blackbody Calibrations at NIST for Low-Background Infrared Applications
Published: 2/1/2003
Authors: Adriaan Carl Linus Carter, Timothy Michael Jung, Allan W. Smith, Steven Ray Lorentz, Raju Vsnu Datla
Abstract: The Low Background Infrared (LBIR) facility at The National Institute of Standards and Technology (NIST) has continued to develop its facilities and knowledge base to meet the needs of the infrared community. Improvements in refrigeration capability ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841632



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