You searched on: Author: Gerald Fraser
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1. A Comparison of MODTRAN5 Atmospheric Extinction Predictions with Narrowband Astronomical Flux Observations
Claire Elizabeth Cramer, John Taylor Woodward IV, Keith R. Lykke, Christopher W. Stubbs, Amali Vaz, Gerald T Fraser
Improving the precision of ground-based astronomical observations is an objective of both current (e.g. PanSTARRS1) and future (e.g. Dark Energy Survey and the Large Synoptic Survey Telescope) sky surveys. An important element of this effort is to de ...
2. Sensor Calibration and Characterization to Meet Climate Monitoring Requirements
Catherine C Cooksey, Gerald T Fraser, Howard W Yoon
The challenge of detecting small changes in the Earth's climate system over decadal and longer time scales places stringent requirements on environmental monitoring systems. Sensors must be well calibrated and maintain their calibration in challengin ...
3. A novel apparatus to measure reflected sunlight from the Moon
Claire Elizabeth Cramer, Gerald T Fraser, Keith R. Lykke, John Taylor Woodward IV, Alan W. Smith
We describe a new apparatus for measuring the spectral irradiance of the Moon at visible wavelengths. Our effort builds upon the United States Geological Survey‰s highly successful Robotic Lunar Observatory (ROLO), which determined a precise model fo ...
4. Ground-based observatory operations optimized and enhanced
by direct atmospheric measurements
John T McGraw, Peter C Zimmer, Azzam Mansour, Dean C Hines, Anthony B Hull, Lisa Rossmann, Daniel C Zirzow, Steven W Brown, Gerald T Fraser, Keith R. Lykke, Allan W. Smith, John Taylor Woodward IV, Christopher W Stubbs
Earth‰s atmosphere represents a turbulent, turbid refractive element for every ground-based telescope. We describe the significantly enhanced and optimized operation of observatories supported by the combination of a lidar and spectrophotometer that ...
5. Space-based photometric precision from ground-based telescopes
Peter C Zimmer, John T McGraw, Anthony B Hull, Daniel C Zirzow, Steven W Brown, Claire Elizabeth Cramer, Gerald T Fraser, Keith R. Lykke, Allan W. Smith, John Taylor Woodward IV, Christopher W Stubbs, Mark R Ackermann, Dean C Hines
Ground-based telescopes supported by lidar and spectrophotometric auxiliary instrumentation can attain space-based precision for all-sky photometry, with uncertainties dominated by fundamental photon counting statistics. Earth‟s atmosphere is a ...
6. Strategic Plan 2010
Gerald T Fraser
The Optical Technology Division s 2010 Strategic Plan defines the Mission, Vision, and Strategic Elements for the Division. The Strategic Elements consist of Optical Radiation Standards, Optical Measurement Methods, and Optical Measurement Services. ...
7. Measurement science for climate remote sensing
Gerald T Fraser, Steven W Brown, Raju Vsnu Datla, Bettye C Johnson, Keith R. Lykke, Joseph Paul Rice
The Earth s climate is very complex and highly variable, making it difficult to measure and model small changes that occur over decadal and longer time scales. The resulting uncertainties in measurement and modeling underlie the longterm debate over ...
8. Investigation of Collision-Induced Absorption in the Fundamental Bands of O^d2^ and N^d2^ at Elevated Temperatures
Y Baranov, Walter Joseph Lafferty, Gerald T Fraser
The NIST high-pressure multi-pass White absorption cell has been modified for use in high temperature studies. The temperature range of this cell is now -90o C to +90oC. Collision-induced absorption (CIA) of O2 and N2 has now been studied at temp ...
9. Once is Enough in Radiometric Calibrations
Journal of Research (NIST JRES)
Gerald T Fraser, Charles E Gibson, Howard W Yoon, Albert C Parr
The successful development of an Optical Technology Division quality system for optical radiation measurement services has provided the opportunity to reconsider the existing calibration procedures to improve quality and reduce costs. We have institu ...
10. The Microwave Spectrum of a Two-Top Peptide Mimetic: The N-Acetyl Alanine Methyl Ester Molecule
I Kleiner, J Demaison, David F Plusquellic, R D. Suenram, R J. Lavrich, Francis John Lovas, Gerald T Fraser, Vadim V Ilyushin
Rotational spectra of the ground torsional state of the N-acetyl alanine methyl ester molecule, a derivative of the alanine dipeptide biomimetic molecule, have been measured using a mini Fourier transform spectrometer between 10 and 20 GHz as part of ...