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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Conical cavity-type absolute radiometer measures the intensity of radiant energy to an accuracy of one to two percent in a vacuum of ten to the minus fifth torr or lower. There is a uniform response over the ultraviolet, visible, and infrared range, and it requires no calibration or comparison with a radiation standard.
Slitless absolute spectral photometry method for atmospheric entry and astronomical radiation measurements
Absolute frequency measurements of 190 and 194 micron gas laser transitions
Mean absolute magnitude and space motions of classical cepheids of galactic population I
Dicke-type radiometers for absolute temperature measurements at microwave frequencies
Metal photocathodes as secondary standards for absolute intensity measurements in vacuum UV
Absolute frequency measurement and spectroscopy of gas laser transitions in far IR, analyzing Zeeman effect
Generation of series limit continua with aid of sliding sparks for absolute measurements in vacuum UV, observing bremsstrahlung
Radiometric technique for absolute temperature measurement of microwave noise sources under field conditions
Absolute frequency measurements on continuous wave hydrogen cyanide submillimeter laser lines
Absolute judgment of more than 32 categories with unidimensional visual stimulus
McLeod gage is used as the primary reference standard in a system used for absolute calibration of vacuum gages in the very low pressure range. The system involves steady-state flow of a gas through a cascade of differentially pumped chambers or stages connected by precisely defined orifices.
Comparison of absolute calculated and measured gamma and neutron doses in tungsten water- moderated critical assembly
Absolute optical flux observations of total moon eclipse on 18 October 1967
Absolute pressure switch design and fabrication, and temperature and vibration test data
Absolute photon flux measurement using thin film superconducting bolometer
Absolute stability notion extended to include parameter variations of linear part of system
Standard total-radiation absolute radiometer with improved accuracy for calibrating radiometers for simulated solar radiation measurement