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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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Checkout and data reduction procedures for acceptance test of sealed, absolute, gage, and differential strain gage pressure transducers
Input radio frequency circuit for switching type absolute temperature measuring radiometer for noise sources
Absolute stability analysis of attitude control systems for large launch vehicles
Piston manometer used as absolute standard for calibrating and intercomparing vacuum gages in 10 to 500 microtorr range
Absolute capacitance microcreep and dimensional stability measuring system
Absolute value type early-late gate bit synchronizer steady state phase noise performance evaluation by Fokker-Planck method
Boron and carbon hydrides and carbon deuteride molecular ions radiative lifetime measurements, computing absolute oscillator strengths
Nonlinear absolutely stable regulator design in parameter space, using computer simplex search
Franck-Condon factors, r-centroids and absolute band transition probabilities of NH, SiH, molecular sulfur and SO
Absolute measurement of laser frequencies in IR range, using extended harmonic heterodyne technique
Absolute production rates of He 3 and Ne 21 in average chondrites, determining radiation ages of stony meteorites aged less than two million years
Ca, Mg, B and Al prominent resonance transitions radiative lifetimes and absolute oscillator strengths
Exponential absolute stability of nonlinear discrete systems of Lure type, deriving modified frequency condition
Photoelectric polarization curve, reflectivity and absolute diameter of Vesta, comparing with Lyot curve
Solar K-line profile absolute intensity calibration from elements of fine structure on surface, determining brightness temperature
Individual K-line profiles from elements of fine structure on the surface of the sun are calibrated absolutely. The continuum calibrations of Labs and Neckel and of Houtgast and Namba are considered, and the average K-profile is scaled to that of White and Suemoto. The ranges of intensities across a high-resolution spectrogram are tabulated for various parts of the line profile. Although the spatially-averaged value for K3 of 4.2% of the continuum corresponds to a brightness temperature of 4155 deg K, minimum and maximum values were 3980 and 4360 K, respectively. Similarly, K2v ranges from 4200 to 4560 K, and K2r from 4180 to 4460 K in small elements about 1 arc sec across.
A study, made to calibrate the ultraviolet spectra of stars to within an absolute accuracy of 10%, is summarized. Data were taken by a 13 inch UVR telescope onboard several rocket flights. Calibrated and existing ground based data are in reasonable agreement. Calibrated results are presented in graphical form.
The essential features of the calibration procedure can be divided into three parts. First, the shape of the bandpass of each photometer was determined by measuring the transmissions of the individual optical components and also by measuring the response of the photometer as a whole. Secondly, each photometer was placed in the essentially-collimated synchrotron radiation bundle maintained at a constant intensity level, and the output signal was determined from about 100 points on the objective. Finally, two or three points on the objective were illuminated by synchrotron radiation at several different intensity levels covering the dynamic range of the photometers. The output signals were placed on an absolute basis by the electron counting technique described earlier.