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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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Transducer-mounting device allows measurement of transient pressure in a hostile environment. The device provides free passage areas and a controlled environment for the measuring instrument.
Measuring instrument analyzes mechanical vibrations in transducers at amplitudes in the range of a few to 100 angstroms. This instrument utilizes the Mossbauer effect, the phenomenon of the recoil-free emission and resonant absorption of nuclear gamma rays in solids.
Lattice column, made up of many individually collapsible sections connected in tandem, rapidly raises measuring instruments to a level appreciably above that where data is to be recorded and evaluated. The column may be collapsed by collapsing each section in sequence and is deployed by extending each section in sequence.
Breadboard and prototype models developed for solar constant measuring instrument
Optical measuring instrument flown on IMP satellite to monitor spacecraft contamination
Interplanetary field and particle instrument measurements of Mariner 4 mission
Matching measuring instruments to systems for minimum disturbance when instrument is connected
Interaction effects in matching measuring instrument to system so minimum disturbance is generated when instrument is connected
Solar constant and solar spectral irradiance measurements from high altitude research aircraft, discussing radiation measuring instruments
Surveyor 5 alpha particle backscattering instrument measurement, TV pictures of lunar surface elemental composition and magnetic and mechanical measurements
Three dimensional laser Doppler instrument measures both local mean and fluctuating gas velocity of air flow. Technique is used for measuring atmospheric wind velocity and turbulence. Under certain conditions liquid flows can be measured.
Modified version of Sievert's apparatus accurately calibrates low pressure measuring instruments. Metal-gas system is composed of hydrogen in two-phase equilibrium with erbium to obtain reproducible hydrogen pressures.
Parallel motion suspension device for measuring instruments
Instrument measures metabolic breathing rate and dynamics of human beings in atmospheres ranging from normal air to 100 percent oxygen at ambient pressures from 14.7 to 3.0 psia. Measurements are made at rest or performing tasks up to maximum physical capacity under either zero or normal gravity.
Radio astronomy studies including sensitive interferometers, digital correlators, and related measuring instruments also radar techniques for lunar topography
Development of method for improving signal to noise ratio and accuracy of Wheatstone bridge type radiation measuring instrument
Alpha and gamma radiation detectors and measuring instruments for semiconductor materials, process control, and devices
Measuring instrument for amorphous and polycrystalline materials resistivity and Seebeck coefficient as function of temperature and pressure