SEARCH · Search NASA
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Circuit configuration consisting of matched differential amplifier, temperature compensated zener diode, and low pinchoff-voltage field effect transistor provides accurate and stable current supply for temperature sensor devices.
Radiometric receiver system, which measures noise temperatures in degrees Kelvin, does not require cryogenic noise sources for routine operation. It eliminates radiometer calibration errors associated with RF attenuation measurements. Calibrated noise source is required only for laboratory adjustment and calibration.
Operational manual for Mark 1 model of laser gravimeter
Design and development of portable laser Doppler gravimeter model
Precision radiometric and spectrometric intensity measurements for calibration of space telescopes
Vacuum UV flash photolysis of carbon suboxide, noting pressure dependent reaction rates of carbon atoms with various gases
Solidification ages for Mare Tranquillitatis solidification ages for Mare Tranquillitatis
Hydrogen maser wall shift measurement, using flexible storage bulb for accuracy improvement
Secondary emission detector using linear signal to measure nonrepetitive microsecond ion bursts
Necessary and sufficient conditions on coefficients of real nonnegative polynomial pi/omega/, obtaining algebraic criterion for stability, optimality and passivity of dynamic linear systems
Explore the source record for details and available documents.
Thermospheric model based on Explorer 32 hydrogen ion density measurements including periodic variations and temperature factors due to local time, solar activity, and magnetic effects
Nonlinear networks interconnected by lossless transmission lines, deriving global asymptotic stability condition
Electron accelerator with broad stable beam for calibration of spectrometers and channel electron multipliers
SNAP 15A heat source gamma ray intensity measurements and identification of gamma ray producing isotopes, describing measurement apparatus
O I and II resonance transitions radiative lifetimes in vacuum UV, using beam foil method
Thermospheric hydrogen density and temporal variations from Explorer 32 measurements, discussing dependence on exospheric temperature
Enhanced Lamb dip width is 5 MHz and total depth is 10 percent of peak power. Present configuration is useful as frequency standard in near infrared. Technique extends to other lasers, for which low pressure narrow linewidth gain tubes can be constructed.