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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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Predictor aided human tracking performance with time delay control under flat surface, roll, pitch, and roll and pitch conditions
Time delay in signal transmission required by industrial control design
Effects of time delay in visual feedback loop of man-machine system
Compensatory tracking task to measure human operators time delay characteristics and tracking ability
Materials for acoustic and magnetic microwave delay lines, discussing thin film piezoelectric transducers and magnetoelastic mode of microwave propagation
Binary delay-lock tracking-loop performance for various RF implementations
Remote manipulation task performance as affected by transmission delay
Theory, mathematical model, and computer simulation of randomly time-variant channels applied in tapped delay line development
Interfacing ultrasonic delay lines in digital systems using integrated circuit logic
Heterodyne phase shifter with inductive delay line pickup providing stepless phase shift
Additives effect on ignition delay and pressure of hypergolic hydrazine-nitrogen tetroxide propellant systems.
Scientific data handling system using passive magnetostrictive multichannel delay line memory
Negative contrast effect of reward delay in differential conditioning in rats
It is shown that an adaptive system whose regressor is formed by tap delay-line (TDL) filtering of a multitone sinusoidal signal is representable as a parallel connection of a linear time-invariant (LTI) block and a linear time-varying (LTV) block.
It is shown that an adaptive system whose regressor is formed by tap delay-line (TDL) filtering of a multitone sinusoidal signal is representable as a parallel connection of a linear time-invariant (LTI) block and a linear time-varying (LTV) block.
Dual frequency (S/X band) very long baseline interferometry (VLBI) observations were used to test troposphere calibration by water vapor radiometers (WVRs). Comparison of the VLBI and WVR measurements show a statistical agreement (specifically, their structure functions agree) on time scales less than 700 seconds. On longer time scales, VLBI instrumental errors become important. The improvement in VLBI residual delays from WVR calibration was consistent with the measured level of tropospheric fluctuations.
Ground-based, equal-arm-length laser interferometers are being built to measure high-frequency astrophysical graviatational waves. Because of the arm-length equality, laser light experiences the same delay in each arm and thus phase or frequency noise from the laser itself precisely cancels at the photodetector.
We describe a novel programmable photonic true time delay device that has the properties of low loss, inherent two dimensionality with a packing density exceeding 25 lines/cm super 2, virtually infinite bandwidth, and is easy to manufacture.