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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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Harmonic distortion analyzer effects rapid and accurate setup and calibration of magnetic tape instrumentation recorders. The analyzer is portable, requires no warmup period and need not be calibrated for normal usage. Average setup time with this analyzer is approximately 30 seconds per track.
Modified spectrometer system with a low-noise preamplifier reduces rate-dependent distortions at high counting rates, 25,000 counts per second. Pole-zero cancellation minimizes pulse undershoots due to multiple time constants, baseline restoration improves resolution and prevents spectral shifts.
Waveform distortion in maximum likelihood Darlington detector for M-ary pulse frequency modulation signals
Ionospheric distortion of minitrack signals in South America
Rate distortion function defined for class of sources, and proving of corresponding coding theorem
Theory of finite amplitude waves in fluid-filled elastic tubes, including wave distortion, shock wave propagation, and Korotkoff sounds
Saturn space vehicle FM-FM telemetry system distortion and delay for time varying input signal
Exhaust gas reingestion and inlet flow distortion in V/STOL lift engines, discussing static and wind tunnel testing using fighter configuration models
Linearly filtered angle modulated signals distortion and crosstalk analysis applied to filter input-output relation, noting satellite communication FM reception
Scattering correction method for convolution integral application in calculating particles angular distribution distortion by scattering medium
Distorted wave Magnus /DWM/ approximation for nonreactive molecular collisions, noting applicability in inelastic transition probabilities computation
Rate distortion function of Gaussian process with weighted square error criterion
Size perception illusion compared for extraneous objects in windows of Ames monocular distorted and rectangular rooms
RF harmonic and intermodulation distortion produced by glow discharge and high energy flame plasmas during electromagnetic wave propagation
Phase-locked-loop phase modulator has the capability of generating a 6.8MHz carrier at modulation indexes as high as 2.5, with a distortion of the demodulated signal of less than 5 percent. These characteristics are obtained without the use of multipliers.
Heat transfer and pressure distribution due to two-dimensional repetitive sine wave distortions on flat plate at Mach 20 in helium
Waveform distortion in FM/FM telemetry system
Wind tunnel tests of distortion dynamics in Mach three mixed compression inlet