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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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Inspection system for bonded honeycomb assemblies is accurate, fast, and automated. The ultrasonic system consists of inner and outer transducer positioning assemblies with suitable motor controls, a centerless turntable assembly, water squirter assemblies, and an inspection program completely encoded on tape suitable for use on a high speed computer.
Voyager spacecraft trade-off design parameters in telecommunication subsystems and between telecommunication system and other systems - data encoder and data storage systems
Modified electronic voice encoder /Vocoder/ includes an independent analog mode of operation in addition to the conventional digital mode. The Vocoder is a bandwidth compression equipment that permits voice transmission over channels, having only a fraction of the bandwidth required for conventional telephone-quality speech transmission.
One-half rate convolutional encoding with sequential decoding for deep space probe telemetry links with application to Pioneer missions
Logarithmic compression of digitally telemetered data for constant maximum percentage error throughout encoded range
Simplified, high-speed decoder of encoded binary data received over a noisy channel is provided in a versatile apparatus that can accommodate more than one particular set of codes. The apparatus is applicable to satellite, lunar, and planetary data transmission.
Miniaturized, 16 mm high speed pulse camera takes spectral photometric photographs upon instantaneous command. The design includes a low-friction, low-inertia film transport, a very thin beryllium shutter driven by a low-inertia stepper motor for minimum actuation time after a pulse command, and a binary encoder.
Frequency selective fading, analog and digital communication, phase lock loop system, source encoding, bit timing, and other studies on suboptimal self-adaptive binary communication
Convolutional encoding-sequential decoding technique for coherent deep space telemetry link and near earth space missions
Variable redundancy tensor product codes, discussing encoder modes implementation for adaptive coding and feedback transmission
Solar flare measuring system using vidicon TV camera combined with analog computer and digital encoder to produce quantitative time history data
An ENCODE and DECODE facility, a subroutine added to a FORTRAN 4 library, allows alphanumeric data to be transfered to or from an area in memory rather than to or from external input/output devices. A buffer storage array allows the operations on the data prior to writing.
Adaptive compression system for predicting and encoding video data for transmission in noiseless channel
Mariner 1969 high rate telemetry system portions pertinent to combinatorial mathematicians, discussing coding and encoding
Convolutional encoding and sequential decoding of digital data for reliable transmission
Comprehensive pointing theory for 16 ft antenna including servo encoder readings
Slow scan TV systems for planetary exploration, discussing sampled vidicon operation, digital encoding, data storage, signal to noise ratio, future design trends, etc
Rate distortion function for class of sources, proving positive and negative sides of Shannon encoding theorem for noisy channels