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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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Environmental, solid-state thermal, and mechanical properties of Thermo-Lag material for entry thermal protection of advanced manned spacecraft
Regenerative moisture removal system testing for spacecraft cabin gases under 14 day mission simulation
Vapor pressure and flow rate measuring apparatus for potassium vapor turbine
Efficiency evaluation of two-stage turbine with low ratio of blade to jet speed suitable for bleed-type high energy liquid rocket applications
Optical and calorimetric tests of nickel mirrors for use as power source for thermionic generators
Magnetic tape link optimization for split phase binary data recording
Thermal and space environment simulation testing of Gemini extravehicular space suit
Temperature data plots of Gemini Bravo series space suit tests
Experimental program for tests to identify primary electric propulsion system integration problems and solutions, emphasizing design and initial testing
Gain measurement of two element phased array aperture antenna during ATS-C tracking
Rocket engine tests using space storable propellants and various injector configurations
PCM telemetry bit synchronizer/signal conditioner, discussing bit acquisition, error and slippage rates
Transonic compressor rotors blade camberline shape optimization by various tip diffusion factor-ratio combinations
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A pseudonoise (PN) test set was built to provide a relatively easy means of accurately determining the end-to-end rms error introduced by a communication system when subjected to wideband data. It utilizes a filtered pseudorandom sequence generator as a wideband data source, providing a convenient means for digitally delaying the input reference signal for comparison with the distorted test communication system output. In addition to providing a means to measure the end-to-end rms error and the average delay of a communication system, the PN test set also provides a means to determine the tested system's impulse response and correlation function. The theory of PN testing is discussed in detail along with the most difficult aspects of implementation, the building of matched filter pairs. Both analytical and empirical results are reported which support the contentions that this is an accurate and practical way to acquire figures of merit for complete communication systems.
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The manual for the use of the computer program SYSTID under the Univac operating system is presented. The computer program is used in the simulation and evaluation of the space shuttle orbiter electric power supply. The models described in the handbook are those which were available in the original versions of SYSTID. The subjects discussed are: (1) program description, (2) input language, (3) node typing, (4) problem submission, and (5) basic and power system SYSTID libraries.