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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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Effects contributed by tape recorders and by wow and flutter of magnetic tape on accuracy of telemetry system
Error correcting codes and data compression techniques for PCM adaptive telemetry systems - abstracts
Mechanical design, and environmental and functional testing of advanced telemetry system flight package with adaptive capability
Thin film triodes, magnetic permeability films, metal base transistor devices, inductors, dielectrics, and high frequency substrates for communications and telemetry system
Thin cadmium-telluride semiconducting films for personal communications and telemetry system
Voice operated switching circuit for thin film personal communications and telemetry system
Application of electronic technology to design and development of integrated circuit, telemetry system for biomedicine
The design, principles of operation, and performance of an implantable miniaturized (48 cu cm in volume) multiplex telemetry system for simultaneous measurement of up to eight physiological parameters (including cardiovascular data) are described. Integrated circuits are used to reduce the size, complexity, and cost of fabrication. Power consumption is reduced using recently developed complementary MOS devices. PWM technique is selected as it is relatively easy to implement, lends itself to ICs, and provides an accurate means of transmitting data. The system is totally implantable within the chest of a test animal, with no wire penetrating through the skin. It is shown that the described system permits repeated measurement of the physiological effects of a variety of interventions in awake unanesthetized animals.
Goddard Space Flight Center developed satellite telemetry processing technology to meet NASA's sophisticated processing requirements. The Microelectronic Systems Branch, a 'company' within Goddard, provided NASA with the telemetry data systems from 1985 to 1994. TSI/Telsys, Inc. was then founded to commercialize the systems and began operations on October 1, 1995. The system aids the remote sensing industry by providing affordable and quick access to data collected from space.
Assembly and development of radio frequency portions of transmitter and receiver in thin film personal communications and telemetry system
Breadboard data compressor for advanced vehicle borne pulse code modulated telemetry system with adaptive capability
Transmitter audio amplifier module, low pass filter module, summing network modules, and operational amplifier for thin film personal communications and telemetry system
NASA Marshall Space Flight Center will launch the Propulsive Small Expendable Deployer System (ProSEDS) space experiment in late 2000. ProSEDS will demonstrate the use of an electrodynamic tether propulsion system and will utilize a conducting wire tether to generate limited spacecraft power. This paper will provide an overview of the ProSEDS mission and will discuss the design, development and test of the spacecraft telemetry system which utilizes a custom designed GPS subsystem to determine spacecraft position relative to ground station location and to control transmitter on/off cycling based on spacecraft state vector and ground station visibility.
Since the beginning of NASA, there has been one way to do business. To procedure flight hardware you did things a certain way, to monitor contracts you did things a certain way and to support tests you did things a certain way. When the Delta Clipper Experimental (DC-X) space flight test vehicle was being upgraded (to the DC-XA, later called the Clipper Graham), the opportunity to change the way NASA did business presented itself The development of a flight test telemetry system (FTTS) for the Clipper Graham presented the perfect opportunity to change the way NASA did business. This paper will discuss the differences from the old way to the new way of doing business during the development of the FTTS from the conceptual stage thru the flight stages. The major focus will be the pulse code modulation system of the FTTS. Topics that will be discussed are working with procurement, working with contractors and subcontractors, supporting ground and flight testing and lessons learned.
A system to provide wind data which can be used for wind-weighting sounding rockets is described. The system uses an automatic tracking telemetry antenna and ranging system together with an inexpensive airborne transponder-type radiosonde.
Remote modules for spacecraft analog/digital telemetry distributing multiplexer input gates
NASA Goddard Space Flight Center (GSFC) designs, builds, manages, and operates science and applications spacecraft in near-earth orbit, and provides data capture, data processing, and flight control services for these spacecraft. In addition, GSFC has the responsibility of providing space-ground and ground-ground communications for near-earth orbiting spacecraft, including those of the manned spaceflight programs. The goal of reducing both the developmental and operating costs of the end-to-end information system has led the GSFC to support and participate in the standardization activities of the Consultative Committee for Space Data Systems (CCSDS), including those for packet telemetry. The environment in which such systems function is described, and the GSFC experience with CCSDS packet telemetry in the context of the Gamma-Ray Observatory project is discussed.
PCM telemetry unit for Nimbus B spacecraft noting applications and performance