Large Area Crop Inventory Experiment (LACIE). Data Acquisition, Preprocessing and Transmission Subsystem (DAPTS) detailed procedures
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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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A long-range and long-life telemetry data-acquisition system for heart rate and multiple body temperatures from free-ranging animals
The system includes an implantable transmitter, external receiver-retransmitter collar, and a microprocessor-controlled demodulator. The size of the implant is suitable for animals with body weights of a few kilograms or more; further size reduction of the implant is possible. The ECG is sensed by electrodes designed for internal telemetry and to reduce movement artifacts. The R-wave characteristics are then specifically selected to trigger a short radio frequency pulse. Temperatures are sensed at desired locations by thermistors and then, based on a heartbeat counter, transmitted intermittently via pulse interval modulation. This modulation scheme includes first and last calibration intervals for a reference by ratios with the temperature intervals to achieve good accuracy even over long periods. Pulse duration and pulse sequencing are used to discriminate between heart rate and temperature pulses as well as RF interference.
Lund, G. F.↗
Recycling isoelectric focusing with computer controlled data acquisition system
Isoelectric focusing is a high-resolution technique for separating and purifying large peptides, proteins, and other biomolecules. The apparatus described in the present paper constitutes a new approach to fluid stabilization and increased throughput. Stabilization is achieved by flowing the process fluid uniformly through an array of closely spaced filter elements oriented parallel both to the electrodes and the direction of the flow. This seems to overcome the major difficulties of parabolic flow and electroosmosis at the walls, while limiting the convection to chamber compartments defined by adjacent spacers. Increased throughput is achieved by recirculating the process fluid through external heat exchange reservoirs, where the Joule heat is dissipated.
Egen, N. B.↗
Data acquisition control and buffer unit performance requirements
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Nance, S. C.↗
Data-acquisition and control system for severe environments
Report evaluates control system by measuring accuracy and performance of system subcomponents, including interface wiring unit, power controller, and tape recorder. Test parameters establish variety of severe operation environments. Text features test program descriptions, sample readouts, and results. Summary of custom solar system simulator is included.
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Application of data acquisition systems for on-line definition and control of wind tunnel shape
Improvements in wind tunnel design to reduce test and flight discrepancies are analyzed. Flexible wall streamlining, criteria for tunnel streamlining, and error assessment are discussed. It is concluded that the concept of self-streamlining wind tunnels is suited for on-line computer control.
Wolf, S. W. D.↗
The telecommunications and data acquisition report
Progress in the development and operations of the Deep Space Network is reported. Developments in Earth based radio technology as applied to geodynamics, astrophysics, and radio astronomy's use of the deep space stations for a radio search for extraterrestrial intelligence in the microwave region of the electromagnetic spectrum are reported.
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LACIE field measurements data acquisition summary report, 1975 - 1976 crop year
There are no author-identified significant results in this report.
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The telecommunications and data acquisition report
Progress in the development and operations of the Deep Space Network along with developments in Earth-based radio technology as applied to geodynamics, astrophysics, and the search for extraterrestrial intelligence are reported.
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Digital multiplexing of analog data in a microprocessor controlled data acquisition system
The purpose of the paper is to explore the ramifications of doing the multiplexing function in the digital domain and of using the microprocessor to replace the hardwired control logic which resides in the typical analog to digital converter. Two types of conversion (one working in parallel inputs, and one in sequential order) strategies are discussed where the microprocessor is in full control of the conversion. One advantage of using a digital multiplexor is that, contrary to an analog multiplexor, it does not degrade the fidelity of the conversion process.
Cliff, R. A.↗
Termination of GEOS-3 data acquisition, post launch report 3
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NASA to change tracking and data acquisition operations
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The telecommunications and data acquisition
Radio astronomy and radio interferometry at microwave frequencies are discussed. Other topics concerning the Deep Space Network include program planning, planetary and interplanetary mission support, tracking and ground based navigation, communications, and station control and system technology.
Renzetti, N. A.↗
The Telecommunications and Data Acquisition
Progress in the development and operations of the Deep Space Network is reported including developments in Earth based radio technology as applied to other research programs. These programs include application of radio interferometry at microwave frequencies to geodetic measurements and geodynamics, use of deep space stations individually and in pairs as an interferometer by radio astronomers for astrophysics research by direct observations of radio sources, and radio search for extraterrestrial intelligence in the microwave region of the electromagnetic spectrum.
Renzetti, N. A.↗
The telecommunications and data acquisition progress report 42-64
Progress in the development and operations of the Deep Space Network is reported. Developments in Earth-based radio technology as applied to geodynamics, astrophysics, and the radio search for extraterrestrial intelligence are included.
Renzetti, N. A.↗
The Telecommunications and Data Acquisition report
Progress in the development and operations of the Deep Space Network is reported including develoments in Earth-based radio technology as applied to other research programs. These programs are: geodynamics, astrophysics, and the radio search for extraterrestrial intelligence in the microwave region of the electromagnetic spectrum.
Renzetti, N. A.↗
The telecommunications and data acquisition report
Deep Space Network operations, engineering, and implementation are reported. Developments in Earth-based radiotechnology as applied to other research programs in the fields of Geodynamics, Astrophysics, and programs related to radio searchers (instrumentation and methods) in extraterrestrial areas in the microwave region of the electromagnetic spectrum are also presented.
Renzetti, N. A.↗
The telecommunications and data acquisition report
Progress in the development and operations of the Deep Space Network is reported. Developments in Earth-based radio technology as applied to other research programs are also reported. These programs include geodynamics, astrophysics, and radio searching for extraterrestrial intelligence in the microwave region of the electromagnetic spectrum.
Renzetti, N. A.↗