Statistics – Computation
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984tdar.nasa...87d&link_type=abstract
In its The Telecommun. and Data Acquisition Rept. p 87-96 (SEE N84-25889 16-32)
Statistics
Computation
Data Acquisition, Deep Space Network, Digital Techniques, Ground Stations, High Speed, Signal Processing, Interfaces, Minicomputers, Radar Data, Real Time Operation, Vax-11/780 Computer
Scientific paper
A digital data acquisition system that meets the requirements of several users (initially the planetary radar program) is planned for general use at Deep Space Station 14 (DSS 14). The system, now partially complete, is controlled by VAX 11/780 computer that is programmed in high level languages. A DEC Data Controller is included for moderate-speed data acquisition, low speed data display, and for a digital interface to special user-provided devices. The high-speed data acquisition is performed in devices that are being designed and built at JPL. Analog IF signals are converted to a digitized 50 MHz real signal. This signal is filtered and mixed digitally to baseband after which its phase code (a PN sequence in the case of planetary radar) is removed. It may then be accumulated (or averaged) and fed into the VAX through an FPS 5210 array processor. Further data processing before entering the VAX is thus possible (computation and accumulation of the power spectra, for example). The system is to be located in the research and development pedestal at DSS 14 for easy access by researchers in radio astronomy as well as telemetry processing and antenna arraying.
Brokl S. S.
Deutsch Leslie J.
Jurgens Raymond F.
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