Technique to determine location of radio sources from measurements taken on spinning spacecraft

Details Technique to determine location of radio sources from measurements taken on spinning spacecraft Technique to determine location of radio sources from measurements taken on spinning spacecraft

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...8016260f&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Data Acquisition, Explorer 43 Satellite, Position (Location), Radio Sources (Astronomy), Triangulation, Computerized Simulation, Frequency Modulation, Jupiter (Planet), Low Frequencies, Rotating Bodies, Saturn (Planet), Solar Flares

Scientific paper

The procedure developed to extract average source direction and average source size from spin-modulated radio astronomy data measured on the IMP-6 spacecraft is described. Because all measurements are used, rather than just finding maxima or minima in the data, the method is very sensitive, even in the presence of large amounts of noise. The technique is applicable to all experiments with directivity characteristics. It is suitable for onboard processing on satellites to reduce the data flow to Earth. The application to spin-modulated nonpolarized radio astronomy data is made and includes the effects of noise, background, and second source interference. The analysis was tested with computer simulated data and the results agree with analytic predictions. Applications of this method with IMP-6 radio data have led to: (1) determination of source positions of traveling solar radio bursts at large distances from the Sun; (2) mapping of magnetospheric radio emissions by radio triangulation; and (3) detection of low frequency radio emissions from Jupiter and Saturn.

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