Radio interference in the near-earth environment

Astronomy and Astrophysics – Astronomy

Scientific paper

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Earth Orbital Environments, Interference Immunity, Radio Frequency Interference, Resonant Frequencies, Data Bases, Interferometry, Low Frequencies, Noise Generators, Radio Astronomy

Scientific paper

Natural and man-made radio frequency interference (RFI) are potentially serious obstacles to the successful operation of an array of spacecraft used for low frequency (1 to 30 MHz) radio interferometry in the near-earth environment. Several satellites and planetary probes have carried radio astronomy experiments, and the moderate data base that they provide are examined to help understand the near-earth RFI environment. The general conclusion is that the region of space within 100 earth-radii of the earth is a hostile environment for any radio astronomy experiment. If a low frequency array in earth orbit is to yield useful astronomical results, severe interference problems must be anticipated and overcome. A number of recommendations are made to further examine the feasibility of such an array.

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