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The possibilities of measuring Extremely High Energy Cosmic Rays (EHECR) by radio detection of electromagnetic pulses radiated during the development of extensive air showers in the atmosphere are investigated. We present the demonstrative CODALEMA experiment, set up at Nançay Radio-Observatory (France). The radio-decametric array has been adapted to(More)
As a consequence of the development of telecommunications radio astronomers have to deal with an increasing number of unworkable observations polluted by man-made radio interferences. Thus, a lot of efforts are made to develop specific mitigation techniques. However, it appears that algorithm efficiency is related to the quality of the acquisitions. The(More)
In radio astronomy, the radio spectrum is used to detect weak emission from celestial sources. By spectral averaging, noise estimation is reduced and weak sources can be detected. However, more and more observations are polluted by man-made radio frequency interferences (RFI). The impact of these RFI on spectral measurement ranges from total saturation to(More)
A global array of 20 radio observatories was used to measure the three-dimensional position and velocity of the two meteorological balloons that were injected into the equatorial region of the Venus atmosphere near Venus midnight by the VEGA spacecraft on 11 and 15 June 1985. Initial analysis of only radial velocities indicates that each balloon was blown(More)
The decameter wave radio spectrum (~10-50 MHz) suffers a very high pollution by man-made interference. However, it is a range well-suited to the search for exoplanets and the study of planetary (especially Saturnian) lightning, provided that very high sensitivity (~1 Jansky) is available at high time resolution (0.1-1 second). Such conditions require a very(More)
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