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Ann. Geophys., 22, 1687-1689, 2004
www.ann-geophys.net/22/1687/2004/
© European Geosciences Union 2004
Time resolution of cosmic noise observations with acorrelation experiment
E. Nielsen1, F. Honary2, and M. Grill2
1Max Planck Institute for Aeronomy, 37191 Katlenburg-Lindau, Germany
2Communications Research center, Faculty of Applied Sciences, Lancaster University, Lancaster, UK
Abstract. A radio wave correlation experiment using a Mills Cross technique can be used to
observe the cosmic noise intensity from the ground for the purpose of determining the
absorption in the ionosphere. To ensure a time resolution of 10 to 20s of the
absorption observations, it is necessary that the autocorrelation function of the signal
received within a wanted spatial resolution and in a given receiver is >8% of the total
signal amplitude incident on that receiver.
Key words. Radio Science (Instruments and techniques; Interferometry;
Ionospheric physics)
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