Highlights ► Multipath time-variant ionospheric channel. ► Study of the slow fading variations through time of the ionospheric channel. ► Power-virtual height measurements of radio echoes reflected from the ionosphere. ► Evaluation of periods of stability for the estimation of the Coherent Integration Time.
Abstract A series of Power Virtual Height measurements (PVH) of radio echoes reflected from the ionosphere were acquired at a given frequency during the period 3–22 January 2008 with the purpose of studying the slow fading variations through time of the ionospheric channel. To obtain PVH data, an ionospheric vertical sounding system was suitably adapted to work at a single fixed frequency. PVH measurements were recorded between two routine ionospheric vertical soundings, providing a data type that enables evaluation of fading fluctuation through time. The time stability of the ionospheric layers is determined by analyzing the level of the received signal power within a chosen threshold. In this paper the fading behaviour and its characteristics are described, considering only temporal periodicity above 0.5s. In a further analysis a relation is demonstrated between the recorded fading and the time stability of the signal within a fixed interval of values.
Power variation analysis of echo signals from ionospheric reflectors
Advances in Space Research ; 51 , 5 ; 722-729
2012-09-21
8 pages
Article (Journal)
Electronic Resource
English
Power variation analysis of echo signals from ionospheric reflectors
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