Abstract
First-Order Statistics Prediction for a Propagation Channel of Arbitrary Non-Geostationary Satellite Orbits
Highlights
Central to the design of a satellite system are the constellation and selected orbit which determine the elevation and azimuth angles at which a user shall receive a direct signal
The elevation and azimuth angle toward a particular satellite can remain the same for a fixed receiver, as in case of a geostationary Earth orbit, or change dramatically when considering for example a highly elliptical orbit. This has a strong influence on the corresponding satellite-to-Earth propagation channel as, based on user surroundings, the signal may be shadowed differently determined by the direction of the incoming signal
Considering azimuth-independent scenarios identified in the text as regular, such as a densely vegetated area, only one set of reference experimental data in a vast range of elevation angles at an arbitrary azimuth should be sufficient to predict received signal characteristics for arbitrary non-geostationary satellite orbits leading to less demanding experimental campaigns
Summary
Central to the design of a satellite system are the constellation and selected orbit which determine the elevation and azimuth angles at which a user shall receive a direct signal. Considering azimuth-independent scenarios identified in the text as regular, such as a densely vegetated area, only one set of reference experimental data in a vast range of elevation angles at an arbitrary azimuth should be sufficient to predict received signal characteristics for arbitrary non-geostationary satellite orbits leading to less demanding experimental campaigns Such a novel approach would follow [20], where a probability density function (PDF) of elevation angles between a user and a low Earth orbit satellite is utilized to obtain resulting rain attenuation time series. A series of measurements at 2.0 GHz at Stromovka Park in Prague, Czech Republic, were carried out in 2013 and 2014 Throughout these trials, a remote-controlled airship was utilized as a pseudo-satellite following pre-defined flight paths according to sub-satellite points of selected Galileo and Iridium satellites.
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