Effects of filtering on statistics of rain-induced fade durations

Time series of rain attenuation on a slant path at 11.6 GHz are analysed with two digital filters to show how they affect the statistics of fade durations. It is found that their influence is strong for the usual process considered in literature and it is shown how to take care of such effects. It also discusses a definition of the process which is much less sensitive to filtering. The first process provides data to plan telecommunications satellites with a common onboard resource, and the latter is useful for the distinction between quality and reliability criteria.