ABSTRACT
The assessment of the availability and the optimization of the control loop require the use of space–time-correlated attenuation time series over the various sites. The performance assessment of those disposals should be made considering space–time-correlated link budgets at the scale of satellite coverage to optimize the areas in which the additional power should be focused. To perform the space–time link budgets, space–time-correlated propagation data are needed. As there are no data that can be used directly to simulate space–time-correlated link budgets, the use of space–time tropospheric propagation model is required. Different techniques have been used to generate space–time-correlated inputs: the transformation of a stationary Gaussian random field, the simulation of fractal fields, or the use of a spatially correlated time series. The use of space–time-correlated propagation impairment fields is of prime importance for the optimization of radio frequency systems using an adaptive fade countermeasure to cope with atmospheric attenuation.
