Measurements of the land mobile and nomadic satellite channels at 2.2 GHz and 3.8 GHz

Seasonal Variations of Polarization Diversity Gain in a Vegetated Area considering High Elevation Angles and a Nomadic User

“…Thus, experimental data regarding the influence of tree defoliation on the polarization diversity gain are not publicly available, apart from [3] where the nomadic satellite channel is considered, albeit only for the case of a geostationary satellite and full in-leaf vegetation. This is why we have performed a series of measurements at 2.0 GHz in a vegetated area in Prague, the Czech Republic.…”

“…Mobile [2,3] or static [4][5][6] users have been the focus of most studies in vegetated areas. On the one hand, in order to characterize a propagation channel for a static user, a representative scenario is selected and a vast range of elevation and azimuth angles is considered to account for different satellite positions.…”

First-Order Statistics Prediction for a Propagation Channel of Arbitrary Non-Geostationary Satellite Orbits

“…Generally, such models need to be based on available experimental data; however, obtaining suitable experimental data is demanding. It is common to utilize a so-called pseudo-satellite which may be in a form of a transmitter (Tx) placed on a helicopter [9][10][11] or a remote-controlled airship [7], [12], [13], at a crane or the upper-most point in the surroundings for fixed-elevation measurements [14][15][16], or even collect data from an existing satellite [17][18][19].…”