Application Of A Meteorological Model To Investigate The Effects Of Atmospheric Circulation On Microwave Line-Of-Sight Links

Abstract

surface. The greater part of such fadings are caused by alterations in the thermodynamic structure of the Planetary Boundary Layer (the This study presents an investigation of lake-land breeze atmospheric circulation responsible for strong horizontal and vertical inhomogeneities of lower portion of troposphere), caused by the moisture distribution affecting the refractivity influences of weather systems and also by local profile within a microwave propagation link as atmospheric circulations, resulting from diurnal observed during a Radiometeorological variation of horizontal pressure gradient, induced Exueriment camed out in Sa0 Paul0 Brazil. An Atmospheric Boundary Layer Mesoscale model (RAMS) was used to simulate the local circulation within the link region and to compute the time evolution of the vertiical structure of the refractivity index. A Ray Tracing model WSLS also used in order to simulate the intensity of the received signals under those circumstances. The integrated results were compared to measured received signals on the imicrowave link. It was observed a good agreement between the simulated characteristics of the temperature and moisture advection and the observed microwave propagation phenomena in the link. by surface inhomogeneities. Sea-Land breeze, River and Lake-Land breeze are examples of such circulations. With the purpose to investigate the impact of meteorological phenomena on microwave communication systems, a data set from a radio-meteorological experiment performed in Sao Paul0 Brazil region was used to perform a diagnostic of propagation conditions on microwave line-of-sight links located near to a river and a water reservoir.