Investigation of Low Altitude Air-to-Ground Channel over a Tropical Sea Surface at C Band

This paper investigate a low altitude air-to-ground channel over a sea surface in the tropical region at C band. It is found that, compared to a high altitude air-to-ground channel where a free space propagation condition can be assumed, the sea surface reflection and other multipath propagation phenomena for lower altitude air-to-ground channel can readily be observed. Therefore, for low altitude flight paths, spatial diversity at the ground station can be used to overcome signal degradation.