Uncertainty distribution of variation of received signal strength due to seasonal effect on coniferous trees

The existence of trees in the path of a communication link has an impact on quality of received signal. Trees can be classified broadly into deciduous and coniferous (evergreen). Seasonal effect on signal strength due to obstruction of deciduous trees is well discussed in literature, where offset values are usually added to path loss to account for seasons´ effect for in-leaf and out-of-leaf propagation conditions. Seasonal variation causes different type of changes on coniferous trees, which is reflected in their electrical properties due to different amount of water contents. These changes make their interaction with electromagnetic waves such as scattering, diffraction, transmission, have different behavior in different seasons. The effect due to obstruction of coniferous trees has received very little attention in literature. In this work, we investigate impact of seasonal variation of coniferous trees on received signal strength and how to model it.