On the use of Tamir´s model for site-specific path loss prediction of HF/VHF systems in forests

One of the most referenced analytical methods to calculate the HF and VHF radio propagation loss in forests is Tamir´s model. Though it is very straightforward for point-area radio coverage planning, its extension for site-specific predictions is actually an open problem. In the present work, a heuristic approach is proposed to this matter, when digital terrain and treetops heights models are available. Preliminary outcomes were computed by a Matlab code implementation of the adapted model. Coherent results were observed, with a “height gain” typical of site-specific methods clearly standing out.