Performance Prediction for Short-Range Troposcatter Links

This correspondence presents a modification to the Bello single-integral troposcatter channel model. The objective of the modification is to improve the model's ability to accurately predict the delay power spectrum of troposcatter paths of less than 150 mi. The model was modified by treating the scatter-angle exponent as a function of path length rather than a constant. The data from six shortrange troposcatter paths were compared with Bello model predictions using various values of the scatter-angle exponent. The results indicate a possible first-order relationship between the scatter-angle exponent and path length. Use of this relationship in the Bello model significantly improved the prediction performance for the six paths analyzed.