Nowcasting and Short-term Forecasting Method for Maximum Usable Frequency of HF Communication Base on Oblique Sounder
Fu We · Journal of China Academy of Electronics and Information Technology · 2013
A nowcasting and short-term forecasting method for maximum usable frequency of HF communication base on oblique sounder is presented. The method includes three steps: firstly,the critical frequency at the path midpoint is inversed from the oblique sounding data and its forecasting data by based on simple empirical method; secondly,the critical frequency is reconstructed by geometric proportion weighted method; in the end,the nowcasting and short-term forecasting results is given for maximum usable frequency of HF communication circuit. By using the oblique sounding data of during March 2012,the accuracy and practicability of the method are validated: the root-mean-square error of the nowcasting method are 1. 41 MHz and 10. 09%,and that of short-term forecasting method are 11. 48 and 11. 90%. The accuracy of nowcasting and short-term forecasting method is improved obviously,contrasting to that of the long-term prediction method.