US Pat. No. 11,032,791

METHOD AND SYSTEM FOR DYNAMICALLY ADJUSTING COMMUNICATION CHARACTERISTICS OF SATELLITE COMMUNICATION LINKS BASED ON WEATHER NOWCASTING

Advantech Wireless Ltd., ...

1. A method comprising:receiving weather data related to a specified geographic area from at least one source comprising a weather radar transmitting radar signals;
obtaining a position of at least one terminal located in said specified area and a position of a communication satellite being in communication via a communication link with said terminal;
generating nowcasting predictions of weather conditions measure along at least one estimated future communication path between said communication satellite and said terminal, based on the received weather data and the obtained positions, wherein the generating comprises:
defining the communication link as a three-dimensional vector passing through a plurality of cells along said at least one estimated future communication path;
determining the cells affected by weather conditions as affected cells, and
extracting the nowcasting predictions corresponding to the affected cells;
converting the nowcasting predictions of weather conditions measure to corresponding predicted levels of signal attenuation in dB per length unit for each of the affected cells,
wherein said converting is carried out using the following formula:

wherein ?R represents the signal attenuation in dB per km for a specific rainfall rate R given in mm per hour and dBZ represents a meteorological measure of equivalent reflectivity Z of the radar signal reflected off a remote object, and wherein k, ?, a, and b are coefficients associated with the weather radar;
calculating a predicted signal attenuation integral, based on said corresponding predicted levels of signal attenuation for each of the affected cells, each weighted by the corresponding cell path length, along said at least one estimated future communication path; and
dynamically adjusting at least one communication characteristic of a communication link along said at least one estimated future communication path, according to the corresponding calculated predicted signal attenuation integral.