All-in-View Time Difference Solution for eLoran

摘要

Pulse-phase radio navigation systems operating in the low frequency range used to perform the task of backing up global navigation satellite systems. The reasons for this were the low power of GPS signals, as well as their vulnerability to random or targeted interference. In the first part of the article, the main methods of obtaining the coordinates of the receiver are indicated when receiving several radio navigation chains. This is a hyperbolic method and a pseudorange method. These methods have both advantages and disadvantages associated with the fact that in many regions the pulse-phase radio navigation stations are not fully modernized. The article presents an iterative algorithm for converting the differences in the arrival times of radio pulses from all chains received in the region into geographic coordinates, regardless of whether the chains have synchronization of secondary stations with UTC. This method successfully removes the limitations of the hyperbolic method and the pseudorange method indicated in the article.