Procedures and systems for determining the time variation of signal transmission and propagation for measuring distance, synchronization functions and georeferencing applications

摘要

It includes: four references (a, B, C, d) of four known positions on the ground, such as a coded time mark sent by one of them, which is forwarded by the repeater and received by each reference; two sets of three different references can be used to calculate the difference. Between two positions of repeaterChanges in time, phase or frequency allocated to the last time, as well as changes in time due to the propagation of Senal in the middle, for each elevation angle found for the relay station; It can then be determined that the values due to time changes have a slight difference between the two positions of the repeating station.The determined time variation can be used to correctly determine the relay station and its use in related applications.