Patent ID: 9715017
Date: 2017-07-25
CPC Classifications: G01S,G04F,G04R

Claim:
1. A system for deriving a precise time reference with the aid of DME beacon signals from a DME beacon station, comprising: a DME reference station located within range of the DME beacon signals from the DME beacon station, the DME reference station receiving GNSS signals and determining a precise time reference therefrom, the DME reference station also receiving DME beacon signals from the DME beacon station and determining the time of transmission of one or more of the DME beacon signals from the DME beacon station based at least in part on the distance between the DME beacon station and the DME reference station; and a receiver also located within range of the DME beacon signals from the DME beacon station, the receiver being in communication with the DME reference station to receive from the DME reference station the time of transmission of the one or more DME beacon signals, wherein the receiver derives a precise time reference based at least in part on: