Integrity information to improve user timing accuracy and positioning.
The Time Integrity Service aims to test the capability to deliver a time integrity service to the GNSS users providing integrity information to improve user timing accuracy as well as positioning. The status of Galileo satellite clocks is continuously monitored, detecting in real time possible anomalies and generating automatic alerts in case the satellite is considered unusable. The Service is additionally monitoring the timing parameters broadcast in the Galileo Navigation Message, providing to the users a validation and performance assessment of the timing information disseminated by the Galileo System.
Check of the status of Galileo satellite clocks, receiving information about which satellite clocks are not behaving well and consequently about which SV should be excluded from the timing information and position determination to improve accuracy.
Monitoring of the timing parameters broadcast in the Galileo Navigation Message
Visualization of the performance at user level of the timing information disseminated by the Galileo System.
Verification that the accuracy of the time estimated at user level is within certain limits with respect to a reference time
The service is intended as a first step to test the concepts and performance of a Galileo time integrity system with the double aim:
to provide information about the satellite clock status, reporting as not usable the satellites for which an anomaly is detected and excluding them from the timing information and position determination
to validate the performance, also at user level, of the timing information disseminated by the Galileo System
The results of this validation activity will be displayed on the DEMETRA web page, whose access is restricted only to authenticated users.