Galileo down - July 2019 (Part 1)

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Update on July 16th 2019: Click here to go to the update in this page.

15/07/2019

As reported by the European GNSS Agency - GSA in this news, the Galileo system is down: Galileo, the EU's satellite navigation system, is currently affected by a technical incident related to its ground infrastructure. The incident has led to a temporary interruption of the Galileo initial navigation and timing services, with the exception of the Galileo Search and Rescue (SAR) service. The SAR service - used for locating and helping people in distress situations for example at sea or mountains - is unaffected and remains operational.

Last Saturday night (to be precise, at 20:15 of 2019-07-13), the GSC released its latest Notice Advisory to Galileo Users (NAGU), reporting Service Outage for all the Galileo satellites: their Signals in Space (SISs) are not usable until further notice. However, since we are curious Galileo Users, this morning we have switched on our receivers and started observing what is happening to Galileo from the point of view of the users. And some interesting observations came out. Let’s see.

First, our software receivers prove that the SISs are correctly trackable, with normal power levels and Doppler profiles within feasible limits. At the time of the first analysis seven satellites where visible on the sky over Torino, Italy. Hereafter a screenshot of the GUI of our NGene software receiver, during this morning data collections. Notice the status “navigation” assigned to all the healthy GPS and Galileo satellites and the position computed on the map.

Second, more curious: the position solution computed using both the GPS and Galileo constellation is affected by errors on the order of 500 meters or even more. Hereafter in red the positions computed between 07:14:54 and 07:24:54 UTC plotted on Google Earth. The true antenna position is represented by the green pin. The big jumps of the estimated position happen as soon as a new Galileo pseudorange is added to the set of satellites used for the PVT solution.