Prague: Recent tests conducted by Rx Networks, one of the leading mobile location technology and services company, measured the performance of Galileo when used in various combinations with GPS and GLONASS. Conducted in real-world environments such as urban canyons and indoors, each test consisted of a three hour data capture of the GNSS signals which was later replayed to produce hundreds of fixes using a multi-constellation GNSS receiver from STMicroelectronics.
These difficult environments pose significant challenges in regards to location accuracy due to multipath and obstructed views of satellites. However, because people often use location based services within these environments, it was important to test the accuracy.
GSA claims the results showed that adding Galileo on top of GPS and GLONASS improves the accuracy of location fixes when indoors or in urban canyons. However, as expected, the GPS+Galileo combination did not exceed the performance of GPS+GLONASS, as signals only four Galileo satellites were available at the time of the testing. It also said that the performance of Galileo with GPS or other GNSS will further improve in the future, as more Galileo satellites are launched.
This improved accuracy will have a profound impact across numerous sectors, including critical situations like E-112 calls. With the European Commission evaluating the mandate of GNSS location on mobile phones for emergency calling purposes, the test results demonstrate the benefit of including Galileo. As part of the program, Rx Networks upgraded its Global Reference Network to include support for Galileo. Follow up tests are planned once the full Galileo constellation is available.