To manage land and infrastructure efficiently accurate mapping and surveying are essential. Utility companies map infrastructure and local authorities need access to a Geo-referenced inventory of anything from park benches to street signs or underground water pipes. Global navigation satellite systems or GNSS are widely used because they’re more cost-effective and flexible than traditional ground surveying methods.
GNSS mapping systems require accurate and reliable positioning that – in many cases – can’t be achieved by relying solely on GPS. Two of Europe’s flagship space programs EGNOS and Galileo improved positioning accuracy and integrity. EGNOS the European geostationary navigation overlay service uses geostationary satellites and a network of ground stations to increase the accuracy of existing satellite positioning signals while providing a crucial integrity message informing users in the event of signal problems. Galileo is Europe’s global satellite navigation system that provides highly performance global positioning and timing services under civilian control, but how can EGNOS and Galileo make a difference?
To make positioning more accurate and reliable especially in urban areas virtually all survey and grade receivers combine signals from different GNSS . The additional satellites and unique signal structure of Galileo can substantially impact data acquisition companies, by improving – for example – accuracy, availability and continuity. Galileo gives new signals on the only 5-band and these signals are really useful in terms of they’re used for serving type of applications. It is used to measure for example in big cities when we have skyscrapers on the left and on the right where you have a lot of multi-path effects, with Galileo we can really overcome these problems and make also GNSS work in conditions where it maybe was a problem a couple of years ago. Also EGNOS is very important especially now in the mapping environments better accuracy provides better decision-making.
Galileo significantly improves the availability of satellites to obtain an accurate positioning, moreover EGNOS provides constant real-time positioning corrections. Galileo satellites have a better angle for the Nordic at latitudes, the reliability of results with Galileo is better than just GPS and GLONASS.