Our Glossary - an Overview of the Most Important Terms

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Interesting Facts A-Z

COMPASS
Chinese satellite positioning system, anticipated start is 2010.
DGPS/DGNSS
DGPS or rather DGNSS means differential GPS (or GNSS with multiple satellite systems in use). It is a method of achieving higher accuracy by processing correction data of a reference station. This method takes advantage of the fact that the local deviation occurring in satellite-based positioning is almost the same as the deviation at the reference station near by and is growing with an increase in distance. Thus, the deviation can be reduced mathematically.
GALILEO
The European system for satellite-based positioning is an equivalent to the US-American GPS. It is anticipated to be fully operable by 2013. Due to GALILEO the availability of satellites will be increased so much that GNSS is going to be interesting for a lot of new applications.
GLONASS
Global Navigation Satellite Systems – the Russian positioning system is an equivalent to the US-American GPS. The first principles are the same; however, a major difference is that every satellite sends out signals on its own frequency. When using our services PED and ED, you are able to receive GLONASS data along with GPS.
GNSS
Global Navigation Satellite Systems – a general term for all current satellite-based positioning systems in use. GNSS usually includes GPS and GLONASS, in the future also GALILEO and possibly COMPASS.
GPRS
General Packet Radio Systems – a service based on GSM, which enables the supply of correction data in the form of data packets via the internet.
GPS
Global Positioning Systems, originally called NAVSTAR GPS, is the satellite positioning system of the United States. 32 satellites circle the earth on 6 orbits and make possible global positioning around the clock. Another extension is planned for this satellite system. The frequency L5 will be added and older satellites will be replaced by new ones having more precise clocks and a longer lifetime. AXIO-NET provides correction data using this established system.
GSM
Global System for Mobile Communication - the mobile connection known worldwide.
RTK
Real-time kinematics is a differential method of positioning (see DGNSS). Its most significant difference is the use of phase measurement procedures along with common code measurement. If all ambiguities can be resolved, an accuracy of 2 cm in real-time can be achieved.
UMTS
UMTS is a standard for mobile internet connections via the GSM network. UMTS is often called the third generation of GSM because UMTS offers many new possibilities, especially due to its higher bandwidth. UMTS may be used for the transport of correction data, but it does not have any advantages. In fact, in rural areas the network coverage is very thin which leads to a lot of problems. This is the reason why AXIO-NET services are not offered for UMTS. Even though it is possible to use AXIO-NET services with your own SIM-cards via UMTS.

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