SUCCESS RATES FOR INTEGRATED GPS AND GALILEO AMBIGUITY RESOLUTION

Abstract

Modernized GPS and the future European Galileo system will offer unprecedented accuracy and availability for precise positioning applications. For these applications, the ambiguities of the carrier observations have to be resolved to their integer values. The ambiguity success rate is a valuable design parameter to determine if the ambiguities can indeed be resolved correctly to their integer values. In this contribution, an overview is given of the modernized GPS and Galileo signals, followed by the models used for precise positioning over short, long and intermediate distances and the computation of ambiguity success rates. Finally, success rates are computed for a number of observation scenarios, ranging from current dual-frequency GPS to integrated triple-frequency GPS and Galileo.

Keywords

• GPS
• Galileo
• ambiguity resolution
• ambiguity success rate.