PPP Technique Analysis Based on Time Convergence, Repeatability, IGS Products, Different Software Processing, and GPS+GLONASS Constellation

In recent years interest has increased for precise point positioning (PPP), which provides an alternative to precise relative processing because of its potential as a reliable absolute positioning technique. PPP technique takes advantage of satellite orbit and clock products obtained from the global infrastructure of permanent stations. As a result, PPP requires only one dual-frequency, carrier-phase global positioning system (GPS) receiver on the client side and, thus, avoids the expensive and logistic difficulties of deploying a network of global navigation satellite system (GNSS) receivers around survey areas or in isolated places, such as the Arctic or less populated areas. The broad question of the place of PPP in the future spectrum of space geodetic measurement techniques is addressed in this study by investigating specific aspects of PPP. These aspects involve the following: (1) the time convergence solution in coordinates and accuracy; (2) the observational time required to guarantee the absolute...

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