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Table 8 GNSS positioning techniques

From: Indoor navigation: state of the art and future trends

Technique Accuracy Measurement Methods for accuracy improvement
SPP Meter-level Pseudo-range None
DGNSS Decimeter-level to meter-level Pseudo-range Differential measurements
RTK Centimeter-level Carrier-phase Differential measurements, ambiguity resolution
PPP Decimeter-level to centimeter-level Carrier-phase Precise satellite orbit and clock corrections, float ambiguity
PPP-AR Similar to RTK Carrier-phase Precise satellite orbit and clock corrections, ambiguity resolution