Compare different GNSS positioning techniques and their accuracies.

GNSS techniques: Single Point Positioning (SPP) using code measurement provides 5-15m accuracy for navigation. DGPS with real-time corrections achieves 0.5-3m. Static surveying with post-processing of carrier phase over hours achieves 1-10mm accuracy for control surveys. Rapid static (15-30 min sessions) provides 5-20mm. RTK with real-time carrier phase correction achieves 10-20mm. PPP (Precise Point Positioning) using precise ephemeris achieves sub-decimeter without base station. Network RTK using multiple reference stations provides consistent centimeter accuracy over large areas.