How does precision GPS work ( DGNSS , RTK , SBAS , PPP )?

This is a synthesized basic explanation of how precision GPS methods work:
-Differential GNSS (DGNSS)
-Real Time Kinematics (RTK)
-Satellite Based Augmentation System (SBAS)
-Precision Point Positionning (PPP)

Sources and more information can be found here:
-European Space Agency (ESA) navipedia (


Very nice. Thanks for sharing!

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Olivier, you’re very welcome, thx.

Very nice introduction of the positioning principle.

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