Definition
PPK, or Post-Processed Kinematic, is a GNSS technique that achieves centimetre-level positioning by correcting satellite data after it has been collected, rather than in real time. The raw data from a moving receiver and a base station is combined later during processing.
Because corrections are applied afterward, PPK does not need a constant live connection between units in the field. This makes it reliable in situations where a real-time link would be difficult, while still delivering high accuracy.
In simple terms, PPK reaches precise positions by fixing the GNSS data later, in the office rather than live.
How It Works
During capture, both a base station at a known point and a moving rover record raw GNSS data with accurate timing. Unlike real-time methods, no corrections are exchanged in the field, so the equipment simply logs its measurements.
Afterward, software combines the base and rover data, using the shared satellite observations to cancel out errors and calculate precise positions along the rover’s path. The result is centimetre-level accuracy without needing a live radio or network link during the survey.
Applications
PPK is used in drone mapping, surveying, and corridor mapping. It is especially useful where maintaining a real-time correction link is impractical, such as over long distances or in remote areas, while still delivering the accuracy needed for precise results.
Benefits
- Centimetre accuracy without a live link.
- Reliable in remote or challenging areas.
- Robust data logging in the field.
- Strong fit with drone mapping.
- Corrections refined during processing.
Related Terms
- RTK (Real-Time Kinematic)
- GNSS (Global Navigation Satellite System)
- Georeference
- Drone Mapping
Frequently Asked Questions
What is PPK used for?
It is used for precise GNSS positioning in drone mapping and surveying, especially where a real-time link is impractical.
What is the difference between PPK and RTK?
RTK applies corrections live in the field, while PPK applies them afterward during post-processing.
Does PPK need a live connection?
No. PPK logs raw data and corrects it later, so no constant field link is required.
How accurate is PPK?
PPK can achieve centimetre-level accuracy, comparable to RTK.
About Track3D
Track3D helps teams turn precise PPK-referenced data into accurate digital twins. Learn more at Track3D.
