What is PPK (Post-Processed Kinematic) and How It Differs From RTK
RTK corrects GPS position in real time, during the flight itself. PPK takes the opposite approach: record raw satellite data during flight, then apply the correction afterward in office processing. Both achieve centimeter accuracy, but the choice between them affects reliability, connectivity requirements, and workflow significantly.
How PPK Works
1
Raw Data Recording
2
Base Station Logging
3
Office Processing
PPK vs RTK: Direct Comparison
RTK correction happens live in the field, visible to the surveyor immediately. PPK confirms accuracy only after office processing.
| Factor | RTK | PPK |
|---|---|---|
| Correction timing | Real time, during flight | After flight, in office |
| Connectivity needed | Continuous radio or internet link | None during flight itself |
| Signal dropout risk | Can lose correction mid-flight | Recoverable in post-processing |
| Immediate field verification | Yes, accuracy visible live | No, confirmed only after processing |
2cm
Accuracy achievable by both methods
Zero
PPK vulnerability to link dropout mid-flight
1 hr
Typical PPK office processing time
Which Method Should You Choose
PPK is more robust in remote or noisy signal environments
For projects in areas with unreliable mobile network coverage or radio interference, PPK's ability to correct data after the fact removes the risk of accuracy loss due to signal dropout during flight, a real concern for RTK in challenging terrain.
We choose between RTK and PPK based on your project's connectivity conditions and accuracy requirements, ensuring reliable results regardless of site challenges. Learn more about our drone survey services.
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