# RTK vs PPK

RTK ( Real Time Kinematics) and PPK (Post Processing Kinematics) are two different methods to provide accuracy corrections to drone imagery. RTK corrections happen in real time. PPK corrections happen in post processing after the flight. Each method has pros and cons depending on your site and workflow.

## RTK

* Corrections applied during flight via a live link to a base station or CORS network.
* Enables instant centimeter-level accuracy for geotagging images.
* Ideal for time-sensitive projects like construction monitoring or emergency inspections.
* Requires a stable connection throughout the flight, signal loss can reduce accuracy.

## PPK

* Corrections applied after the flight using raw GNSS data from both drone and base station.
* More resilient to signal dropouts, making it suitable for remote or obstructed environments.
* Offers high accuracy, often better than RTK in challenging conditions.
* Requires additional post-processing time and software.

## Comparison

| Feature             | RTK                            | PPK                              |
| ------------------- | ------------------------------ | -------------------------------- |
| Correction Timing   | Real-time during flight        | After flight (post-processing)   |
| Connectivity Needed | Constant live link             | None during flight               |
| Workflow Speed      | Fast, immediate results        | Slower, requires post processing |
| Accuracy            | High, but connection-dependent | High, more consistent            |
| Best Use Cases      | Construction, inspections      | Remote Mapping, large areas      |