Now, you might be wondering where does PPK come in. This is where things get tricky because we’re not strictly comparing apples to apples. PPK isn’t hardware, but rather a different processing workflow using an RTK drone.
PPK stands for “post-processing kinematic.” The difference with PPK workflows is how we process base station data for correction and accuracy.
With PPK, the drone will geotag X,Y,Z coordinates to each image based on that on-board GPS unit. While this is happening, a base (be it a base station, an AeroPoint, or CORS network) is also recording positional information, but with much more accurate triangulation.
After the flight is over, those two sets of GPS data are matched up using the photo timestamp. Then the initial, less-than-accurate onboard GPS data is corrected, giving precise geotags for the imagery
While “real-time” technologies are appropriate in some situations, post-processing flight data using a PPK workflow brings an additional layer of reliability to your surveys.
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