PPK stands for “Post-Processed Kinematic.” It’s a technique used in the field of surveying, geodesy, and remote sensing, particularly in the context of Global Navigation Satellite Systems (GNSS) technology, such as GPS (Global Positioning System) and other satellite-based navigation systems. PPK involves collecting raw GNSS data from a receiver on a moving platform, such as a drone or a surveying instrument. Unlike Real-Time Kinematic (RTK) positioning, where corrections are applied in real-time, PPK data is collected without applying corrections during data acquisition. Instead, these corrections are applied later during post-processing. In the post-processing phase, the collected GNSS data is combined with correction data from a reference station or base station with known coordinates. This correction data helps to enhance the accuracy of the GNSS measurements by compensating for errors caused by atmospheric conditions, satellite orbits, and other factors. By comparing the raw data to the corrected data, PPK can achieve high levels of positional accuracy. PPK is widely used in various industries, including surveying, mapping, agriculture, and drone-based uses. It allows for accurate positioning without the need for real-time communication with a reference station, making it particularly useful in remote or challenging environments where real-time corrections might not be readily available.