AirGon Sensor Package
ASPSuite provides the software tools required to convert raw GNSS L1/L2 observation files from Loki Geopositioning systems and DJI Phantom 4 RTK (P4R) drones into precise locations for image processing. It is the intermediate step between landing the drone and feeding image data to Structure from Motion (SfM) software (Metashape, Pix4D, etc.).
ASPSuite post-processing combines the raw data from a local base station or virtual reference system (VRS) and the Loki/P4R system to create a flight trajectory. The camera trigger events are then used to determine the time along this trajectory of each exposure station. The precise X, Y, Z location of the camera is then interpolated from the trajectory. These final exposure locations can then be exported as a comma separated values (CSV) file and/or encoded into the Exchangeable Image File Format (EXIF) header data of the image files. The result is image geotagging information accurate to PPK level
ASPSuite processing is quite simple. The data files are imported and a Solve button is pressed. Advanced users can adjust various parameters, but this is not necessary for normal processing. Once the image geotagging is complete, point cloud processing proceeds in the normal fashion. The output will work with any SfM software that allows you to specify the estimated accuracy of image locations. Processing software such as Pix4D and Metashape fully support these a priori accuracy estimates.
In addition to performing Post-Processed Kinematic (PPK) processing, ASPSuite includes support for options often required in engineering grade surveys such as: