Kalman Filter software

All VBOX's with datalogging capability come with the software described above. A demo version of the Analysis software can be downloaded from our website. Registered VBOX users can download all the latest versions of the modules above. (Software support/ registration is free for the first year of VBOX ownership.)

Example of Output

Main Screen

The Kalman filter is very powerful because it takes the velocity, heading and position data to extract a corrected velocity and position output. This is possible because the velocity and heading are measured using Doppler shift, and the position by GPS triangulation. Combining the two gives much better results, and is made even better by being able to process both forwards and backwards through the data.

To assist in post processing of files that have been generated near trees, buildings, or bridges, we have just released a powerful Kalman Filter module. This filter can be used to remove any jumps in position data, and can also correct any velocity spikes and dropouts. An example is shown below where some data was taken at a roundabout in a built up area. The red trace is the original data, and the blue trace is the corrected data.

Kalman Filter