Advanced Navigation has released a free program for testing their inertial pedestrian navigation technology currently in the final stages of development. The program can be used to post process data from a leg mounted Spatial unit for indoor pedestrian navigation.
Advanced Navigation's pedestrian navigation technology is designed for human navigation through areas where GPS signals are not available such as indoor environments. It has been developed for tracking personnel in high risk environments such as mine sites and chemical plants. The technology is being developed into rechargable ankle mount trackers that send real time data back to a central server over WiFi.
The navigation filter has been extensively tested in a number of different environments and has reliably demonstrated positioning performance of less than 4% of distance travelled over extended time periods. The filter uses a combination of step detection, stride estimation and a number of novel algorithms to deliver reliable navigation performance under a broad range of environments.
Shown below is results from testing on a basketball court where the position can be easily compared with the court lines from satellite imagery.
In this test the position error was 0.8% of distance travelled. A log file of the results that can be opened in Google Earth can be downloaded from this link.
The free post processing program that can be used to test the technology with a Spatial device can be downloaded from this link. The program requires that the raw sensors packet be set to output at 200Hz and it is recommended to have the system state packet output at 200Hz for timing, initialisation and error checking. The program generates output log files in the same directory as the input ANPP log file. It does not use the Spatial position, velocity or orientation except for optional automatic initialisation.
The Spatial unit should be mounted on the ankle as shown in the image below.