GeoMotes and GeoCubes

The GeoMotes are mini-GPS devices (about 30 x 40 x 10mm, antenna included) that provide an accuracy better than one centimeter, thanks to a post data processing based on a differential calculus.

These devices can be embedded in self-powered systems which are connected wirelessly to each other in order to set up a network. Each node, named GeoCube, can continuously provide GPS data to one PC. Furthermore, GeoCube is equipped with a three axis MEMS accelerometer which is able to detect high frequency displacements. Therefore GeoCube is able to send a warning, then GPS data are being recorded and new positions are computed with one hour delay.

A network of GeoCubes is a mesh with wireless links that can monitor a local area of about one square kilometer. This network is small, easy to install and a low cost solution for geohazard predictions. Each node, i.e. each Geocube, is geo-localized with a relative positioning accuracy better than one centimeter in planimetry and two centimeters in altimetry. Moreover, time accuracy of each GeoCube is better than 50ns: it can easily and precisely date or initiate events.