Positioning through the Internet via the SISNeT technology

SISNeT can grant noteworthy advantages to the GPS land-user community. A user equipped with a GPS receiver and a GSM / GPRS modem can access the SISNeT services and benefit from the EGNOS augmentation signals, even under situations of GEO blocking. In this kind of application, the UAS is usually situated in a vehicle, and access to the Internet (and hence, to SISNeT) is established by means of the GSM / GPRS wireless networks.

The processing stage of the UAS is in contact with a GPS receiver, so that pseudo-range measurements can be obtained. In parallel, the processing stage interacts with the DS2DC Client software, which provides the corrections broadcast by the ESTB through SISNeT. With that information, a set of algorithms can compute the corrected position, notably improving the accuracy of the GPS-only receiver.
ESA has shown a strong interest in these kind of applications, starting several contracts centred around the development of SISNeT-powered handheld receivers.