MultiNAV

Objectives |Features |Main Benefits |Status

Entwicklung von Algorithmen und Software für GNSS-Empfänger neuester Technologie unter besonderer Berücksichtigung von Echzeit- Anwendungen und Sensorintegrationen
(MultiNAV)

Prime Contractor

Dresden University
of Technology [D]

Funding

Project funded by the German Federal Ministry of Education and Research.
Reference No.: 50 NA 0015

Project Partners

Telematica e.K. [D]

Contact:

Objectives

Developing and testing of algorithms and the related software for real-time navigation and positioning was the fundamental issue of the MULTINAV Project. The used navigation sensors included GNSS (GPS and GLONASS as well as Galileo and EGNOS capability). To increase the utilisability and availability algorithms have been developed and implemented to use the terrestrial radionavigation system LORAN-C.

The GSM/UMTS part mainly has been discussed theoretically, because the Germany-wide implementation of high precise positioning and navigation on that basis is not foreseeable. A software developed within the MULTINAV project allows the evaluation of signal strengths of a GSM network, which may result in a receiver postition estimation.

Features

The figure shows the scheme of position calculation for satellite navigation. In principle measurements from GPS, GLONASS or Galileo can be used as input. Combined measurements of GPS/GLONASS/Galileo are processed in the same way.

However, the implementation into the software depends on the satellite system, because the data format of the ephemerids differ within the navigation message. Galileo data were not further analysed.

Scheme of Position Calculation (Satellite Navigation)

The following figure shows the relations of several software modules which are combined in a multithreading architecture.

Click image to get a larger version.

Main Benefits

Generally, the integration of GNSS and LORAN-C is a promising method to enhance availability, reliability and accuracy of positioning compared to GNSS stand-alone solutions. The geometry of the existing LORAN-C infrastructure in Europe is not sufficient. The reactivation of existing transmitters in southern Europe or the installation of about 2 or 3 new LORAN-C stations could improve the situation remarkably. One should keep in mind that installation costs of a single LORAN-C transmitter are only about 6 million Euro.

Status