The Multi-GNSS Experiment (MGEX) has been set-up by the IGS to track, collate and analyze all available GNSS signals. This includes signals from the BeiDou, Galileo, QZSS, and NAVIC systems, as well as from modernized GPS and GLONASS satellites and any space-based augmentation system (SBAS) of interest. Analysis centers characterize new satellites and signals, compare equipment performance and further develop processing software capable of handling multiple GNSS observation data. The IGS product portfolio will contoinuously be extended to cover precise ephemeris data and bias information for all constellations.

Over a period of four years, a global network of multi-GNSS stations has been established and integrated with the existing network of GPS/GLONASS reference stations. In parallel, orbit and clock products for most new constelaltions are generated on a routine basis. It has therefore been decided in early 2016 to terminate the experimental phase of MGEX and to pursue the IGS multi-GNSS activities as a pilot project. Given the high recognition received so far, the name "MGEX" will be retained for the pilot project.

2017/10/09 Launch of the fourth QZSS satellite MICHIBIKI-4
2017/10/06 Galileo FOC satellite metadata published
2017/09/15 Start of QZS-2 trial service
2017/09/10 Start of QZS-3 signal transmission
2017/08/19 Launch of the third QZSS satellite MICHIBIKI-3
2017/08/09 Galileo FOC FM-13 declared "usable"
2017/08/01 Galileo FOC FM-12 declared "usable"
2017/06/27 Start of QZS-2 signal transmission
2017/06/01 Launch of the second QZSS satellite MICHIBIKI-2
2017/05/29 Galileo FOC FM-07/14 declared "usable"
2017/04/22 Start of Galileo FOC FM-12/13 (E03/E04) signal transmission
2017/03/03 Start of Galileo FOC FM-14 (E05) signal transmission
2017/03/02 Start of Galileo FOC FM-07 (E07) signal transmission
2017/01/31 IRNSS 1A clock failures
2017/01/19 ESA: Galileo clock anomalies under investigation
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GNSS Constellations

Status information and reference data for the various navigation satellite systems can be obtained by clicking on the icons above. Primary attention is given to the emerging constellations that are currently deployed and undergoing initial validation.



The current status of the global multi-GNSS network is shown on the IGS Network page along with supporting information from the site database.

Data and Products
Data Products
Data Products

An overview of MGEX offline data holdings and real-time data streams is given on the Data page. For offline and real-time products, please refer to the Products page.

Referencing IGS and the MGEX Project

In accord with the overall policy of the IGS, all MGEX data and products are freely available for public use. To help IGS agencies justify funding requests, we request that users include a citation when use of IGS data or products results in a publication. For MGEX-related work, please reference

For general IGS data and products, please include a citation of

For specific MGEX products, links to recommended references are provided in the products table.

The Multi-GNSS Pilot Project encourages contributions to its overall goals by interested institutions and individuals. New contributions may cover data, products and analyses of all global and regional navigation satellite systems, but should complement existing MGEX capabilities and avoid redundancy. Specific areas of interest include support of NAVIC, 3rd generation BeiDou satllite signals, the combination and validation of multi-GNSS orbit and clock products, the characterization of the GNSS space segment (radiation pressure modeling, antenna calibrations, etc.), and the generation of real-time multi-GNSS products. Proposals for new contributions can be coordinated through the various members of the Multi-GNSS Working Group.

Last Updated: 2017/10/18 14:44:03
The Central Bureau is sponsored by the National Aeronautics and Space Administration (NASA) and managed for NASA by the Jet Propulsion Laboratory of the California Institute of Technology.