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A new way of accessing GNSS data and products for Solid Earth Science researchers

This page provides information about the infrastructure and the software developed to access the EPOS GNSS data and products.         

The set of tools installed at the EPOS-GNSS Data Gateway, the EPOS-GNSS Product Portal and at the GNSS Data Nodes is called EPOS GLASS Package (see Figure 1). In collaboration with EUREF, multiple GLASS nodes are interconnected to provide a single access point through web portals to:

  • Validated GNSS Station metada
  • Quality-controlled GNSS observation data
  • Derived products
Figure 1.

EPOS GLASS Package

Figure 2 shows the architecture of the main components of the GLASS package and the teams responsible for their maintenance.

With this set of tools, it is possible to fully manage the functionality of the nodes. It is possible to insert new metadata, visualize all the metadata of the GNSS data inserted in the database, check the quality of the data and synchronize station and file metadata between the different components. This set of tools is available on gitlab https://gitlab.com/gpseurope. 

  • The Database schema is necessary for storing all GNSS station and file metadata – (UBI)
  • IndexGD allows to index the metadata of the GNSS observation (RINEX) files – (CNRS-OCA)
  • FWSS is an API for inserting metadata for the GNSS stations, the RINEX files and the quality indicators in the database  – (INGV)
  • EPOS Glass Framework is an API that serves the metadata stored in the database – (UBI)
  • RunQC allows to check the quality of the GNSS data using Anubis software (developed by GOP) – (ROB)
  • Synchronization system allows to synchronize metadata between nodes and DGW – (UBI)
  • GLASS web client is the GUI used by the DGW and the nodes to explore the metadata and data – (CNRS-OCA)
  • pyglass is a command line client allowing to retrieve station metadata, RINEX file metadata and download the RINEX files – (CNRS-OCA)

 

Figure 2

EPOS Data Supplier Letter

It is a major step towards the implementation of EPOS’s legal project. The signed letter is a protocol stating that the agency owning the data agrees to make its GNSS data and metadata (site log files) available to EPOS and that these data can be disseminated under the Creative Commons 4.0 CC:BY license. The latter ensures that the data will be open access, in line with the guidelines of the European Commission. Foreseeing all legal aspects, once signed, this EPOS Supplier Letter guarantees that the name of the data supplier will be attached to the data, giving proper credit to the data source. Furthermore, one of the major benefits is that EPOS will validate the metadata and the GNSS data and provide feedback and the data supplier can install GLASS or get a license to send the data to an existing GLASS node from which the data will made it accessible for download from the EPOS GNSS data gateway. Last, but not least, it will be possible to get regular updates on who has been downloading the data.

Join us by signing the supplier letter  @ https://gnss-metadata.eu/Guidelines/EPOS-GNSS_Supplier_Letter.docx.

Procedure for including GNSS stations in  EPOS @ https://gnss-metadata.eu/Guidelines/EPOS-GNSS_Procedure_for_EPOS_Stations.pdf.

GLASS Software Contact

email: software@gnss-epos.eu