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IGN Global Data Centre: Enhancing Geodetic Services

Explore how IGN's Global Data Centre meets user needs with real-time applications, FTP servers, and advanced technologies for precise geodetic data analysis. Learn about the progress made since its launch and ongoing improvements.

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IGN Global Data Centre: Enhancing Geodetic Services

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  1. IGN activities as IGS data center • The IGN Global Data Centre (GDC) has been designed and implemented in answer to both the Analysis Centers and the surveying user community requirements, for post-processing and real-time applications. • The IGN data center is handled by the geodetic and levelling department (SGN). • So as to have a more reliable data flow and a better availability of the service, two identical configurations have been setup in two different locations in IGN. Each configuration has : • FTP deposit server for data and analysis centers uploads, • FTP anonymous access to the GNSS observations and products, • Fully independent Internet links. • The infrastructure is common with the National GNSS permanent network and IDS data center activities. • Participation as GDC to the RTIGS Pilot Project IGS Workshop 2008, Miami Beach

  2. IGN GDC : system overview IGS Workshop 2008, Miami Beach

  3. IGN beginnings as « analysis center » • Project launched in 2007: production of ultra-rapid orbits and 30s clocks • Why ? • Rapid PPP (trajectography and validation of aerial photography flights) • Hourly troposphere estimations (E-GVAP) • How ? • Bernese GPS Software 5.0 • Many improvements still needed, and then validation • Results: • Products released every 2 hours since December 2007 • 30s clocks not yet available • Comparison with IGU and IGS products: encouraging IGS Workshop 2008, Miami Beach

  4. IGS ERP format • Extract of file sgu14823_14.erp: = June 4th, 2008 – 1h 55min 12sec ! MJD X-P Y-P UT1-UTC LOD S-X S-Y S-UT S-LD ... 54621.08 129403 537317 -4308507 4153 6 8 6 12 ... IGS Workshop 2008, Miami Beach

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