Automatic near real-time processing of GPS-data

The image shows a block diagram with the components of the system for the automatic processing of GPS-data, inclusive the GTS-function for the automatic determination of displacement vectors. The component functions are listed in the blocks. The data flows between them are symbolized by arrows.
Figure 1: Design of the system for the automatic processing of GPS-data (inclusive GTS-function, for the automatic determination of displacement vectors) (C. Falck, GFZ)

The use of GNSS technologies for early warning tasks requires not only the use of high-quality GNSS receivers and antennas, but also careful yet rapid data processing of the GNSS raw data, which can only be achieved through automatic data processing. Within the scope of the GITEWS project, an automatic GNSS data processing system was developed and integrated by GFZ for the Indonesian Tsunami Early Warning System (INATEWS) in Jakarta (Figure 1). This system has been in operation there since the end of 2008.

The image shows the workplace of the GPS-experts at the Indonesian tsunami early warning center in Jakarta with a collage of screen contents from the three left of in total six visible computer monitors. These show the latest results of the automatic determination of co-seismic displacements (Ground Tracking System) on a map, the status of the automatic GPS data processing system and the GPS-station network performance over the last 24 hours, displayed by color-coded bars.
Figure 2: Workplace of the GPS-experts at the Indonesian tsunami early warning center in Jakarta; In this example the three leftmost screens show the latest results of the automatic determination of co-seismic displacements (Ground Tracking System), the status of the automatic GPS data processing system and the GPS-station network performance over the last 24 hours. (C. Falck, GFZ)

One component of the newly developed system is the web-based, graphical user interface (Web-GUI), which enables easy-to-use monitoring of the GNSS networks and the automatic GNSS processing system itself. This means that the warning center operators (Figure 2) can see at any time and from any location with internet access whether all system components are functioning properly or whether the performance is somehow restricted.

Project partners:

  • BMKG (Meteorology, Climatology and Geophysics Agency, Jakarta, Indonesia)

Time frame:

  • 2005 -2011

Funding:

  • German Federal Ministry for Education and Research (BMBF), Grant 03TSU01

Project related publication:

  • Falck, C., Ramatschi, M., Subarya, C., Bartsch, M., Merx, A., Hoeberechts, J., Schmidt, G. (2010): Near real-time GPS applications for tsunami early warning systems. - Natural Hazards and Earth System Sciences (NHESS), 10, 2, 181-189. https://doi.org/10.5194/nhess-10-181-2010
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