DEOS Permanent GNSS Array (DPGA)

The DEOS Permanent GPS Array (DPGA) consists of about 15 continuously operating GPS (and GLONASS) receivers and a data and computing centre. The main purpose of the network is to facilitate research and educational applications, and to provide GNSS data to the International GNSS Service (IGS), EUREF Permanent GNSS Network (EPN), and others.

Contributing sub-networks and related applications

International GNSS Service

There are three IGS stations in the Netherlands, Kootwijk (KOSG), Westerbork (WSRT) and the IGLOS (GLONASS) station in Delft (DLFT), and a station in Singapore (NTUS) operated jointly with Nanyang Technological University (NTU). The first two use the AoA Turbo Rogue SNR-12 ACT receiver with Dorne-Margolin chokering antenna's. The receiver in Delft is a JPS Legacy (Topcon) tracking both GPS and GLONASS satellites. The receiver in Singapore is a LEICA GRX1200 PRO GPS+GLONASS receiver. The receivers are operated by the TU Delft. For more information see International GNSS Service Central Bureau.

Active GPS Reference System for the Netherlands

The Active GPS Reference System (AGRS.NL)is an initiative of the TU Delft, the Kadaster and Survey Department of Rijkswaterstaat, which was built in 1996 with support from the Netherlands Geodetic Commission. The exploitation of the AGRS.NL is in the hands of the Kadaster and Survey Department. They use the AGRS.NL for the maintenance of the Dutch reference frame and for certifying other Dutch GPS providers. The TU Delft is responsible for research and educational applications of the AGRS.NL network. The data is free of charge, although not openly available on the Internet. The AGRS.NL is composed of stations in Apeldoorn (APEL), Delft (DELF), Eijsden (EIJS), Terschelling (TERS) and Westebork (WSRA). The network uses Trimble 4700's. For more information see the RD-NAP site (in Dutch).

EUREF Permanent GPS Network (EPN)

The AGRS.NL stations in Delft (DELF), Eijsden (EIJS) and Terschelling (TERS), and IGS stations in Kootwijk (KOSG) and Westerbork (WSRT), are also part of the EUREF Permanent GPS Network (EPN).

GNSS Meteorology (COST716, TOUGH, CESAR, E-GVAP)

The AGRS.NL network is participating in the European COST-716 Action "Exploitation of Ground Based GPS for Numerical Weather Prediction and Climate Applications" and the European TOUGH project. The TU Delft operates also a few supplementary receivers for meteorological research. We have a Trimble 5700 with Zephyr antenna in Cabauw (CABW) at the CESAR site and until 2003 a JPS Legacy in Eindhoven (EIND). These instruments are co-located with various meteorological sensors. For more information and the latest estimates of Integrated Water Vapour (IWV) see EUMETNET GPS water vapour programme (E-GVAP).

SBAS and Internet Based Global Differential GPS

The TU Delft also operates a EGNOS Monitoring station in Delft on behalf of Eurocontrol and a IGDG Tracking Station for JPL.

Future plans and invitation for more permanent stations

In the near future several more receivers are expected to be installed for various projects of the TU Delft. Apart from the receivers that we operate ourselves, we would very much like to extend our network with as many receivers as possible. This includes third party receivers for which we can take care of the data flow, monitoring and archiving.

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For more information or questions contact Hans van der Marel.