Dutch Permanent GNSS Array (DPGA)

The Dutch Permanent GPS Array (DPGA) consists of about 18 continuously operating GPS (and GLONASS) receivers in the Netherlands and a data and computing centre. The main purpose of the network is to to provide GNSS data to the International GNSS Service (IGS), EUREF Permanent GNSS Network (EPN), EUMETNET GPS water vapour programme (E-GVAP), and other national and international projects, and to facilitate research and educational applications.

Latest news

Four tide-gauges with continuously operating GNSS operated by NSGI have been added to the network. Data from HHO2 (Hoek of Holland) is available from May 2021. DHEL (Den Helder) and HARL (Harlingen) were installed on resp. June 2 and June 8 of this year. DELZ (Delfzijl) became operational just recently on 18th of August. [25 August 2022]

June 26, 2022, a new IGRS (Integrated Geodetic Reference Station) in Epen, South-Limburg, became operational. The station is co-located with an absolute gravity point and seismometers of KNMI. The station is installed on an underground concrete bunker, 7 meters in height (1 m below the surface), and on bedrock from the Carboon. The station was installed with the help of students during the GRS fieldwork in 2022. [30 June 2022]

May 1st, 2022, the RTCM3.1 NTRIP datastreams APEL0, DLF10, EIJS0, ... , WSRA0 (all NTRIP mountpoints with short 5 letter names XXXX0) will be terminated. Users of these NTRIP data streams are adviced to switch to the corresponding mountpoints XXXX00NLD0 which provide the same data in RTCM3.3 MSM format. [4 April 2022]

The receiver and antenna for DELF00NLD were replaced on February 24th 2022 with a multi-GNSS receiver. DELF00NLD is now providing highrate, hourly and daily RINEX-3 files and NTRIP data streams. [24 February 2022]

From now on all multipath, signal-to-noise and cycle slip statistics are based on daily RINEX-3 files. The statistics include GPS, Galileo, Glonass and Beidou systems. The old RINEX-2 statistics (GPS and Glonass only) will remain available until the last station has transitioned to RINEX-3 and after that as historic data. The visualisation of the statistics has been improved using dynamic charts which are refreshed once per day [25 Januari 2022]

March 1st 2022 [updated] we will stop dissiminating and archiving data in the legacy RINEX-2 format. Today, RINEX-3 (which was first released in 2007) is the preferred format for the exchange of GNSS data. Historic data will remain available in the RINEX-2 format, and for the past few years, data was available both in RINEX 2 and RINEX 3 to easy the transition. As of 1 March 2022, GNSS data will be available only in RINEX-3 format. This has been delayed by 2 months until the last station has switched to RINEX-3. [16 December 2021, 24 February 2022]

older news items...

GNSS Local Data Center Delft (GNSS-LDC-Delft)

The local data center in Delft provides data for the first order GNSS infrastructure in the Netherlands. The station setup and data is conform international standards. The stations fullfill different purposes: some of them are active reference stations (AGRS.NL), of which several are co-located with tide gauges along the North Sea coast, others are Integrated Geodetic Reference Station (IGRS) equiped corner reflectors for InSAR. Several stations are part of international networks, such as the International GNSS Service (IGS), Euref Permanent GNSS Network (EPN), and others; the data for these stations is forwarded to regional and global data centers

Ameland Apeldoorn Cabauw Zegveld Delft Eijsden Epen Eindhoven Kootwijk Rouveen Schiermonnikoog Terschelling Texel Ijmuiden Vlieland Vlissingen Westerbork Delfzijl Den_Helder Harlingen Hoek_van_Holland Singapore Click on a station to view station info.
[station information table]

High-rate, hourly and daily RINEX data from the Dutch Permanent GPS Array are available through this web site (http://gnss1.tudelft.nl/dpga/rinex) and anonymous ftp (ftp://gnss1.tudelft.nl):

Download daily RINEX files (30 sec) [ http | ftp ]
Download hourly RINEX files (30 and/or 10 sec) [ http | ftp ]
Download high-rate RINEX files (1 sec) [ http | ftp ]
The RINEX-3 files use long file names like DLF100NLD_20160610000_01D_30S_MO.crx.gz. For dates before March 1, 2022, data is (also) available in the legacy RINEX-2 format, these files use the old naming style with short names like dlf10610.16d.Z. Furthermore, highrate and hourly RINEX-3 data from before January 1, 2016, have been packed in daily zip files like DLF100NLD_2015256UUUU_01H_10S_MO.crx.zip and DLF100NLD_2015256UUUU_15M_01S_MO.crx.zip that can be found in the regular hourly and highrate RINEX repositories.

Many receivers are streaming data using the NTRIP protocol, either in RTCM-3, RAW data format, or both. For the NTRIP source table and mount points see

NTRIP source table (http://gnss1.tudelft.nl:2101).

Information on the stations, availability, latency, completeness and data quality can be obtained from the following links

Station information table with links to the meta data pages RINEX file statistics on availability, completeness and latency Dynamic charts with multipath, SNR and slip statistics
Station meta data can be obtained from the station information table or by clicking on one of the stations on the map to the left.

Tracking statistics for the legacy RINEX-2 files can be still be found on the teqc legacy RINEX2 statistics page. Receiver specific raw data files are available from within the Internet domain of the Delft University of Technology and for authorized users (who need to login using a username and password), and non-anonymous ftp.

Real-time data streams

Several receivers are currently streaming data using the NTRIP protocol, either in RAW data format, RTCM, or both. For the NTRIP source table see

NTRIP source table (http://gnss1.tudelft.nl:2101)
The naming convention for the mountpoints is
<STA4>0: RTCM 3.1
<STA4>00NLD0: RTCM 3.2/3.3 with MSM7 messages
<STA4>00NLD1: RAW data in the receiver proprietary format
The station coordinates in the RTCM messages are in ETRF2000, at epoch 2013-07-02 12:00, see the coordinates and velocities page for more information.

For more information on the data streams in general and their usage see the websites of EUREF real-time, NTRIP, Global list of real-time GNSS data streams from NTRIP and NASA Global Differential GPS system (GDGPS).

Coordinates and velocities

When it comes to coordinates and velocities of the GNSS reference stations there is not a single solution. Coordinates and velocities in various reference frames can be found coordinates and velocities page, with a short explanation.

Contributing networks

The stations are operated by the Delft University of Technology (DEOS) and its partners. The Active GPS Reference System for the Netherlands (AGRS.NL) is a subnet of the DPGA, and NTUS is operated jointly by DEOS and the Singapore Land Authority. More information on the contributing subnetworks and related applications is available on separate pages.

An overview of Permanent GNSS reference stations in the Netherlands is available from here.

For more information or questions contact Hans van der Marel.