MAG SWE DAN - Magnetometer Stations Network covering Scandinavia and Greenland

MAG SWE DAN data is provided as part of the SWE Service Network’s General Data Services.
Access it via the SWE Data Browser or through HAPI.

The network

The MAG-SWE-DAN Network consists of 10 geomagnetic variometer stations located in Sweden, Denmark, and Greenland, operated and maintained by the Geological Survey of Sweden (SGU), and the Technical University of Denmark (DTU).

The MAG-SWE-DAN Network enhances the spatial coverage of the existing ground magnetometer observations over Scandinavia and Greenland. In addition, the 1-second time resolution of the MAG-SWE-DAN data allow to capture signals of intense short-lived geomagnetic activity, e.g. magnetic substorms. As the magnetic signature of these processes can be very local, a dense spatial coverage of observations is required. This guided the teams in the selection of locations of the stations during instrument installation activities.

The MAG-SWE-DAN magnetometer network provides 1-second data in Near Real-Time for geomagnetic conditions monitoring.
Each variometerstation is equipped with a FGE fluxgate magnetometer developed by DTU Space and electronics which allows to digitize the fluxgate signal. These electronics consist mainly of one analog-to-digital converter, a storage and processing computer and a cellular modem to transmit the data.

The Data

The data, of each station, is provided as 3-axis vector of magnetic field (B) in nT following the north-east-down (NED) system with the Cartesian coordinates (X North, Y East, Z Down). The associated timestamp is in expressed in UTC. The time resolution is 1 second provided with an approximatively 5-minute latency.
The Network data is divided in 10 datasets, one for each station.

Instruction for retrieving data via HAPI

The query string to retrieve the data via HAPI is a combination of a query root and one or more parameters such as time and data format. The query shall contain the root to the ESA Space Weather data, identifiers pointing to the MAG SWE DAN datasets, time selection and optionally data format. Please use the following instructions along with HAPI usage guidelines.

Please make use of the following root to build the data query:
https://swe.ssa.esa.int/hapi/data?id=spase://SSA/NumericalData/MAGSWEDAN/...

For each of the magnetometer stations, a different SPASE metadata identifier is available. Please find below the list of MAG SWE DAN stations with the associated SPASE identifier, location, and start date of the dataset.

The time selection and data format selection are two separate fields-values entries in the query string. Please use the Ampersand (symbol &) to separate each field-value pair. Within each pair, please use the Equal sign (symbol =) between field and the associated desired value.

The table below displays the keys adopted to make the time selections and the format of their values.

The data is provided by default in csv format. When the data selection is adopted in the query string, it is possible to request a desired data format. The key and a list of existing data format values is provided in the table below.

Please find below an example of a complete query including time and data format selection:
https://swe.ssa.esa.int/hapi/data?id=spase://SSA/NumericalData/MAGSWEDAN/magswedan_FKP&time.min=2023-01-21T12:00:00Z&time.max=2023-01-21T12:05:30Z&format=json