The Geomagnetic Virtual Observatories (GVO) is a project in response to Swarm DISC (Data, Innovation and Science Cluster) ITT 2.1 "Geomagnetic Virtual Observatories based on Swarm data".

In this project, GVO data series are derived from Swarm data collected around target locations. The GVO data product consists of time series of vector magnetic field values at fixed locations, on a uniform grid at satellite altitude. Such data, regularly distributed in space and time are suitable for modelling the main geomagnetic field, for core flow inversion studies, and for data assimilation studies of the core dynamo process.

GVOs are designed to make Swarm data more accessible to researchers studying the physics of the core dynamo process, and related phenomenon such are secular variation, geomagnetic jerks and rapid core dynamics. The GVOs data product also provide valuable information to those interested in investigating magnetospheric and ionospheric magnetic signals on timescales of months and longer.

GVO time series including all field contributions, and those processed to isolate the core field, are available along with estimated errors.

Documentation

Download project documents:

• Swarm GVO product description
• Swarm GVO processing algorithm description
• Swarm GVO validation report

More information about Geomagnetic Virtual Observatories project

Project duration: June 2019 – June 2020. Project funded by ESA via the Swarm DISC, Sub-Contract No. SW-CO-DTU-GS-121.