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The BGS Geomagnetism Team produces software for viewing, analysing and checking geomagnetic data collected by the International Real-time Magnetic Observatory Network (Intermagnet). IMCDview works with data in Intermagnet Archive Format (IAF - https://www.intermagnet.org/data-donnee/formatdata-eng.php) and provides the ability to view and export the data to other formats, as well as display metadata about observatories. The GM_Convert software is a tool dealing with conversion between a wide range of data formats that are common in the Geomagnetic community. The DataCheck1s program allows you to make comparisons between 1-minute and 1-second Geomagnetic data.

Data for use with IMCDview can be obtained from Intermagnet data publications:

From 2015 onwards the entire definitive data set from Intermagnet is updated and published annually. This data set is called the Intermagnet Reference Data Set (IRDS). For more information see the Intermagnet web pages: https://intermagnet.github.io/

By downloading this software you agree to the terms and conditions for BGS Intermagnet Software Downloads.

Available Software Downloads

Before using the programs listed below (including the Intermagnet Software Installer) you will need to install a Java Virtual Machine on your computer. You will need a minimum of version 11 of the Java Virtual Machine. There are many places where you can find the neccessary Java Runtime Environment (JRE). BGS use Java Virtual Machines from Eclipse Adoptium for development of Java software.

Intermagnet Software Installer

A program that will install one or more of the programs IMCDViewer, GM_Convert and DataCheck1s on your computer. The installer will optionally create shortcuts in your start menu and on your desktop to run the programs that you choose to install.

The installer requires a java virtual machine to be installed on your computer before it will run. Having downloaded the installer from the links to the right, either double click on the downloaded file to run it, or open a command line tool, move to the directory containing the downloaded file and type:

                    java -jar <jar-file>

where "jar-file" is the name of the file you downloaded.

VersionDownloadRelease Notes
13 IntermagnetBGSInstaller-13.jar ReleaseNotes-13.txt
12 IntermagnetBGSInstaller-12.jar ReleaseNotes-12.txt

IMCDViewer (jar file)

IMCDViewer graphically displays Intermagnet data time series for minute, hour, daily, monthly and annual means. The user can navigate between observatories, dates and components. There is some facility to import data in alternative formats, however GM_Convert is the preferred way to do this.

VersionDownloadRelease Notes
1.98 imcdview-1.98.jar ReleaseNotes-1.98.txt
1.97 imcdview-1.97.jar ReleaseNotes-1.97.txt
1_95 imcdview-1_95.jar  

GM_Convert (jar file)

GM_Convert allows for conversion between the following geomagnetic data formats: IAGA2002, Intermagnet Format (IMF), Internagnet CDF format, Intermagnet Archive Format (IAF), and World Data Centre format (WDC). Two interfaces are provided to the software, the first a graphical interface (in the form of a conversion "wizard"), the second a command line interface allowing conversions to be automated in scripts.

VersionDownloadRelease Notes
1.8 gm_convert-1.8.jar ReleaseNotes-1.8.txt
1.6 gm_convert-1.6.jar ReleaseNotes-1.6.txt

DataCheck1s (jar file)

The DataCheck1s software allows comparisons to be made between 1-minute data and 1-second data from the same observatory. The 1-minute data is considered a reference data set for the comparison and is expected to have been previously checked by other methods. Support for input formats is limited (IAF for 1-minute data, IAGA-2002 for 1-second data).

VersionDownloadRelease Notes
1.51 DataCheck1s-1.51.jar ReleaseNotes-1.51.txt
1.5 DataCheck1s-1.5.jar ReleaseNotes-1.5.txt
1.3 DataCheck1s-1.3.jar ReleaseNotes-1.3.txt
1.2_02 DataCheck1s-1.2_02.jar ReleaseNotes-1.2_02.txt

IMCDViewer (full installer)

This old version of the IMCDViewer installer does not require a Java virtual machine to run, as it will install one for you. BGS is no longer updating the full installer for IMCDViewer. This is the last version of IMCDViewer that will have a full installer built for it. This download contains version 1.97 of IMCDViewer bundled with version 11 of Java. For current versions of the IMCDViewer software, download the "Intermagnet Software Installer" or the IMCDViewer jar file.

IMCDViewer (full installer)