High Definition Geomagnetic Model

Changelog

November 15, 2022
- Main field and secular variation update valid until December 31, 2023i
- Updated the main field models from 2021 to 2023
- Incorporated 9 years of data from Swarm satellite mission
- Improved Dst forecasting using MagNet ensemble modeling
- Updated diurnal magnetic variations model (DIFI-7) in HDGM-RT
- Software updates and bug fixes

November 15, 2021
- New, improved coverage map
- Incorporated 8 years of data from the Swarm satellite mission
- Main field and secular variation update valid until December 31, 2022
- Updated main field model from 2020 to 2022
- Updated diurnal magnetic variations model (DIFI-6) in HDGM-RT

November 12, 2020
- New crustal field derived from EMAG2v3 crustal anomaly grid
- Incorporated 7 years of data from the Swarm satellite mission
- Main field and secular variation update valid until December 31, 2021
- Updated main field model from 2014 to 2021 with a combination of Swarm, DMSP, Cryosat and CHAMP data

November 14, 2019 (HDGM-2020):
- Incorporated 6 years of data from Swarm satelite mission
- Main field and secular variation update valid until December 31, 2020
- Updated HDGM-RT with improved nowcasting of magnetic disturbance field
- Updated main field model from 2002 to 2020 with a combination of Swarm, DMSP, Cryosat and CHAMP data

November 15, 2018 (HDGM-2019):
- Incorporated almost 5 years of data from the Swarm satellite mission
- Main field and secular variation update valid until December 31, 2019
- Implemented ionospheric DIFI-4 model within the HDGM-RT package
- Easy access to the Earth Magnetic Anomaly Grid (EMAG2v3) map from HDGM GUI software

December 11, 2017 (HDGM-2018):
- Incorporated over 3 years of data from the Swarm satellite mission
- Main field and secular variation update valid until 2019.0
- Implemented ionospheric DIFI-3 model within the HDGM-RT package
- Improved and streamlined documentation

March 6, 2017 (HDGM-2017):
- Incorporated over 3 years of data from the Swarm satellite mission
- Main field and secular variation update valid until 2019.0
- Implemented ionospheric DIFI-2 model within the HDGM-RT package

March 17, 2016 (HDGM-2016):
- Incorporated over 2 years of data from the Swarm satellite mission
- Main field and secular variation update valid until 2018.0
- Implemented HDGM-RT Real-Time Disturbance model as an optional addition to the standard HDGM package

March 17, 2015 (HDGM-2015):
- Incorporated over 1 year of data from the Swarm satellite mission
- Main field and secular variation update valid until 2017.0
- Retroactive updates of models for 2010-2014 using new Swarm data
- Extended main field model back to 1900, so now HDGM covers all time periods 1900-present
- Updated external disturbance field prediction for 2015

May 7, 2014 (HDGM-2014):
- Incorporated data from DMSP satellites for 2010-2014 models
- Main field and secular variation update valid until 2016.0
- Updated external disturbance field prediction for 2014