Candidate model overview

All candidate models are available as the original submitted .dat files (containing coefficient error estimates) as well as converted .cof files compatible with the format of the previous IGRF-9 evaluation round.

A) DSRI/NASA/Newcastle models

Description of the models can be found at

www.dsri.dk/Oersted/Field_models/

IGRF-A1: Oersted and CHAMP data, linear and quadratic SV

IGRF-A2: Oersted and CHAMP data, linear SV

SV-A1-2005: Oersted and CHAMP data, linear and quadratic SV for 2005

SV-A2-2005: Oersted and CHAMP data, linear SV for 2005

SV-A3-2007.5: Oersted and CHAMP data, linear and quadratic SV for 2007.5

B) NGDC/GFZ models

Model descriptions in: Model-B-descriptions.pdf

IGRF-B1: CHAMP data, linear and quadratic SV

IGRF-B2: Oersted data, linear and quadratic SV

IGRF-B3: CHAMP and Oersted data, linear and quadratic SV

SV-B1-2007.5: CHAMP data, linear and quadratic SV for 2007.5

SV-B2-2007.5: Oersted data, linear and quadratic SV for 2007.5

SV-B3-2007.5: CHAMP, Oersted and Observatory data, linear and quadratic SV for 2007.5

C) BGS models

Model descriptions in: Model-C-descriptions.pdf

IGRF-C1: Ørsted, CHAMP and observatory hourly means, linear and quadratic SV

SV-C1-2007.5: Ørsted, CHAMP and observatory hourly means, linear and quadratic SV, application of linear prediction filters to long series of

observatory annual means also used

D) Izmiran models

Model descriptions in: Model-D-descriptions.pdf

IGRF-D1: CHAMP vector data, linear SV

SV-D1-2005: CHAMP vector data, linear SV