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Table 2 Summary of DGRF-2010 candidate models submitted to IGRF-12

From: Evaluation of candidate geomagnetic field models for IGRF-12

DGRF candidate models for main field epoch 2010

Team

Model

Organization

Data

Comments (parent model etc.)

A

DGRF-2010-A

BGS

Ørsted; CHAMP; Swarm A, B, C;

Based on parent model using order 6 B-splines

   

Observatory hourly means

with 1 year knot spacing

B

DGRF-2010-B

DTU Space

Ørsted; CHAMP; SAC-C; Swarm A, B, C;

Based on CHAOS-5

   

Observatory monthly means

using order 6 splines with 6 months spacing

C

DGRF-2010

ISTerre

Ørsted; SAC-C; CHAMP; Swarm B

Based on COV-OBS.x1

   

observatory monthly mean

using order 4 B-splines with 2 year spacing

D

DGRF-2010-D

IZMIRAN

CHAMP 2009.0-2010.75

Spherical Harmonics for each day

   

no data selection but numerical filtering

then linear regression centered on 2010.0

E

DGRF-2010-E

NGDC-NOAA

CHAMP

Based on parent model using quadratic expansion

F

DGRF-2010-F

GFZ

CHAMP from 2009.0 to 2011.0

Based on parent model using order 6 B-splines

  

USTHB/EOST

observatory hourly means

with 6 month spacing

G

DGRF-2010-G

NASA/GSFC

Ørsted; CHAMP; SAC-C

Based on CM5

   

observatory hourly means

using order 5 B-splines with 6 month spacing