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An IGRF candidate main geomagnetic field model for epoch 2000 and a secular variation model for 2000–2005
... 2.1.1 Observatory data The present geographical distribution of observatories is still unbalanced between the Northern and the Southern hemispheres, and obviously be- tween the continental and oceanic regions. Further ... See full document
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Candidate main field models for the Definitive Geomagnetic Reference Field 1995 0 and 2000 0
... of IGRF (previously IGRF 2000), main-field candidate models relied on spatially incomplete datasets, resulting in errors that were too large to be ig- ...a model for epoch ... See full document
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Main field and secular variation candidate models for the 12th IGRF generation after 10 months of Swarm measurements
... the main field and secular variation candidate models for the 12th generation of the International Geomagnetic Reference Field ...parent model, in which the ... See full document
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Stochastic forecasting of the geomagnetic field from the COV OBS x1 geomagnetic field model, and candidate models for IGRF 12
... CHAOS-4 field model (CHAOS-4plus_V4, Olsen et ...our IGRF-12 candidate models, the Swarm data used were ESA Level 1B oper- ational data from 26th November 2013 to 17th August 2014 (baseline ... See full document
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A candidate secular variation model for IGRF 12 based on Swarm data and inverse geodynamo modelling
... core field and its secular variation are fed to the numerical model at a single ...the geomagnetic field over historical to archaeological time scales, essentially because the ... See full document
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Ionospheric and induced field leakage in geomagnetic field models, and derivation of candidate models for DGRF 1995 and DGRF 2000
... the IGRF defined by IAGA, we proposed a candidate model for DGRF 1995 and two candidate models for DGRF ...These candidate models, the derivation of which is described in the present ... See full document
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Evaluation of candidate geomagnetic field models for the 10th generation of IGRF
... generation IGRF a total of seven main-field (MF) candidate models for ...linear secular- variation (SV) candidate models for ...The candidate models were sub- mitted by ... See full document
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Evaluation of candidate geomagnetic field models for IGRF 11
... International Geomagnetic Reference Field (IGRF) was agreed in December 2009 by a task force appointed by the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group ... See full document
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New parameterization of external and induced fields in geomagnetic field modeling, and a candidate model for IGRF 2005
... (secular variation and acceleration, ...of secular acceleration at degree n = 1, model 09d contains less power compared to model 09a, which may in- dicate that the coefficients of ... See full document
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The CHAOS 3 geomagnetic field model and candidates for the 11th generation IGRF
... generation IGRF defined by IAGA, we propose a candidate model for the DGRF 2005, a candidate model for IGRF 2010 and a candidate model for the mean ... See full document
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On the possibility of extending the IGRF predictive secular variation model to a higher SH degree
... International Geomagnetic Reference Field (IGRF) is a reference mathematical model of the Earth’s main mag- netic field, presented in terms of Gauss coefficients up to degree and order 13 ... See full document
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Candidate main field models for producing the 9th generation IGRF
... the epoch 1995.0 prior to main-field model derivation, using annual secular-variation models prepared by BGS from observa- tory and other ... See full document
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A 2015 International Geomagnetic Reference Field (IGRF) candidate model based on Swarm’s experimental absolute magnetometer vector mode data
... the model on October 1, 2014) could be used to build a very valuable candidate model for the ...International Geomagnetic Reference Field (IGRF). A parent model was first ... See full document
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An estimate of the errors of the IGRF/DGRF fields 1945–2000
... The secular variation coefficients, which are applicable for up to 5 years, are at present given to ...the main-field coeffi- ...the secular variation co- efficients at n = 8, so ... See full document
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Determination of the IGRF 2000 model
... and secular variation was neglected when estimating the models since the data span only a few ...the model) due to various problems, especially with blinding of the star ...combined model, the ... See full document
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The 2000 revision of the joint UK/US geomagnetic field models and an IGRF 2000 candidate model
... The model is intended to characterise only that portion of the Earth’s magnetic field originating from the Earth’s ...a main-field model for epoch ...predictive ... See full document
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Spatial temporal modeling of the geomagnetic field for 1980–2000 period and a candidate IGRF secular variation model for 2000–2005
... There is a difference between the chosen epoch XXXX.0 for the majority of data and that of WMM92.5. But taking into account the errors of both WMM92.5 and DGRF 1980, estimated as a few tens of nT each, the effect ... See full document
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Prediction of geomagnetic field with data assimilation: a candidate secular variation model for IGRF 11
... from 2000 to 2009 are calculated from CHAOS- 2s field ...from 2000 to 2005 (solid line with squares) and 7-year mean SV from 2000 to 2007 (solid line with ...Since IGRF-9 includes data ... See full document
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Westward drift in secular variation of the main geomagnetic field inferred from IGRF
... the field can be uniquely ...in IGRF models (for instance, IGRF1945–1955, (Xu, 2000, 2002)) will seriously distort the distribution of the component fields, but they have less significant effects on ... See full document
7
Improving the modelling of the geomagnetic main field: Isolating the average ionospheric field in satellite data
... In Figs. 4 and 5 we compare model spot values calcu- lated for the observatories shown in Fig. 3 with the aver- age of the observatory hourly-mean perturbations in January 1980, in afternoon and morning local time ... See full document
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