Candidate models for the IGRF-11th generation making use of extrapolated observatory data

Research areas:
Year:
2010
Authors:
Journal:
Earth Planets Space
Volume:
62
Pages:
745-751
BibTex:
Abstract:
Three candidate models are produced in response to
the call for IGRF-11 models. A main field model
around epoch 2005.0 is based on one year of Ørsted
and CHAMP measurements, and is proposed for the
definitive model for epoch 2005.0. A main field
model around epoch 2009.5, based on two months of
CHAMP measurements and extrapolated to 2010.0, is
proposed as a main field model for epoch 2010.0. A
secular variation model valid for 2010.0~2015.0,
based on the extrapolation through exponential
smoothing of observatory monthly mean values, is
proposed as a predictive secular variation
model. Comparison of similar extrapolations made for
previous IGRF generations with actual observations
are presented and discussed.