top: our model computed from 130 days of Champ data centered on 2003.0; middle: POMME-3, Potsdam Magnetic Model of the Earth, centered on 2003.0; bottom: Difference of models.
It is useful to recall again that we are not computing an instantaneous field, but, at day t k,a field based on a data set extracted from 130 days of data centered at t k (for Champ).
It comprises of a sensor that touches the forehead to collect brain wave data centered at the frontal cortex, the contact and the reference points located on the ear pad.
We followed the same approach for building the 2010 Main Field and Secular Variation candidate models but selected CHAMP satellite data centered on 2009.0 and up to 12th August 2009.
Examples of optimal array {Q l } (black points) and close to optimal {P l } (red points) extracted from 130 days of data centered on at 2003.0 (a) N = 1000, (b) N = 3000.
The environment consists of three parts, an object-oriented data processing framework adopting a data centered architecture, a communication and data caching system based on the C/S paradigm, and data analysis and visualization software providing the 2D/3D experimental data display.
