Preliminary study on the near equatorial magnetic field model and South Atlantic Anomaly

The geomagnetic field is generated inside its molten iron core as a result of a mixture of the electrical forces within the core, daily Earth's rotation, and its thermal movement. The purpose of the study is to build the model of the near equatorial magnetic field, studying the effect of South Atlantic Anomaly on the near equatorial satellites and analyzing the characterization of the geomagnetic field. The building of the model is important since it can provide a better result in a small area compare to a large area. In this research, 6 stations located near the equatorial region were selected. The stations chosen can be used in designing the model using spherical cap harmonic analysis. The result for this research is still preliminary stage. The model constructed will be tested, verified and validated. The well-verified model will be capable to predict the characteristic of the geomagnetic field and can be used to study the effect of South Atlantic anomaly on the near equatorial satellites.