Satellite observatories Sun 6 Astrophysics 4 Buildings 4 Chaos theory 4 GPS 4 Geomagnetic field 4 Geomagnetic fields 4 Geomagnetic variation 4 Geomagnetism 4 Geostationary operational environmental satellites 4 Geostationary satellites 4 Ionosphere 4 Kinematics 4 Magnetic fields 4 Magnetohydrodynamics 4 Magnetohydrodynamics (MHD) 4 Observatories 4 Random processes 4 Solar cycle 4 Solar flare 4 Spectroscopy 4 Stochasticity 4 Sun: magnetic fields 4 Sun: sunspots 4 Agulhas Current 2 Agulhas current 2 Agulhas retroflection region 2 Altimeter data 2 Austral summers 2