Real-Time GPS network facilitates geophysical studies



The Global Positioning System (GPS) is being widely used to monitor lithospheric processes with millimeter precision, which it achieves by correcting for signal delays induced by the ionosphere [Ho et al., 1996] and atmosphere [Businger et al., 1996]. Alternatively, uncorrected GPS data can be used to estimate properties of the ionosphere and atmosphere important to meteorology, climate, and space weather.