Figure 1From: Global distribution of the migrating terdiurnal tide seen in sporadic E occurrence frequencies obtained from GPS radio occultationsNumber of radio occultations as a function of latitude from 2007 to 2012. Shown are 3-monthly (December to February) count rates measured by the FORMOSAT-3/COSMIC satellites over all longitudes, covering 10° around the given mean latitude, shifted by 5°.Back to article page