[1] The atmospheric limb sounding technique making use of radio signals transmitted by the Global Positioning System (GPS) has already proven to be a promising approach for global atmospheric measurements. In this study, we assess for the first time the potential of GPS radio occultation soundings for detecting the migrating diurnal tide. Retrieved temperatures between 10 and 30 km in the tropi...

[1] We analyze 2 years of the FORMOSAT-3/COSMIC GPS radio occultation data to study the response of the Earth’s ionosphere to the solar rotation (27-day) induced solar flux variations. Here we report electron density variations in the ionosphere ( 100–500 km) associated with the 27-day solar cycle. The peak-to-peak variation in electron density at low latitudes in the F2 region is about 10–10 e...

GPS-to-low-earth-orbiting (LEO) radio occultation (RO) geometries are designed for vertical-plane measurements. Reconstruction of atmospheric and ionospheric pro…les is facilitated by the planar geometry. Interpreting scintillation that develops over the extended propagation path is more challenging. The point of closest approach is a natural reference for reporting scintillation on occultation...

In real soundings of the Earth’s atmosphere, it has been found that the phase and amplitude of the signal received undergo strong oscillations at altitudes above the neutral atmosphere and below the Elayer of the ionosphere. This ionospheric scintillation effect is a consequence of multipath propagation resulting from inhomogeneities in the refractivity field of the ionosphere. Ionospheric scin...

GPS/MET observations of the tropical atmosphere of the southern hemisphere (5S to 25S) during February 1997 are analysed, when a high amount of convective tropospheric water vapor is at these latitudes. Enhanced gravity wave activity of the lower stratosphere at h=22-28 km is associated to areas of increased tropospheric water vapor pressure at h=4-6 km, regarded as a measure of tropical convec...