Libro

Descripción

Climate change and weather dynamic is the cross-cutting issue all over the world. For developing countries, especially, for East Saharan African countries including Ethiopia, the backbone of the economy depends on agriculture and accurate weather information is demanding. Most of the weather information is obtained from traditional surface meteorology stations. The weather information obtained from this station is not accurate enough, had recording bias, and had lacked in a digital data center. The main objective of this research is to estimate and retrieve atmospheric parameters such as precipitable water vapour (PWV) using ground-based GPS and remote sensing techniques such as GPS Radio Occultation (RO) for accurate weather studies and forecasting. The specific objective of this work was to estimate the regional vertical Total Electron Content (vTEC) densities, using a linear combination of L1 and L2 carrier phase for higher-order time delays at different thin-shell layers of the ionosphere over GPS stations in Ethiopia.