A collection of contributions from many experts from space research institutions in a joint US-Taiwan project, COSMIC - Application of Constellation Observing System for Meteorology, Ionosphere and Climate. The COSMIC project data complements other observing systems and aims to improve global weather analyses. These improved data analyses and forecasts will provide significant benefits to aviation and other industries that accurate meteorological forecast are needed . The COSMIC project is a science experience to demonstrate the utility of atmospheric limb surroundings from a constellation of eight low-earth orbiting satellites in operational weather prediction, space weather monitoring and space geodesy.