"Global Navigation Satellite Systems (GNSS) have become an essential technology used in navigation, positioning, and timing applications in meteorology, environmental monitoring, disaster management, and space exploration. This comprehensive book explores the various applications of GNSS technology in different fields of Earth and space observations and provides readers valuable insights into these emerging trends. It discusses the challenges that impact the performance of GNSS technology and offers solutions through several case studies on space weather and climate disasters, opening a different dimension of approaches in various paradigms of GNSS technology"--