The GCOS (Global Climate Observing System) Upper-Air Network (GUAN) consists of stations selected from the Global Observing System of the World Weather Watch. TSP is a joint partnership between MetService and U.S. GCOS established in 2004. The goal of the program is to provide a technical support and program management solution to ensure that upper air programs that are part of the GUAN and operated in the Pacific Island States are effective.