GPS Groups/Gs There are many international and national groups involved in the deployment of GPS The international organization is the International GPs Service(IGs) Started as pilot project by the International Association of Geodesy(IAG)in 1992 Data collection(standards for stations) Data dissemination( through several archives Data analysis(IGS analysis centers) Analysis improvements(working groups and standards) 5/05/3 12.540Lec21 如m盟 mawl,da Current IGs Network(approximately 200 stations) 05/503 12540Lec21GPS Groups/IGS • There are many international and national groups involved in the deployment of GPS. • The international organization is the International GPS Service (IGS) • Started as pilot project by the International Association of Geodesy (IAG) in 1992. • Involves: – Data collection (standards for stations) – Data dissemination (through several archives) – Data analysis (IGS analysis centers) – Analysis improvements (working groups and standards) 05/05/03 12.540 Lec 21 3 05/05/03 12.540 Lec 21 4 Current IGS Network (approximately 200 stations) 2