Thales Alenia Space Germany, DLR, and SES TechCom, a subsidiary of SES, have signed a long-term agreement for the joint development of the first European space-based Automatic Dependent Surveillance Broadcast (ADS-B) constellation to monitor and optimize air traffic control around the globe. The agreement follows the successful launch of the ADS-B payload developed by DLR, which is currently operated on board the Proba 5 satellite and continuously provides global ADS-B data to the mission processing and analysis center developed and operated by SES TechCom.