History and partnerships
ISRO announced the Chandrayaan-1 mission in 2003 and in spring 2004, expressed interest in cooperation with ESA. A Cooperative Agreement was signed between two agencies, and entered into force in June 2005.
Chandrayaan-1 is led by ISRO. ESA is coordinating the provision of three European instruments, has provided support in areas such as thermal design and flight dynamics, and is providing support for data archiving and processing. Other partners include Bulgaria and the USA.
