Space Cooperation: Gravity Recovery and Climate Experiment (GRACE) Mission
Memorandum of understanding signed November 13 and December 10, 1998; entered into force December 10, 1998.
Agreement amending and extending the memorandum of understanding. Signed February 26 and 27 and March 16, 2009; entered into force March 16, 2009.
Agreement extending the memorandum of understanding, as amended and extended. Signed December 16, 17, and 18, 2009; entered into force December 18, 2009.
Agreement signed June 10, 2010; entered into force June 10, 2010.