[Source: NASA AQUARIUS mission web site http://aquarius.nasa.gov/
[10-Jun-11] Aquarius/SAC-D rocketed into space at 7:20:13 AM PDT. Less than 57 minutes later it separated from the rocket's second ... stage and began communicating with ground controllers and unfurling its solar arrays.
Aquarius is a focused satellite mission to measure global Sea Surface Salinity (SSS). Scientific progress is limited because conventional in situ SSS sampling is too sparse to give the global view of salinity variability that only a satellite can provide. Aquarius will resolve missing physical processes that link the water cycle, the climate, and the ocean. Aquarius is planning to launch in 2011. Aquarius/SAC-D is a space mission developed by NASA and the Space Agency of Argentina (Comisión Nacional de Actividades Espaciales, CONAE.)