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At the end of the launch sequence, Proba-2 is ejected from the Breeze upper stage of the Rockot launcher. At this point the SMOS satellite has already been ejected.
Proba stands for PRoject for OnBoard Autonomy. The Proba satellites are among the smallest spacecraft ever to be flown by ESA, but they are making a big impact in the field of space technology. Proba-2 is the second of the series, building on nearly eight years of successful Proba-1 experience.