It was built as a part of the Copernicus Programme , and is the first of four planned Sentinel - 3 satellites .
Sentinel - 3A is a European Space Agency Earth observation satellite dedicated to oceanography which launched on 16 February 2016 .
Sentinel - 3A was built as a part of the Copernicus Programme , and is the first of four planned Sentinel - 3A - 3 satellites .
Sentinel - 3A is a European Space Agency Earth observation satellite dedicated to oceanography which launched on 16 February 2016 .