Launch of the Sentinel-3B was originally planned for March with Vega rocket. Mission was swapped with Sentinel-2B mission planned utilization of Rockot launch vehicle probably in the end of the first half of 2017. Sentinel-3B is remote sensing satellite designed by Thales Alenia Space with utilization of Prima Bus. Spacecraft weighs around 1200 kg and is equipped with various observation devices, powered by two deployable solar arrays and onboard batteries. It will remain for at least 7 years on 815 km SSO orbit.