english: So we had to know the velocity of Rosetta much better than one centimeter per second, and its location in space better than 100 meters at 500 million kilometers from Earth.
non_english: Tako da smo morali znati brzinu Rozete bez odstupanja većeg od 1cm u sekundi i njen položaj u svemiru s odstupanjem manjim od 100m na razdaljini od 500 miliona km od Zemlje.