OPUS I, M3 Time marks (x,*) are given every 48.0 hours 28 south - north [km] -200 0 west - east [km] + : Startposition x: a94004, sd= 14 m, 26.11.1993 13:40 - 5. 1.1994 *: a94005, sd= 18 m, 26.11.1993 13:40 - 9. 1.1994 18:40 (UTC) 1 1:40 (UTC)