| Subject | German | English |
| transp. | erdsynchrone Umlaufbahn | earth-synchronous orbit |
| transp. | erdsynchrone Umlaufbahn | synchronous orbit |
| commun. | erdsynchrone Umlaufbahn | geosynchronous orbit (approx. 35900 km (22300 mi) orbital altitude, for 'stationary' satellites; the so-called ,Clarke' orbit, after Arthur C. Clarke, science fiction writer, who proposed this orbit in 1948) |