11. A common characteristic of all the orbits was that the ground track nearly repeated every few days. 12. He said the spacecraft could have come in at a number of points along its ground track . 13. For military operations, the ground track repeat can be used to ensure good coverage in combat zones. 14. They are established for airports where terrain and related safety factors dictate a specific ground track be flown. 15. The ground track of fallout from an explosion depends on the weather from the time of detonation onwards. 16. Line S4 runs in the east-west direction from Unna to Dortmund-Luetgendortmund on above ground tracks through the station. 17. A faster change in the received frequency indicates that the beacon is closer to the satellite's ground track . 18. But its ground tracks were never less than 50 miles apart, which was why Haxby's map was relatively crude. 19. This phenomenon allows for ground tracks which cross over themselves, as in the geosynchronous and Molniya orbits discussed below. 20. The ground track of the descending craft passed over the station on its way to land in Inner Mongolia.
