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