| 21. | Moonwatch complemented the professional system of satellite tracking stations that Fred Whipple organized around the globe.
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| 22. | Tenants such as Bigelow Aerospace maintain a small satellite tracking station on the grounds as well.
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| 23. | The radar-tracking station in the Czech Republic would also be part of the missile defense shield.
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| 24. | In addition, some ground tracking stations were closed following the 1991 collapse of the Soviet Union.
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| 25. | There is also a French satellite tracking station.
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| 26. | The ESA Maspalomas Tracking Station was also used to transmit signals to and from the probe.
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| 27. | The tracking station was closed in the mid-1970s.
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| 28. | The capsule's progress through the skies was relayed by teletype from one tracking station to another.
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| 29. | The telemetry was picked up at the Air Force Missile Test Center's ( AFMTC ) tracking station.
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| 30. | The operating architecture consists of two control nodes, eight tracking stations, 15 antennas, and two transportable vehicles.
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