2000 44 28 26407 2000-040A IIR NAVSTAR 49 USA 154 F1 10 | The radio signals are sent at two different L-band frequencies |
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This creates six orbital planes which completely surround the Earth | 2006 52 31 29486 2006-042A IIR-M NAVSTAR 59 USA 192 B4 17 |
GPS is operated and maintained by the U.
, GPS History, Chronology, and Budgets• Dick, Steven; Launius, Roger 2007 | Each group is assigned a different path to follow |
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1993 37 7 22657 1993-032A IIA NAVSTAR 33 USA 92 A1 26 | Washington, DC: US Government Printing Office |
gov is maintained by the National Coordination Office for Space-Based Positioning, Navigation, and Timing.
202001 54 18 26690 2001-004A IIR NAVSTAR 51 USA 166 B1 29 | 2004 61 2 28474 2004-045A IIR NAVSTAR 57 USA 183 C4 26 |
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These satellites send radio signals to Earth that contain information about the satellite | Johnson, Bobbie May 19, 2009 |