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History of the Delta Launch Vehicle



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13-May-05 | “Modernized” GPS delayed

The launch of the first NAVSTAR IIR-M for the Air Force’s Global Positioning System has been delayed indefinitely for unspecified reasons. In all, eight IIRs will be converted into IIR-Ms, which add a second signal for civilian use and two new encrypted signals for military use. The “M-Code” signals, scheduled to be fully operational by 2010, will have increased power and reduced vulnerability to signal jamming.


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