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New GPS satelllite, what is the fallout for GA ?
"While the new series has just begun to fly, the Air Force has the next generation
already in the works. The GPS 2F satellites are under construction at a Boeing plant in California. They will feature the original and the new modernized signals, plus offer a third civilian signal of particular interest to the aviation industry. A dozen of those satellites will be built, with the first launch anticipated in 2007 from the Cape." What are they talking about ? Do recievers need to be changed to obtain the better accuracy of the new satellites ? |
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Scott Moore wrote: "While the new series has just begun to fly, the Air Force has the next generation already in the works. The GPS 2F satellites are under construction at a Boeing plant in California. They will feature the original and the new modernized signals, plus offer a third civilian signal of particular interest to the aviation industry. A dozen of those satellites will be built, with the first launch anticipated in 2007 from the Cape." What are they talking about ? Do recievers need to be changed to obtain the better accuracy of the new satellites ? Existing receivers will not support the new frequencies and I doubt there'll be an option to retrofit them. No worries though, all birds will continue to be backwards compatible. 2007 is only a target date for the first bird to be launched. You won't see enough birds up there (18 is typically the minimum to ensure enough birds are in view at any time from any location) to support the availability requirements that aviation has. Don't expect to have to consider upgrading to an L5-compatible receiver until at least 201x The new civil signal on the IIFs is L5 while the IIR-M birds will offer L2C. From http://pnt.gov/FRP2001.pdf: "The U.S. Government has determined that two additional coded signals are essential for certain uses of GPS. A second civil signal will be added at the GPS L2 Frequency (1227.60 MHz). A third civil signal that can meet the needs of critical safety-of-life applications such as civil aviation will be added at 1176.45 MHz. The third civil signal frequency is designated as L5." Regards, Jon |
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