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#1
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WAAS fasing in
Misschien hebben wij hier ook nog wat aan.
HERNDON, Va. (Reuters) - The United States on Thursday began phasing in a highly precise $2.5 billion satellite navigation system meant to open up thousands of existing runways to pilots, even in bad weather. Approaches to more than 200 U.S. airports have been mapped for the new "Wide Area Augmentation System," or WAAS, which will pinpoint vertical and horizontal locations to within about 1.5 meters (yards), the Federal Aviation Administration said. With more reliable satellite signals "thousands of runways will be available to pilots even in very poor weather," FAA Administrator Marion Blakey told reporters at the facility in Virginia, which monitors U.S. air traffic. This will translate into shorter routes, less fuel burned, less noise and a reduced impact on the environment. The improved signal from Global Positioning System satellites also will help maritime users, surveyors and others who need a more precise navigation tool, FAA officials said. "I won't tell you that WAAS is going to cure cancer, but I am telling you that it has great (benefits) across a wide array" of applications, said Blakey. The system is initially targeted at smaller airports that can ill-afford the estimated $2 million needed for the ground-based beacons currently used to guide runway approaches. It feeds satellite signals to "ground reference stations" which are linked so any errors in the signals can be corrected. The system, for which Raytheon Co was the prime contractor, is projected to cost $1.2 billion by 2006, when full operational capability is to be achieved. The current Global Positioning System signal is typically accurate to within seven to 10 meters, compared to 1 to 1.5 meters with the new system, FAA officials said. |
#2
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Oh, ik dacht dat ze dat al lang hadden, maar misschien was dat wel nog in de testfase. In Europa hebben we er helaas niet veel aan, maar wij hebben weer EGNOS. Dat is nog steeds in de testfase. Ergens in 2004 (ik geloof april) zou dat ook live moeten gaan.
1 a 1.5 meter is misschien ook wel wat overdreven. Of ze moeten een beter systeem hebben dan EGNOS. Volgens mij is de "standaard nauwkeurigheid" daarvan 3. |
#3
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1 1/2 of 3 meter, in combinatie met ILS (instrument landing system) ruim voldoende om een 'zachte' landing te bevorderen.
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#4
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Verbetert hij eigenlijk nog wat aan de hoogtemeting?
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#5
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Ja, tot iets van 5 meter.
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