Improved GPS could quiet skies by changing flight patterns — but might take years to work.
For years, neighbors who live along the flight path to San Francisco International Airport have suffered — and complained — about airplane noise. Now the airport is testing a new way to battle the nuisance that is growing worse in many nearby cities: Precision navigation.
In the tight airspace of the Bay Area, “this enables landing patterns that wouldn’t be possible using less precise navigational aids,” said SFO spokesman Doug Yakel. “The broadcasted messages are giving ‘digital breadcrumbs’ to aircraft to follow a pathway into SFO.” “The potential is there. But we’re not achieving that potential,” said Marie-Jo Fremont of Palo Alto, where dozens of flights roar overhead every day.
“Now you have a lot more planes, doing a lot more things, that are closer to you,” said Landesmann. “It makes a very big difference.” “This transmitter talks to nearby satellites. It’s saying: ‘I know exactly where I am, where do you think I am?’,” said Yakel. “And from that minor difference, it will do calculations and it can send out corrected messages to aircraft.”
at the FAA is limiting the tool’s use to 10 miles from the airport so more distant cities like Palo Alto, Menlo Park and Los Altos won’t fully benefit.
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