g**1
发帖数: 10330 | 1 http://www.theregister.co.uk/2011/01/20/unavailabe_gps_warning/
FAA to pilots: Expect 'unreliable or unavailable' GPS signals
Unspecified Pentagon 'tests' cited
Posted in Government, 20th January 2011 21:15 GMT
The US Federal Aviation Administration is warning pilots to expect
“unreliable or unavailable” signals from their global positioning gear
as a result unspecified tests being carried out by the Department of
Defense.
The Notice to Airmen, or NOTAM (PDF) said the GPS tests will be carried
out beginning Thursday and are expected to last through February 22.
They will cause spotty GPS signals in a several hundred mile radius
centered off the coast of Florida.
A second NOTAM (PDF) warns of similar GPS disruptions centered in
Southern California Nevada around the same period.
“Pilots are highly recommended to report anomalies during testing to the
appropriate [Air Route Traffic Control Center] to assist in the
determination of the extent of GPS degradation during tests.”
During the effective period, test events will be active for 45 minutes
followed by 15 minutes of off time.
It's not clear if GPS apps in smartphones and car navigation systems
will be affected. We're guessing they will. Readers who know for sure
are encouraged to leave a comment |
|
