g***j
发帖数: 40861 | 1 【 以下文字转载自 Joke 讨论区 】
发信人: xiaopo (小破), 信区: Joke
标 题: 南加州今天的GPS被干扰了
发信站: BBS 未名空间站 (Tue Jun 7 20:34:10 2016, 美东)
似乎是军方的实验...
The article says it only affects GPS above 50ft AGL, so would assume any
ground based GPS receivers are not going to have any issues. - Reddit user
http://www.avweb.com/avwebflash/news/GPS-Interference-NOTAM-For-Southwest-226365-1.html
A Notam is warning operators of “all aircraft relying on GPS” of
widespread GPS outages starting Tuesday throughout the Southwest and
especially southern California. Although the FAA doesn’t go into detail, it
seems the military is testing something that can disrupt GPS over a huge
area, centered on China Lake, California, home of the Navy’s China Lake
Naval Weapons Center. On Tuesday, June 7, the FAA is warning that GPS
signals down to 50 feet AGL could be “unreliable or unavailable” between 9
includes the L.A. Basin, Bay area and Las Vegas. There will be further
outages of similar potential duration June 9, 21,23, 28 and 30. The circles
expand with altitude and at 40,000 feet the interference will affect a
circular area of the Southwest 950 nautical miles across, reaching central
Oregon, Colorado and New Mexico.
The tests will potentially knock out all GPS-reliant services including WAAS
, GBAS and, notably, ADS-B. The FAA also doesn’t want a lot of radio
chatter about the outages and is urging pilots to report them if they need
help from ATC. Operators of Embraer Phenom 300 business jets are being urged
to avoid the area entirely. “Due to GPS Interference impacts potentially
affecting Embraer 300 aircraft flight stability controls, FAA recommends EMB
Phenom pilots avoid the … testing area and closely monitor flight control
systems,” the Notam reads. | j******z
发帖数: 3028 | |
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