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为啥手机这都从2g到要5g了,定位技术怎么0进步?

posted by wap, platform: SONY Z1
引用:
原帖由 @klites  于 2016-7-4 22:53 发表
民用级别不会给你精确定位,我之前接触一个地勘的项目有说到
http://www.gps.gov/systems/gps/modernization/sa/
In May 2000, at the direction of President Bill Clinton, the U.S government discontinued its use of Selective Availability in order to make GPS more responsive to civil and commercial users worldwide.
The United States has no intent to ever use Selective Availability again.


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