2楼这种不学无术又喜欢信口开河的民科,实在忍不住来抽脸
@冯仁不胜下面我复制的,是GPS官方网站上一篇关于介绍GPS系统的文章,原文是PDF,地址如下
http://www.gps.gov/cgsic/meetings/2011/mclefresh.pdf 。
最后一页也就是我黏贴的,提到了GPS系统如何根据相对论预测的那样由于高速运动与地面产生时差并且进行校正。希望你们即使看不懂英文,至少会用GOOGLE翻译,虽然我认为希望不大
How GPS Bends Time.
Einstein knew what he was talking about with his relativity discussions. Forproof, just look at your hand held GPS.
The global positioning system relies on 24 satellites that transmit time-stamped information on where they are in space. Your GPS receiver registers the exact time at which it receives that information from each satellite and then calculates how long it took for the individual signals to arrive. By multiplying the elapsed time by the speed of light, the unit can figure out how far it is from each satellite, compare those distances, and calculate its own position.
To achieve accuracy to within a few meters, the satellites’ atomic clocks must be extremely precise, within plus or minus 10 nanoseconds. Here’s where things get weird: Those amazingly accurate clocks never seem to run quite right once they are in space. One second as measured on the satellite never matches the same second measured on Earth, Just as Einstein predicted.
According to Einstein’s “Theory of Relativity”; A clock that’s traveling fast will appear to run slowly from the perspective of someone standing still. The GPS satellites move at about 9,000 mph, enough to make their onboard clocks slow down by 8 microseconds per day from the perspective of a GPS receiver and totally miscalculate the location data. To counter this effect, the GPS system must adjust each time single it receives from the satellites
上面这篇文章算是泛泛而谈,另外一篇则要详细的多,有图有数据有计算公式和结果,公式复制无力,直接贴图
原文地址:
http://www.gps.gov/governance/advisory/meetings/2011-11/nelson.pdf