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cover of episode How GPS Works

How GPS Works

2025/2/27
logo of podcast Stuff You Should Know

Stuff You Should Know

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Josh
著名财务顾问和媒体人物,创立了广受欢迎的“婴儿步骤”财务计划。
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Josh: 我将解释GPS的工作原理,它是一个基于太空的无线电导航系统,由美国政府拥有和运营,全球有数十亿人每天使用。GPS系统由卫星、地面控制部分和用户接收器三部分组成。GPS的基本原理是通过无线电信号计算时间来确定位置,利用微波信号和原子钟来实现精确的定位。差分GPS通过地面固定天线来校正GPS信号的误差。三边测量法通过计算与三个或四个卫星的距离来确定位置,在三维空间中使用球体来计算位置。GPS的精度已经从最初的100米提高到现在的2米以内,但地球磁场变化和海洋洋流等因素会影响其精度。新一代GPS天线使用L1和L5频段来提高精度。GPS不仅用于导航,还用于农业、建筑和隧道挖掘等领域。GPS系统容易受到干扰和欺骗,甚至普通人都可以干扰它。美国正在通过增加L5卫星来更新GPS系统,以提高其安全性。 Chuck: 我将补充说明GPS的细节,包括卫星的轨道、信号的传输方式、以及不同国家和地区对GPS的应用。我还将讨论GPS的局限性,例如容易受到干扰和欺骗,以及如何提高GPS的精度和安全性。 Chuck: 我将补充说明GPS的细节,包括卫星的轨道、信号的传输方式、以及不同国家和地区对GPS的应用。我还将讨论GPS的局限性,例如容易受到干扰和欺骗,以及如何提高GPS的精度和安全性。同时,我还将分享一些关于GPS的趣闻轶事,例如GPS的命名由来、以及一些利用GPS作弊的案例。

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A tribute to Marshall Brain, the founder of HowStuffWorks, highlighting his contributions and impact on the podcast creators' careers.
  • Marshall Brain founded HowStuffWorks in 1998.
  • He was an electrical engineer and professor at NC State.
  • His aim was to make complex topics understandable for the general public.
  • Without him, the hosts of Stuff You Should Know might not have met.

Shownotes Transcript

In a tribute to the late founder of HowStuffWorks Marshall Brain, we chose one of his great articles. Learn all about how your phone knows how to get you around without bumping into stuff or running people over in this episode. Thank you, Marshall.

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