As for the high precision positioning of underwater targets, the GPS sonobuoy technique has two bottlenecks: high precision system clock synchronization and high accuracy time delay estimation.
为了实现水下载体高精度的定位，GPS声纳浮标需解决两个方面的技术难点：高精度的系统时钟同步和定位信号的高精度时延估计。
Clock synchronization services work by changing the system clock on the client systems to match the clock on the server system.
时钟同步服务通过把客户机系统上的系统时钟改成与服务器系统相匹配的时钟而起作用。
The problem of Clock Synchronization is a classical issue in distributed operating system and core technology in distributed computing.
时钟同步问题是分布式操作系统中的一个经典的问题，是分布式计算中的核心技术之一。
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