Theoretically, it is an optimal receiving for Loran-C signal, which can effectively reduce the interference from the white noise, because the Loran-C signal is already known.

从理论上讲，由于已知罗兰c信号的波形，采用这种方法是罗兰c信号的最佳接收，它能有效减少白噪声的干扰。

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Using the Multi-chains Loran-C signals to implement the independent UTC synchronization is the second approach, which is relied on the Coincidence Rule among TOCs of different Loran-C chains.

第二条途径是根据不同罗兰c链的TOC的重合规律，研究利用多链罗兰c信号实现自主toc同步。

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Supporters of LORAN say the nation's increasing reliance on GPS has ironically increased the importance of maintaining LORAN as a backup.

CNN: Navigation system, aid to farmers among budget cuts

Of the approximately 950 people who commented in the Federal Register about the future of LORAN as the Bush administration's decision was being made, the vast majority favored saving and improving LORAN, said Bob Lilley, secretary of the International Loran Association.

CNN: Navigation system, aid to farmers among budget cuts

Having LORAN in reserve makes the GPS satellite system a less attractive target for terrorists, they say.

CNN: Navigation system, aid to farmers among budget cuts