A generalized high performance navigation system is provided using low earth orbit (LEO) satellites.

提供了一种使用近地轨道(LEO)卫星的通用化的高性能导航系统。

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However, be aware that the database system has to maintain these indexes and this, particularly for audit logging, slows down the overall performance of process navigation if audit logging is enabled.

但是，应该知道数据库系统必须要维持这些索引，并且该操作，尤其是对于审核的记录来说，在审核记录已启用的情况下会减慢整个系统的性能。

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It integrates a multi-GNSS location engine supporting GPS, Galileo, Glonass and Compass satellites to improve the navigation system performance in obstructed environments, Combined with SiRFDRive(R) dead reckoning software, the SiRFprimaII delivers seamless navigation experience whether driving in dense urban canyons or through tunnels or multistory parking lots.

ENGADGET: CSR sharpens indoor and in-car navigation with SiRFstarV, SiRFusion and SiRFprimaII