(c) System providers should strive to monitor the performance of their open signals and provide timely updates to users regarding critical performance characteristics such as timing accuracy, positioning accuracy and service availability;
(c) 系统供应商应当努力监测其开放信号的性能，并及时向用户提供有关计时精度、定位精度和服务可用性等关键性能特征的新信息；