INSAT

例句：

1. 1. The INSAT satellite is used to provide navigation services.
   国际卫星导航系统用于提供导航服务。
2. 2. The INSAT system has helped improve the accuracy of navigation systems worldwide.
   国际卫星导航系统已经帮助提高了全球导航系统的准确度。
3. 3. The INSAT satellite can be used to track ships and aircraft in real-time.
   国际卫星导航系统可以实时追踪船只和飞机。