这是GNSS出品的一个用来下载RTCM格式的语句到GPS接收器的辅助定位的工具，Linux下源码

更改版本，能够接受gps,glonass,beidou的实时数据流-Able to accept real-time data streams gnss

We want to send SV info to ULP to help it in determining GNSS signal strength ULP will forward the SV reports to HAL without any modifications. -We want to send SV info to ULP to help it in determining GNSS signal strength ULP will forward the SV