基于北斗的RDSS终端测试工具，支持标准的北斗4.0协议，可自收自发短消息、请求定位信息、时间信息，可修改零值参数、查询版本等功能。(Based on Beidou RDSS terminal test tool, it supports the standard Beidou 4 protocol. It can collect spontaneous short messages, request location information and time information, and can modify zero value parameters, query version and so on.)