What are the functions of the Beidou satellite navigation system?

The Beidou system has powerful functions such as navigation, positioning, timing, and communication data transmission. It can provide global users with seven services including positioning, navigation and timing, global SMS communication, regional SMS communication, international search and rescue, satellite-based enhancement, ground-based enhancement, and precise single-point positioning. This is a powerful global satellite navigation system. Short message communication service is the unique skill of Beidou system. The short message function is a unique technological breakthrough of Beidou and is not available in the GPS system. The so-called short message means that the satellite positioning terminal and Beidou satellites or Beidou ground service stations can directly transmit information in two directions through satellite signals. Functionally, other satellite navigation systems can only position passively, so users can only know "where I am." Beidou users not only know where I am, but also tell others where I am and what I am doing. The Beidou system has created a unique communication and navigation integrated service model and is a veritable "generalist". On the basis of being fully compatible with the Beidou-2 short message communication service, the Beidou-3 global system can provide global short message communication services and regional Short message communication service. Among them, the global SMS communication service can design and activate SMS communication services for authorized users around the world, supporting 560 characters (40 Chinese characters) at a time; the regional SMS communication service can provide regional SMS communication services for users in China and surrounding areas, supporting the number of users from The original 500,000 has been increased to 12 million, and the sending capacity has been increased from the original 120 Chinese characters to 1,000 Chinese characters. Not only can text be transmitted, but also voice and pictures can be transmitted.