On December 27, 2012, Ran Chengqi, Director of the China Satellite Navigation System Management Office, announced the Beidou Satellite Navigation System Space Signal Interface Control Document - Public Service Signal B1I (version 1.0) at the press conference on the official provision of regional services by the Beidou Satellite Navigation System.
The Space Signal Interface Control Document of the Beidou Satellite Navigation System, also known as the ICD document, specifies the signal interface relationship between the Beidou Satellite Navigation System and user receivers. It is a necessary technical document for the development and manufacturing of receivers and chips. This document is available in both Chinese and English versions, and specific content can be found on the government website of the Beidou Satellite Navigation System.
It is reported that the released Beidou Satellite Navigation System Space Signal Interface Control Document - Public Service Signal B1I (Version 1.0) mainly includes an overview of the Beidou system, signal specifications, and navigation messages. It defines in detail the relevant content of the public service signal B1I between the Beidou satellite navigation system space constellation and user terminals.
