Fig.1 BDS Satellites Health

The data above (Fig. BDS Satellites Health) was collected and integrated by iGMAS global tracking stations. The definition of satellite health status refers to the D1 navigation message in "Satellite Autonomous Health Identification (SatH1)" on the 22nd page of "BDS Spatial Signal Interface Control Document (ICD) Service Publicity Signal B1I (Version 2.1) ".