BD 1A, 1B, 1C, 1D

BD 1 [CAST]

BD 1 (Beidou 1) is a chinese satellite navigation system, which, in contrast to GPS and GLONASS, uses geostationary satellites. This reduces the number of satellites, but limits the coverage to a less than hemispherical area. The basic constellation requires 3 satellites. The satellites are reportedly based on the DFH-3 Bus.

The fourth satellite failed shortly after launch but was later reported to have been finally activated and entered service.