BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each.
Try to answer this question if possible (otherwise reply "unanswerable"): What were the BeiDou-1 system satellites based on?
the Chinese DFH-3 geostationary communications satellite