Double Star Programme (DSP)

This mission consists of two satellites, the equatorial satellite DSP-E (Tan Ce 1), following a 550 x 60 000 kilometre orbit, inclined at 28.5 degrees to the Equator and the polar satellite DSP-P (Tan Ce 2) following a 350 x 25 000 kilometre orbit inclined at 90 degrees to the Equator.