Open loop tracking for Yinghuo-1 Mars Orbiter

The 1st Chinese Mars Probe, Yinghuo-1, is planned to be launched in 2011, together with the Russian Phobos-Grunt landing mission. It will explore the space weather of Mars, and test the deep space communication and navigation equipment. Different from common deep space missions, astronomical Very Long Baseline Interferometry (VLBI), open loop tracking like DOR/DOD,seam beam VLBI and one-way Doppler measurements, will be used to determine the spacecraft orbit and position.