Improving the Accuracy of the Martian Ephemeris Short-Term Prediction

Table 1

MEX orbital tracking data.

Types of tracking data	Observation time	Stations
Two-way Doppler	From 2009-08-07T20:40 to 2009-08-08T04:00(UTC)	NNO-NNO
Three-way Doppler		NNO-Shanghai,
		NNO-Kunming,
		NNO-Urumqi