Abstract
In this paper, a new approach for the precise orbit determination technique, which is applicable to deep-space missions, is presented, instead of the conventional orbit determination system using RARR (Range And Range-Rate) data. In this approach, ΔVLBI (Delta Very Long Base-line Interferometry) data are employed together with supplemental range data. This technique is applied to a typical Marsian mission using simulation data and significant enhancement of precision in the orbit determination is demonstrated, compared to the conventional RARR method.