This paper presents the navigation analysis executed as part of the MARSNET phase A feasibility study. In the current mission baseline of MARSNET, several entry vehicles are assumed to be delivered to Mars by a common...
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This paper presents the navigation analysis executed as part of the MARSNET phase A feasibility study. In the current mission baseline of MARSNET, several entry vehicles are assumed to be delivered to Mars by a common cruise spacecraft (multiprobe scenario). The achievable landing accuracy as a function of the different tracking types, and of the probe targeting and separation strategies, has been studied. In multiprobe and single probe mission scenarios landing accuracies of less than 100 km can be achieved using quasar-relative differential very long baseline Interferometry (Delta VLBI) ground tracking. By means of differential VLBI tracking of the approaching spacecraft relative to a spacecraft in orbit around Mars, this delivery error can be reduced to less than 30 km.
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