Visibility research of X-ray pulsar-based navigation for interplanetary explore

X-ray pulsar-based navigation as a complete independence and high precision navigation method could be used for interplanetary exploration. How to choose pulsars will ultimately decide its feasibility, because pulsars visibility is a problem. Firstly, the paper computed the angles among pulsars, space probes and celestial bodies to research the visibility in geometry way, concluded a united pulsars visible solution for planets eclipse and the Sun jamming, and then built navigation pulsars choice priority criterion in the absolute localization. Secondly, state transition matrix was introduced to research real time visibility when space probe's attitude moving disturbed detector pointing. Finally, the paper researched the situation of communication link affecting by celestial body location between two probes and concluded the feasibility time of using relative navigation. These researches on building navigation pulsars choice criterion in visibility will be a foundation of using X-ray pulsar-based navigation for interplanetary explore.