Visibility Analysis of X-ray Pulsar Navigation

The influent factors,which should be considered in the analysis of X-ray pulsar visibility,were summarized.The calculation formulas of pulsar elevation angle and the shelter from the three-body were also presented.According to the requirement of navigation,fifty X-ray pulsars were selected based on the rules of pulsar selection.The change of visible pulsar number with position,time,height were analyzed through calculations.The change of visibility of a single pulsar in a single day and the shelter from sun and moon were studied.Finally,conclusion is drawn.