Probability distribution of space debris impact azimuth

High-velocity impacts of the spaces debris threaten the safety operation of the long life and large size spacecraft, that can in turn lead to significant damage and catastrophic failure. First use the existing space debris environment models, and according to the actual needs of the project, calculate the object flux; then use object flux to represent the distribution of the relative velocity and get the probability density of impact velocity, further with a piecewise linear interpolation method to obtain the expression of the impact velocity probability distribution function; and calculate the probability distribution of impact azimuth by the use of the impact velocity probability distribution function in the end. © 2015 Beijing Institute of Technology.