Abstract:

In order to solve the problem of low space object interception rate by use of common radar search fence, a high interception rate seamless search method is proposed on the basis of periodicity of transit. Space target can be intercepted by search fence at least once at transiting, when the longitude coverage of search fence is greater than or equal to the repeat longitude difference of the target. Based on this characteristic, by optimizing the antenna elevation angel and the dwell time of beam positions, the space and energy distributions of search fence are changed to make the longitude coverage equal to the repeat longitude difference of the space objects in each orbit height, so the high interception rate search is realized with the least time resource expenditure. Numerical simulations have shown that the proposed seamless search method can increase the mean interception rate from 90.93% to 99.94%, compared with the common search method under the condition of the same time resource expenditure. The research in this paper has the high application value in enhancing the search efficiency of space surveillance radars.

Key words: Space object, Repeat longitude difference, Seamless search, Interception rate