The studies on the landing site choice for the returned spacecraft are described. The selection is based on the terrain areas field surveys results and the fuzzy sets theory application to analyse the results. The spatial information situation model is used as a basic model. A fuzzy information situation concept and model are introduced. The landing site choice is made on the criteria basis that is interval, that is, indistinct. The possible landing sites’ number is limited. Because of this, the global discrete optimization is replaced by an expedient local choice. The conditions for applying the method and their possible extension are described.

Topics
Spacecrafts, Fuzzy set theory
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