СПОСІБ ВИБОРУ ДОСТУПНИХ КОСМІЧНИХ АПАРАТІВ ЗА УМОВАМИ ГЕОМЕТРИЧНОЇ ВИДИМОСТІ МІЖ НИМИ ТА ЗАДАНИМ РАЙОНОМ ЗЕМЛІ

Abstract

Under the warfare conditions in the east of Ukraine the problem of providing the command with space shooting information is gaining topicality. With respect to the absence of national means for solving these tasks, ordering and purchasing the space shooting information from foreign operators appears the only practical way of gaining the above information. It is noteworthy, that the market of these services is well-developed, this the problem of the reasonable formation of orders for shooting appears topical. The paper suggests a unique method for selecting available foreign space vehicles for the Earth’s remote sensing with the aim of using their target information for the benefit of the Armed Forces of Ukraine. The method is based on the advance calculations of the prognosticated coefficients of the temporal and spatial coverage of the Earth’s designated areas by the inspection zone of the space vehicles selected, comparing them with the requirements of the target information ordering customers, as well as on choosing the most appropriate options on this basis. The visibility conditions of the Earth’s designated area by the determined space vehicle at a given calendar date are formalized. Along with it the instrument of logical functions of the geometric visibility is used. Besides, the author suggests the mathematical instruments for the calculating the area of the designated territory of shooting in case of its description by the polygon of arbitrary shape with respect to the excess of this spherical polygon. The author also develops the mathematical model for determining instant shooting area on the spherical Earth by the pyramid coverage zone of the space vehicle under the in roll deviation of the sight axis of the onboard target equipment. The directions for the further research in general, and determining the physical conditions of monitoring the designated shooting areas in particular, are suggested.