M.S. Vorona1, A.A. Gusarov2, Yu.N. Kopalov3, A.Yu. Onufrey4

1–4 Military Space Academy named after A.F. Mozhaisky (Saint-Petersburg, Russia)

1–4 vka@mil.ru

To justify the requirements for the structure of the orbital grouping, the frequency ranges used and the types of signals, it is necessary to evaluate, among other things, the permissible energy potential values of earth stations of the fixed satellite service. This is due to the fact that fixed satellite service earth stations, on the one hand, are permanently installed in a given place or changing their location within a given zone by radioelectronic means, i.e. have the largest energy potential among satellite communication satellites. On the other hand, fixed satellite earth stations receive and transmit data via geostationary spacecraft in C (4/6 GHz), Ku (11/14 GHz) and Ka (20/30 GHz) frequency bands, which are widely used in existing and promising low-orbit satellite data transmission systems. Therefore, the task of improving the methodological apparatus for evaluating electromagnetic compatibility of user terminals of low-orbit satellite data transmission systems from fixed satellite service earth stations is urgent. A corresponding technique is proposed and an example of calculating the permissible energy potential of earth stations of a fixed satellite service is given. Allowable values of effective isotropically radiated power of earth stations of fixed satellite service were calculated to exclude unintended radio interference for various situations of location of earth stations, data transmission spacecraft and user terminal receiving data from spacecraft. The obtained method of evaluating electromagnetic compatibility of user terminals of low-orbit satellite data transmission systems with fixed satellite service earth stations enables to generate a visual representation of the results of calculating the permissible energy potential of fixed satellite service earth stations. The technique can be used in forming requirements for a domestic low-orbit satellite data transmission system.

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