scope:

The present document applies to Satellite Interactive Terminals (SIT) and Satellite User Terminals (SUT) operating as part of a bi-directional satellite network. Satellite Terminal (ST) is used in the present document as a generic name that refers equally to a SIT and/or a SUT. In such a network a Network Control Facility (NCF) is responsible for the monitoring and control of the transmit functions of the STs. These STs have the following characteristics: -in the case of SITs reception is in the Fixed Satellite Service (FSS) frequency ranges from 10,70 GHz to 11,70 GHz and from 12,50 GHz to 12,75 GHz as well as the Broadcast Satellite Service (BSS) frequency range from 11,70 GHz to 12,50 GHz; in the case of SUTs reception is in the Fixed Satellite Service (FSS) frequency ranges from 19,70 GHz to 20,20 GHz and from 17,70 GHz to 19,70 GHz as well as the Broadcast Satellite Service (BSS) frequency range from 21,40 GHz to 22,00 GHz; -in all cases ST transmission is in the frequency band allocated to FSS from 27,50 GHz to 29,50 GHz; - STs transmit towards geostationary satellites with spacing down to 2° away from any other geostationary satellite operating in the same frequency band and covering the same area; - linear or circular polarization is used for transmission or reception; - the received signals may be analogue and/or digital; - the transmitted signals are always of digital nature; - the ST antenna diameter does not exceed 1,8 m, or equivalent corresponding aperture; - the ST is designed for unattended operations.