The ITU Radiocommunication Assembly considering that a) the radio spectrum and geostationary orbit are limited resources; b) that there is spectrum congestion in certain frequency bands allocated to the FSS; c) that due to the rapid development of different radio services, sharing conditions in many frequency bands are becoming increasingly difficult; d) that the spectral efficiency of satellite networks can be increased through the use of higher level modulationssuch as 8-PSK and 16-QAM as compared to QPSK; e) that the power efficiency of satellite networks can be improved through the use of appropriate encoding techniques; f) that there is a continuous need to update the information available on the characteristics of satellite transmissions and their related performance; g) that different transmission techniques can be implemented to transport the same information stream.