The ITU Radiocommunication Assembly considering a)that the data transmission characteristics of meteorological satellite systems, frequencies and bandwidths, and performance, interference and frequency sharing criteria are established by Recommendations ITU-R SA.514, ITU-R SA.1025, ITU-R SA.1026, ITU-R SA.1027, ITU-R SA.1159, ITU-R SA.1160 and ITU-R SA.1161.