The ITU Radiocommunication Assembly considering a)that the current 2002 edition of the Spectrum Monitoring Handbook describes direction- finding as the only terrestrial technique to locate transmitters and harmful interference;b)the trends in wireless communications towards higher frequencies, wider bandwidths, more complex modulation schemes and lower power levels are making radiolocation determination more problematic;c)that new alternative techniques and solutions for radiolocating transmitters (such as time difference of arrival (TDOA)) are now becoming available;d)that said techniques may offer advantages in accuracy and capability over direction finding in some situations.