1、QUESTION ITU-R 222-2/3Measurements and data banks of ionosphericcharacteristics and noise(1990-1993-2000-2000-2009)The ITU Radiocommunication Assembly,consideringa) that measurements of signal characteristics and of the ionosphere as a propagation mediumare essential for the further improvement of m
2、ethods of radiowave propagation prediction;b) that various organisations and agencies maintain databanks of measurements of ionosphericcharacteristics;c) that measurements of signal characteristics, useful for the evaluation of prediction procedures,etc., may not be consistently collected in databan
3、ks elsewhere,decides that the following Questions should be studied1 What characteristics of the ionosphere, of signal propagation through or via the ionosphereand of noise are appropriate for inclusion in databanks maintained and developed by ITU-RStudy Group 3?2 What data collection, analysis, sta
4、ndardization, compilation and dissemination proceduresare best suited for ITU-R purposes?further decides1 that Radiocommunication Study Group 3 should develop and maintain databanks ofmeasurements of ionospheric propagation, of ionospheric characteristics and of noise identified inanswering this Question;2 that the above studies should be completed by 2012.Category: S2
