1、QUESTION ITU-R 243/7*Characterization of technical parameters and interference effects and possible interference mitigation techniques for passive sensors operating in the Earth exploration-satellite service (passive) (2006) The ITU Radiocommunication Assembly, considering a) that passive sensors ar
2、e used in the remote sensing of the Earth and its atmosphere by Earth exploration- and meteorological satellites in certain frequency bands allocated to the Earth exploration satellite service (EESS) (passive); b) that the products of these passive sensor operations are used extensively in meteorolo
3、gy, climatology, and other disciplines for operational and scientific purposes; c) that passive sensors operating in the EESS (passive) are sensitive to any emissions within their allocated band; d) that any emissions that raise the noise floor in bands allocated to the EESS (passive) may constitute
4、 interference to the passive sensors using those bands; e) that passive sensors may not be able to differentiate the wanted signal from the interference and that interference may not be identifiable in the passive sensor products; f) that in order to help protect passive sensors from interference it
5、 may be necessary for those sensors to employ interference mitigation techniques, further considering a) that Recommendations ITU-R SA.515, ITU-R SA.1028, and ITU-R SA.1029 provide general EESS (passive) operational characteristics, performance and protection, noting that a) Recommendation ITU-R SM.
6、1633 considers interference between EESS (passive) in certain bands in the range 1.4 to 52.8 GHz from certain active services in specific adjacent or nearby bands; b) Recommendation ITU-R SM.1542 provides some information regarding techniques that the EESS (passive) sensors may employ to mitigate un
7、wanted emissions, decides that the following Question should be studied 1 What are the range of applications and uses of passive sensors and its products? 2 What are the typical technical and operating characteristics of passive sensors that can be used for studies involving sharing and compatibilit
8、y? _ *In the year 2009, Radiocommunication Study Group 7 extended the completion date of studies for this Question. - 2 - 3 How can the degradation to passive sensor operations from all possible interference sources be characterized? 4 Can the degradation due to interference be identified in the pas
9、sive sensor and its products? 5 Are there mitigation techniques that can be employed by the passive sensors to protect their operations from degradation? further decides 1 that the results of the above studies should be included in one or more Recommendations and/or Reports; 2 that the above studies should be completed by 2010. Category: S2
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