Technical criteria to be used in examinations relating to the probability of harmful interference between frequency assignments in the fixed-satellite service as required in No. S11.32A.1 of the Radio Regulations
The ITU Radiocommunication Assembly considering: a) that the Radio Regulations (RR) Nos. 1506, 1507 and 1508 call for examinations by the Radiocommunication Bureau (BR) with respect to the probability of harmful interference between frequency assignments in the fixed-satellite service; b) that to carry out such examinations guidance is needed to assist in the application of this Regulation; c) that it is essential to seek to prevent harmful interference from occurring in actual operation even though the examinations are carried out prior to frequency assignments being brought into use; d) that to coordinate frequency assignments administrations may use criteria of maximum allowable values of interference which, when satisfied by calculation prior to the frequency assignments being brought into use, ensure compatibility with relevant requirements for quality of service, availability and performance; e) that an examination pursuant to the provision of RR Nos. 1506, 1507 and 1508 should rely on measures, agreements and other factors that have during coordination been identified by the administrations as conducive to reducing interference and have been communicated to the BR; f) that while attempting to coordinate frequency assignments administrations may agree to use criteria of accepted interference, as defined in RR No.162, that would allow more severe interference than the maximum allowable values of interference to be tolerated yet still ensure compatibility ); g) that on the one hand the BR needs a means of quantifying the interference level in cases where a finding is required in accordance with RR No.1506, but on the other hand the term harmful interference is used elsewhere in the RR in contexts in which quantification is not appropriate.