scope:

Although the standard reference patterns for FSS and BSS earth station antenna main-beam and side-lobe gain, such as those in Recommendations ITU-R S.465, ITU-R S.580, ITU-R BO.1213 or ITU-R BO.1900 among many others are adequate for many interference studies, cases sometimes arise where more detailed gain patterns for specific antennas, or antenna types are needed in ITU-R studies. Also, the gain data for particular antennas are used in the refinement of existing reference patterns and/or the development of new reference patterns. Annex 1 to this Recommendation details a format in which gain data on specific FSS and BSS earth station antennas may be submitted by administrations in electronic form, and includes examples. Annex 2 includes a format for the capture of measured gain data of earth station antennas when only elevation and azimuth data is available.