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RECOMMENDATION ITU-R BO.1212 - CALCULATION OF TOTAL INTERFERENCE BETWEEN GEOSTATIONARY-SATELLITE NETWORKS IN THE BROADCASTING
ANNEX 1 - Calculation of total interference
APPENDIX 1 TO ANNEX 1 - Derivation of the relative alignment angle   for linear polarization
1 Definition of principle and cross-polarized components of a linearly polarized radiowave
    1.1 Vector transformation among rectangular, cylindrical and spherical coordinate systems
    1.2 Alternative definitions of principal polarization and cross-polarization reference directions
2 Coordinate system descriptions and transformation matrices
    2.1 Symbol notation
    2.2 The Earth-centred system Rg
    2.3 The wanted earth station system Rp
    2.4 The interfering earth station system Rp2
    2.5 The wanted satellite antenna coordinate system Ra
    2.6 The interfering satellite antenna coordinate system Ra2
3 Calculation of polarization angles and relative alignment angles
    3.1 Calculation of relative alignment angle Bd for the downlink case
    3.2 Calculation of relative alignment angle Bu for the up link case