The horizontal component of the off-axis from Station 1 is related to the location of Station 2 relative to Station 1’s antenna boresight direction (Table A provides definition of Station 1 and 2). The off-axis angle of Station 2 from Station 1’s antenna boresight in is given by the equation: (A1.1) where: : Horizontal component of antenna’s off-axis angle θh : Station 1 azimuth (direction of Station 1’s antenna relative to north, in degrees, ΘS1 where 0 < 360) ≤ ΘS1 : Azimuth of Station 2 relative to Station 1 (direction of Station 2’s location from ΘS1,S2 the location of Station 1, relative to north in a clockwise direction, in degrees, where 0 ≤ < 360) ΘS1,S2 Table . Definitions of Station 1 and Station 2 to be used in calculating θh. Off-axis angle to be calculated Interference scenario Receive antenna off-axis angle Transmit antenna off-axis angle Station 1 = station Station 1 = terrestrial station Earth station receive, Station 2 = terrestrial station Station 2 = Earth station Terrestrial station transmit Also see Appendix 3 Station 1 = terrestrial station Station 1 = station Earth station transmit, Station 2 = Earth station Station 2 = terrestrial station Terrestrial station receive Also see Appendix 3 The resulting value of must be less than or equal to 180°. If > 180°, then must be θh θh θh adjusted by the following equation: (A1.2) The direction of Station 2 as viewed from Station 1 circle azimuth bearing) is given by the equation:
The horizontal component of the off-axis from Station 1 is related to the location of Station 2 relative to Station 1’s antenna boresight direction (Table A provides definition of Station 1 and 2). The off-axis angle of Station 2 from Station 1’s antenna boresight in is given by the equation: (A1.1) where: θh : Horizontal component of antenna’s off-axis angle ΘS1 : Station 1 azimuth (direction of Station 1’s antenna relative to north, in degrees, where 0 ≤ ΘS1 < 360) ΘS1,S2 : Azimuth of Station 2 relative to Station 1 (direction of Station 2’s location from the location of Station 1, relative to north in a clockwise direction, in degrees, where 0 ≤ ΘS1,S2 < 360) Table . Definitions of Station 1 and Station 2 to be used in calculating θh. Interference scenario Off-axis angle to be calculated Receive antenna off-axis angle Transmit antenna off-axis angle Earth station receive, Terrestrial station transmit Station 1 = station Station 2 = terrestrial station Also see Appendix 3 Station 1 = terrestrial station Station 2 = Earth station Earth station transmit, Terrestrial station receive Station 1 = terrestrial station Station 2 = Earth station Station 1 = station Station 2 = terrestrial station Also see Appendix 3 The resulting value of θh must be less than or equal to 180°. If θh > 180°, then θh must be adjusted by the following equation: (A1.2) The direction of Station 2 as viewed from Station 1 circle azimuth bearing) is given by the equation:
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