K An equivalent thermal noise temperature Annex 2, § 2 T dB A thermal noise equivalence factor for Annex 2, § 2 W interfering emissions in the reference bandwidth dB Nominal correction at frequency 1, § 4.4 X(f) f (f) dB/km Correction constant at frequency 1, § 4.4 f  Exponent for determining the specific Appendix 2, § 3 attenuation due to rain TABLE 12 (end) Parameter Without Without With Definition Reference subscript subscript argument degrees An azimuth angle measured at the Appendices 3, 4 and 6  coordinating earth station The path-dependent incidence of ducting Appendix 1, §3  e % The percentage of time for clear-air Annex 1, § 4.1 anomalous propagation conditions exist dB/km A specific attenuation Appendices 1 and 2 A parameter related to the path-dependent Appendix 1, §3 1 incidence of ducting dB Additional attenuation due to scatter outside Appendix 2, §3 2 the common volume km The horizontal distance to the centre of the Annex 1, § 5 d circular propagation mode (2) contour from Appendix 2, § 4 the earth station, along the azimuth of the earth station main beam axis  degrees A difference in longitude measured from an Appendices 3 and 4 earth station  degrees An elevation measured from the earth Appendices 2, 3 and station location 4 and Annex 2 degrees A parameter equal or related to the latitude of 1, § 4.1, the earth station Appendices 3 and 4 rad(1) The mean anomaly or its rate of rotation Appendix 4, § 3 d degrees An angle used in the construction of the Appendix 7, § 2 propagation mode (2) auxiliary contour M The wavelength of the interfering power Appendices 3 and 7 degrees(1) A longitude parameter or its rate of change Appendix 4, § 3 km3/s2 The Earth gravitational constant Appendix 4, § 3  A parameter used to determine Appendices 1, § 3 
T K An equivalent thermal noise temperature Annex 2, § 2 W dB A thermal noise equivalence factor for interfering emissions in the reference bandwidth Annex 2, § 2 X(f) dB Nominal correction at frequency f 1, § 4.4 (f) dB/km Correction constant at frequency f 1, § 4.4  Exponent for determining the specific attenuation due to rain Appendix 2, § 3 TABLE 12 (end) Parameter Without subscript Without subscript With argument Definition Reference  degrees An azimuth angle measured at the coordinating earth station Appendices 3, 4 and 6  The path-dependent incidence of ducting Appendix 1, §3 e % The percentage of time for clear-air anomalous propagation conditions exist Annex 1, § 4.1 dB/km A specific attenuation Appendices 1 and 2 1 A parameter related to the path-dependent incidence of ducting Appendix 1, §3 2 dB Additional attenuation due to scatter outside the common volume Appendix 2, §3 d km The horizontal distance to the centre of the circular propagation mode (2) contour from the earth station, along the azimuth of the earth station main beam axis Annex 1, § 5 Appendix 2, § 4  degrees A difference in longitude measured from an earth station Appendices 3 and 4  degrees An elevation measured from the earth station location Appendices 2, 3 and 4 and Annex 2 degrees A parameter equal or related to the latitude of the earth station 1, § 4.1, Appendices 3 and 4 rad(1) The mean anomaly or its rate of rotation Appendix 4, § 3 d degrees An angle used in the construction of the propagation mode (2) auxiliary contour Appendix 7, § 2 M The wavelength of the interfering power Appendices 3 and 7 degrees(1) A longitude parameter or its rate of change Appendix 4, § 3  km3/s2 The Earth gravitational constant Appendix 4, § 3  A parameter used to determine Appendices 1, § 3
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