that compatibility with existing services allocated on a primary basis in the frequency range d) GHz must be ensured when introducing any new HAPS designations, that the band 21.4-22 GHz is also allocated to the mobile service on a co-primary basis; e) f) that Recommendation ITU-R P.618, data and prediction methods required for the “Propagation design of Earth-space telecommunication systems”, should be used to determine rain attenuation from HAPS platforms. recognizing that RR No. 5.532 requires that the use of the band 22.21-22.5 GHz by the Earth a) Satellite (passive) and space research (passive) services shall not impose constraints upon the fixed and mobile, except aeronautical mobile, services; that HAPS is defined in No. 1.66A of the Radio Regulations as a station located on an object at an b) altitude of 20-50 km and at a specified, nominal, fixed point relative to the Earth, and is subject to No. 4.23, that the band 21.4-22 GHz is also allocated to mobile service on a co-primary basis; c) resolves that for the purpose of protecting fixed service systems in neighboring administrations in the band 21.4-22 GHz, the power flux density level per HAPS platform station produced at the surface of the Earth in neighboring administrations shall not exceed the following pfd mask in dBW/m2/MHz, under clear sky condition, without the explicit agreement from the affected administration: where El is the elevation angle in degrees (angles of arrival above the horizontal plane). To verify the compliance with the pfd mask the following equation shall be used: where: distance in meters between the HAPS and the ground (elevation angle dependent); d platform nominal EIRP spectral density in dBW/MHz at a specific elevation angle; is the flux density at the Earth’s surface per HAPS platform station in pfd(El) dBW/m2/MHz. rain attenuation in dB (ITU-R P.618) rain fade
d) that compatibility with existing services allocated on a primary basis in the frequency range GHz must be ensured when introducing any new HAPS designations, e) that the band 21.4-22 GHz is also allocated to the mobile service on a co-primary basis; f) that Recommendation ITU-R P.618, “Propagation data and prediction methods required for the design of Earth-space telecommunication systems”, should be used to determine rain attenuation from HAPS platforms. recognizing a) that RR No. 5.532 requires that the use of the band 22.21-22.5 GHz by the Earth (passive) and space research (passive) services shall not impose constraints upon the fixed and mobile, except aeronautical mobile, services; b) that HAPS is defined in No. 1.66A of the Radio Regulations as a station located on an object at an altitude of 20-50 km and at a specified, nominal, fixed point relative to the Earth, and is subject to No. 4.23, c) that the band 21.4-22 GHz is also allocated to mobile service on a co-primary basis; resolves that for the purpose of protecting fixed service systems in neighboring administrations in the band 21.4-22 GHz, the power flux density level per HAPS platform station produced at the surface of the Earth in neighboring administrations shall not exceed the following pfd mask in dBW/m2/MHz, under clear sky condition, without the explicit agreement from the affected administration: where El is the elevation angle in degrees (angles of arrival above the horizontal plane). To verify the compliance with the pfd mask the following equation shall be used: where: d distance in meters between the HAPS and the ground (elevation angle dependent); platform nominal EIRP spectral density in dBW/MHz at a specific elevation angle; pfd(El) is the flux density at the Earth’s surface per HAPS platform station in dBW/m2/MHz. rain fade rain attenuation in dB (ITU-R P.618) Satellite
IWG-2_078r2_AI_1_14_clean.docx