CONTENTS

Annex 1 - A methodology for interference evaluation from the downlink of the FS using HAPS to the uplink of the FSS using GSO satellites within the band 27.5-28.35 GHz
1 Introduction
2 A methodology for interference evaluation
        2.1 Interference from a HAPS system
        2.2 Interference from multiple HAPS systems
        2.3 Downlink power control
        2.4 Input parameters
                  2.4.1 HAPS characteristics
                  2.4.2 FSS input characteristics
Appendix 1  to Annex 1 - An example of the application of the methodology of Annex 1
1 Interference model
2 HAPS characteristics
3 GSO satellite characteristics
4 Calculation results
Annex 2 - A methodology for the calculation of the e.i.r.p. transmissions from HAPS in the HAPS-to-ground direction within the band 27.5-28.35 GHz that would cause a given increase in the I/N of receivers of FSS geostationary satellites
1 Introduction
2 Description of the method
3 Interference levels from typical HAPS systems
Appendix 1  to Annex 2 - An example of the application of the methodology of Annex 2
1 Introduction
2 Interference to 2� beamwidth FSS hub station beams
3 Interference to 0.3� beamwidth FSS small user terminal beams
4 Interference levels from typical HAPS systems
Annex 3 - A methodology for C/I assessment from the HAPS-to-ground transmission (downlink) of the FS using HAPS to the Earth-to-space (uplink) of  the FSS using GSO satellites within the band 27.5-28.35 GHz
1 Introduction
2 A methodology for C/I assessment
        2.1 C/I calculation
        2.2 Calculation of off-axis angle
Appendix 1 to Annex 3 - An example of the application of the methodology of Annex 3
1 HAPS system parameters
2 GSO satellite system parameters
3 Calculation results
        3.1 Case 1
        3.2 Case 2
4 Summary