Table of Contents
Annex1Methodologyfordeterminingstatisticsofshort-term
interferencebetweenco-frequency,codirectionalnon-GSO
FSSsystemsincircularorbitsandothernon-GSOFSS
systemsincircularorbitsorGSOFSSnetworks
1Methodandsimulationapproachdescription
2Simulationassumptions
2.1Orbitmodel
2.1.1Discussion
2.1.2Perturbations
2.2Considerationofpolarizationisolation
2.3Operationalassumptions
2.3.1Non-GSOearthstationslocation
2.3.2Trackingstrategy
2.3.3Powercontrolonrange
2.3.4Traffic
2.4Antennaparameters
2.4.1GSOearthstationantennaparameters
2.4.2Non-GSOspacestationantennaparameters
2.4.3GSOspacestationantennapatterns
2.5Inputdata
2.5.1Orbitparameters
2.5.2Antennaparameters
2.5.3Operationalandcomputationalparameters
2.5.4Frequencytobeusedfortheassessmentof
interference
2.6Outputdata
2.7Calculationofthetotalsimulationtime,simulationtime
incrementandprecession
2.7.1Introduction
2.7.2Simulationtimeincrement
2.7.3Precessionandtotalsimulationtime
2.7.4Dualtimestepsizes
Annex2Methodologyfordeterminingstatisticsofcodirectional,
co-frequencyinterferencelevelsbetweennon-GSOFSS
systemshavingcircularorbitsandGSOFSSnetworksin
frequencybandsbelow30GHz
1Introduction
2Interferencescenario
3Terminology
3.1Earthrelatedconstants
3.2Non-GSOsatellitesystemspacestationrelatedconstants
3.3GSOsatellitenetworkspacestationrelatedconstants
3.4Earthstationrelatedconstants
4Interferencecomputation
4.1Step1:Worst-caseidentification
4.2Step2:Interferencecalculationsatworstcase
4.2.1Uplinkinterferencecomputation
4.2.2Downlinkinterferencecomputation
5Methodtocomputetheaggregateinterferingnoisepowerfrom
asinglenon-GSOsystem
5.1Methodtocomputetheinterferenceontheuplink
5.2Methodtocomputetheinterferenceinthedownlink
5.2.1MonteCarlomethodforchoosingGSOgroundstation
locationsandtheirassociatedGSOsatellitecoverage
Annex3Descriptionandexampleofcomputationalmethodologyin
Annex1
1Introduction
2Descriptionofcomputationmethodology
2.1BlockA-Constellationselectionandset-up
2.2BlockB-Initializeprogramconstants
2.3BlockC-Positionconstellationtotimet
2.4BlockD-Checkvisibilityofsatellites(interferingand
wanted)
2.5BlockE-ComputeI[0]/N[0]orepfdforallinterference
paths
2.6Accountingfortheaggregateimpactofmultipleearth
stations/satellitesontheinterferencelevels
2.6.1Aggregatebasedonmultiplesimulations
2.6.2Aggregatebasedononesimulation
2.7Expressionsofinterferenceintermsofepfdandepfd
3Exampleofnon-GSOandGSOinterferencemethodology
3.1Validationofinterferenceresults
Annex4Continuingworkprogramme
