ITU R SA 363:1994
ITU R SA 363:1994 Space Operation Systems
Table of Contents
Annex1SpaceoperationsystemsFrequencies,bandwidthsandprotectioncriteria
1Introduction
2Spaceoperationfunctions
2.1Maintenancetelemetry
2.2Telecommand
2.3Tracking
2.3.1Spacecraftorbitcontrolsystem
2.3.2Surveillance,safety,recovery
2.3.3Orbitalaccuracy
2.3.4Attributionoflocationdatatomission
measurementsandobservations
2.3.5Publicationofephemeristables
2.3.6Remarks
3Preferredfrequencybands
3.1Lowerlimits
3.1.1Ionosphericeffectsontrackingaccuracy
3.1.2Necessarytrackingaccuracyeffectonchoice
offrequencies
3.2Upperlimit
3.3Otherfactorstobetakenintoaccountin
choosingfrequencies
3.4Summaryofpreferredfrequencybands
4Necessarybandwidth
5Protectioncriteria
5.1Protectionlevelofearthstationreceivers
5.2Protectionratioofspacestationreceivers
5.3Referencebandwidth
5.4Referencepercentageoftime
5.5Conclusionsonprotectioncriteria
6Operationalaspects
6.1Useofmissiontelecommunicationbandsforspaceoperation
6.1.1Advantages
6.1.2Disadvantages
6.2Useofspecificspaceoperationservicebands
6.2.1Advantages
6.2.2Disadvantages
6.3Combineduseofmissionandspecificfrequencybands
Annex2Effectsofartificialplasmasoncommunications
withspacecraft
1Introduction
2Summaryofatmosphericentryplasmaeffects
3Summaryofrocketexhaustplasmaeffects