ITU R SM 1535:2001
ITU R SM 1535:2001 The Protection Of Safety Services From Unwanted Emissions
Table of Contents
ANNEX1-Protectionofsafetyservices1.Aeronauticalsystems
2.Space-baseddistressalertingandlocationsystems
2.1Cospas-Sarsatprotectionrequirements
ANNEX2-Mitigationtechniquesandmeasuresthatmay
beusedatthetransmitter
1.Practicalhardwareandsystemmeasurestobe
consideredatanearlystageinthedesignof
systemsinordertore
2.Trafficloadingmanagement
3.Bandutilization
4.Guardchannels
5.Monitoring
6.Transmitinhibit
ANNEX3-Mitigationtechniquesandmeasuresthatmaybe
usedbysafetyservices
1.Receiverarchitecture
2.Site-shielding
3.Operationalmeasures
4.Errorcorrectionandinterleaving
5.Frequencydiversity
6.Spacediversity
7.Beamdown-tilt
8.Antennapattern
9.Signalprocessing(radar)
10.RFfiltering
11.Timedivisionmultipleaccess(TDMA)/frequency
divisionmultipleaccess(FDMA)systems
12.Digitallycodedsquelch(DCS)/continuoustonecontrol
signallingsystem(CTCSS)
13.Monitoring
14.Trafficloadingmanagement
15.Adaptivepowercontrol
ANNEX4-Relevantfrequencybandsforsafetyservices
ANNEX5-Factorsthatshouldbeconsideredwhen
establishingprotectioncriteriaforaeronautical
safetyservices
1.Introduction
2.Specificfactors
ANNEX6-Generalsafetycriteriafromtheviewpointof
theaeronauticalservices
1.Background
2.Aeronauticalandnon-aeronauticalsourcesofharmful
interference
3.Sharedallocations
4.Aeronauticalradiocommunicationsystems
4.1Non-directionalbeacons(NDB)(LF/MF)
4.2HFandVHFdigitaldatainterchangeandanalogue
radiotelephony
4.3VOR
4.4VHFemergencyfrequencies
4.5ILS(VHFandUHF)
4.6DME(UHF)
4.7Globalnavigationsatellitesystem(GNSS)
4.8MLS
4.9Radars