artificialsatellitesintelecommunication backscattering brouillage congresses digitaltechniques electromagneticinterference electromagneticwaves engineering fading fiabilité funkverkehr globalpositioningsystem imagingsystems internationalefernmelde-union internationaltelecommunicationunion lawandlegislation management mathematicalmodels mechanical mobile mobileradiostations oceanwaves overheadelectriclines radar radio radiofrequencyallocation radiomeasurements radiowaves receiversandreception recht regulierung reliability remotesensing securitymeasures signalprocessing spaceenvironment spacesecurity statisticalmethods stochasticprocesses störung techniquesnumériques technology telecommunications traitementdusignal transmission transmissionsansfil transmittersandtransmission wirelesscommunications wirelesscommunicationsystems émetteursettransmission