RADIOBALANDISANJ (az radio…), radioaltimetr, asbobest, ki bo yorii radiomavjho balandii parvozi apparathoi parish (samolyot, radifi masnu) va gayraro muayyan mekunad. Balandii parvozro bo rohi chen kardani fosilai vaqte, ki dar davomi on radiomavji afkandai asbob ba satdh Zamin barkhurda va az on inikos gardida, boz ba qabulkunaki asbob meoyad, muayyan mekunand. Radiobalandisanjho du nav meshavand: modulyatsiyaashon bo modulyatsiyai basomadi va impulsi (nig. Modulyatsiya). Radiobalandisanjhoi navi yakumro dar aviatsiya beshtar hangomi parvozhoi past (masalan, hangomi furomadan) istifoda mebaraid. Dar in mavrid Radiobalandisanj muttasil radisignalhoe meafkanad, ki basomadashon davri tagyir meyobad. Balandin apparati parishro az rui farqi basomadhoi radiosignalhoi afkanda va niikosshuda, ki indikatori asbob nishon medihad, muayyan mekunand.
Radiobalandisanjhoi navi duyumro ham dar aviatsiya (masalan, hangomi aerofotosuratgiri az -balandihoi kalon) va ham dar vaqti parvozhoi kayhoni (masalan, baroi irsoli amri dar balandii muayyan az sathi sayyora ba kor andokhtani muharriki tormozii apparat parish) istifoda mebarand. Dar in mavrid Radiobalandisanj impulshoi kutohi radiosignal meafkanad. Balandii apparati parish bo rohi chen kardani fosilai deromadi radioimpulshoi inikosshuda (nisbat ba impulshoe, ki bevosita az peredatchiki Radiobalandisanj ba qabulkunaki on meoyand) muayyan karda meshavad.