Radar binciken sararin sama yana nufin nau'in tsarin radar da ake amfani da shi don ganowa da gano abubuwa a saman ruwa ko kusa da ruwa, kamar jiragen ruwa, jiragen ruwa, jiragen sama, da sauran cikas. Yana aiki ta hanyar fitar da raƙuman radiyo waɗanda ke billa da niyya sannan kuma gano tunanin waɗancan raƙuman ruwa don tantance wurin da aka nufa, nisa, saurinsa, da sauran halaye. Kalmar “binciken sararin sama” na nuni da cewa irin wannan nau’in radar an kera shi ne musamman domin gano abubuwan da ke sama, sabanin radar binciken iska, wanda ake amfani da shi wajen gano abubuwan da ake kaiwa iska.