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the radiance of a unit area of the emitter surface per solid angle and wavelength, the unit is Wm−2 ·sr−1 nm−1, kiirgustugevus kiirguri ühikuliselt pinnalt ruuminurga ja lainepikkuse kohta, ühikuks on Wm−2·sr−1nm−1
spektraalne kirkus . Kaugseire terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kas/spektraalne%20kirkus/1/est (16.07.2026)
