The equivalent radar cross-section (sigma) of a three-axis radar reflector with triangular surfaces for a frequency of 9 GHz (3,2 cm) shall be calculated according to the following formula:
Ekvivalentni radarski prerez (sigma) triosnega radarskega reflektorja s trikotnimi površinami za frekvenco 9 GHz (3,2 cm) se izračuna z naslednjo formulo: