To determine the spectral Jistributicn of the irradiance from Iepaton surface burst at an airborne station and compare it with an or atmospheric attenuation ay c+ be aw 7 station; and to determine the oO qQ 4 Q Qo a 7 ad 0 Ss a 4 we ce G 3 G ce QO O (4 oO ty pa i) tr 9 pe 4 Tv identical miceuremcnt from 4 surface . J. ~ “ ee o ~ Yaonds tyae pletocetle in the vieitle regten ond ThSS eeclle in 3 rei, the : infra- 7 r =~ 7 4 a a + a * The eleoteioct signal is then reccrje3 cn an Amrex 814 tape re- ruL and epectral tistritvtion from a fiwelt point on the ground towards beam is receivel ty a detector in the absolute, ° co r¢ 3 nN vu ~~ The afreraft wae leeatsd at the interdelt 5 \de 2 TM 83end & .it_lan?7 }te Oo J Cn gr a) Plteracu QO 19 Poo. Aas 2. SND feet with a horizontal range cf €5,4°C feet in a tail-on position) ° “wy g ~ 88 ———ap

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