S atrtem-ation correction applied. At the measured wawelengths cois would be a small correction and oearly the same for both chacmels. Trassaiasions of the tarrow band-pass filter were calculated for a l-ew dlack-body source; brever, temperature is not an zaportant factor here. The fraction of the black-body radiation in the band pass thar is transmitted by the filter waries caly j percent while the temperature waries frow 0.3 to cO ew. Figure 11.10 shows surface brightness wersus time taken from the framing camera records Chat ssw only the edge of the fireball. from the edge. The brightness is tazxen at a poine about | ka Again oo correction has been made for ataospheric transaission, and che absolute scale is uncertain because of the approximate mature of the correction for camera transmission near the frame edge.