a covered the true burst location. 2-52 The most interesting phase of the fireball development could therefore not be observed. However the limb and so called envelope spaces, between radii of & km and 12 km, yielded interesting time resolved spectriscopic date for times uv *9 5 minutes afte: the burst. require muck svecific attention ard anzlysis. “™.:y Generally >ne can say that tne records “ill vrovide information on tie fluorescent yield of gamma ray and x-ray excitec air, or cne energy deposition in the air versus distance frow gource, and thus indirectly on source strength; infermatton on transition processes in the meclum and low exergy ¢evoeition range, on gas temperatures and cooling rater; also 2uGus errly resonbiae tion processes. One record shows nautio. tl'ux effects cn air. Cursory inspection of the spectrograms and cscillioccope craces indicates higher temperatures, a greater degree of ionizatica at a given radius than expected and thus larger cimesions of the luminous fireball. This is born out by the observation that the emission by molecular species at 12 km from brrst center was of almost equal magnitude as the originally expec ed signal from the 6 km location. Closer in,singly and doubly ionized atomic species show up where the appearance of molecular species was expected. On the other hand there are indications that the core area of the fireball was less bright than predicted indicating a higher rate of colling by radiat.. flow towards the edges. The project plans to analyze also high speed photograph!. ogy data for radius versus time and brightness versus time infor- mation, OPIEp« EP 5 LUE With some good luck the combined information may Ca Vo PACE &