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 &