ey
matched well with che control-step wedge curves in Che region of overlap, ani
together give a Jeasitveversus-exposure curve over the eatire range of interest.
Table 22.3 sccmurises results obtained from photographic instmmeotacion.
ll.s.1
Fraaing Caaera Data
Good quality hizh-speed frasing camera data are lacking for boch sbors.
The loss in the case of Orange is due to cloud cover at shot tive which obscured
the burst from the ground.
Tesa.
Burst position error caused the loss in the case of
Aliinugh exposures were obtained on the narrow field records, the fire-
ball is mot included ic the frzme.
Exposures obtained presumably represent
light from the fireball which was scattered into the field of view by atcwospheric
haze.
While the scztrered light is, in fact, data, an attempt to carry out aa
acalysis hae nor been nade.
This same consideration applies to exposures frou
the wider angle framing cameras.
near the edge of the frame.
These include a small portion of the fireball
The Fastax ehutter action is such that this is the
portion for which the exposure is uncertain.
Radius-tioe data from these cameras
add very little to data obtained from the wide-angle color records.
Because of
loss of the 3500 A record on Teak it was believed useful to attempt to secure
relative exposure for the 4000, 5000, apd 6500 A bands for the first 10 usec
from these records.
This requires only the assumption that exposure reduction
caused Sy shutter action is che same for all wavelengths.
The color framing cameras provided excelient qualitative and quantitative
data about the fireball structure up to about 3 seconds for Teak (Figs. 11.6
and 11.7).
In addition, a few frases demonstrate the aurora emanating north-
ward from the bomb debris as a source.
Of course, because of the cloud cover,
no data of this kind were obtained for Orange.
A Mitchell canera aboard the
CSS Boxer provided excellent coverage to several minutes after detonation for
the Orange evect (Fig. 11.8).
Two additional Mitchells located at French
Frigate Shoals produced no significant data.
This was at least partly attrid-
utable to cleud cover.
11.4.2
Streak Camera Records
Except for the loss of one (fila breakaze, 3500 A, Yeax), the streak
camera records are the sost reliable quantitative data obtained on both Teas
The data obtained are of good quality out ta about 700 asec.
~
and Orange.
Pages 748, Ip
Gnt FIO wre deleted.
BY