_
t tt
a pote
.
|
f
It
Bo,
“ Maclear-device__ ! a One-second tick and
_... pulse. Cté‘
gang WWE tone
Figure 1
Atoll.
|
|
;
{
Timing traces recorded by NBS at Parry Island, Eniwetok
distant station in Mgure 2.
Times of detonations could be read from
the films to less than a millisecond; however, the wrld time at any
station was limited by the accuracy of estimates for propagation time
of the nuclear-device pulse, the timing pulses, or both. Effectively,
this limited accuracy of world times to about *) msec.
|
|
On Figure 1, the upper trace shows the electromagnetic nucleardevice signal as picked up on the broad-band receiver. The lower trace
20 ke
>
12.5 ke
;
>—
8 ke _——___—___—_—___>______——
Timing
Figure 2 Typical NBS narrow-band field strength
traces, with a timing trace recorded on a
multi-beam oscilloscope at a distant location,
13
————— Nn