Small units (companies, troops, or batteries) should appoint and train
specific personnel within the unit to collect nuclear burst data. Data
obtained by these individuals is used by the unit for estimates of the
received. The data collected by small units is not reported to higher
headquarters unless specifically requested.
Methods of Locating Ground Zero.
Using the reported information, the location of GZ can be determined by
several different methods.
GZ will normally be determined by the
intersection of azimuths from two or more observations points reporting
on the same nuclear burst.
Other methods also can be used.
different methods of locating GZ are:
Intersection of two azimuths, (Figure 1-1)
Intersection of more than two azimuths, (Figure 1-2)
One observer reporting azimuth and flash-to-bang time, Polar
Plot, (Figure 1-3)
Intersection of two flash-to-bang times, (Figure 1-4)
Intersection of an azimuth and a flash-to-bang time arc,
a. Intersection of Two Azimuths.
To determine the location of GZ using this method the position of the
observers and the azimuths from their position are plotted on the
situation map. GZ is determined to be the point on the map where the two
Observer A's position is reported as coordinates 105240
azimuth to the nuclear cloud of 35 Grid. Observer B, located at
coordinates 157220, reported a measured azimuth of 340 Grid.
determine the location of ground zero, follow the step-by-step procedures
in Figure 1-1.
Plot observer A's location at coordinate 105240.
From observer A's location, draw a line on an azimuth of
Plot observer B's location at coordinate 157220.
From observer B's location, draw a line on an azimuth of
Where the lines intersect at coordinate
133280 is determined to be ground zero.