  Particles in an extended air shower (EAS), initiated by a cosmic ray primary,
lead to two nearly simultaneous detections in a scintillator pair. The angle of
the EAS and the axis through both scintillators can be reconstructed using the
time difference of the detections and the distance between the scintillators.
The acceptances of a scintillator along the axis through the scintillators and
perpendicularly on this axis follow the same distribution in theory. Using a
data set with two perpendicular detector pairs this theory is verified. The
distribution of possible origins of cosmic ray primaries, and the resulting
EAS, can thus be described using the perpendicular distribution for a given
time difference.
