There is a 6X6 grid of sensors in a 2" by 2" square.
The graph of points (M,T) of times-of-arrival T
of a traveling feature-thing
at Sensors M.
The "Angle" to the Target is off the vertical line through (0,0),
the upper-left corner of the (x,y,0) grid of Sensors.
Vertical differences are exaggerated