Artillery Sound Ranging Computer Simulations.

The report demonstrates that aliasing can occur between microphone placement errors and wind and temperature estimation errors. A new type of field test is described to measure statistically the effect of wind and temperature fields on atmospheric sound ranging. From the contour error curves presented it can be seen that when a geometric solution is employed there can be an increase as great as 25 in the area enclosed by a given error contour if three microphones are used instead of six. With the development of a practical least-squares computer for field use, six microphones would result in an even greater increase in useable coverage. Author