Abstract: A system for impact analysis of soil surfaces includes a Clegg impact hammer, an accelerometer mounted on the hammer, an analog to digital converter to digitize the deceleration signal of the accelerometer, and a computer to store the digitized curve samples and to calculate selected impact parameters from the curve samples. The apparatus includes a notebook computer and additional components all of which are portable to enable storage of a great number of curve samples and calculation of the impact parameters for a large number of test points in the field immediately after each hammer drop.