Towards a New Cosmic Ray Composition Measurement in the Knee Using a Dual Air Cherenkov Array

We present a new dual non-imaging Cherenkov array. The array, which is operated in coincidence with the Soudan 2 underground tracking calorimeter, was designed to make multi-parameter measurements of extensive air showers for the purpose of extracting the composition of the primary cosmic rays. Preliminary results from the initial seasons of operation will be presented at the conference.