Status Report of Project GRAND: An Extensive Air Shower Array of   Proportional Wire Chambers
  Project GRAND is an extensive air shower array utilizing position sensitive detectors of proportional wire chambers. The 64 detectors deployed in a field 100 m x 100 m are located at 86.2 deg W and 41.7 deg N, at 220 m above sea level. The project was completed about two years ago and has been taking data, simultaneously on two triggers: 1) multiple-hit coincidence triggers which collect data on extensive air showers, and 2) 200 Hz triggers which collect the single tracks stored in each station during the last 5 msec. 
J. Poirier, J. Carpenter, S. Desch, J. Gress, T. F. Lin, Y. Lu, and A.   Roesch