This paper describes a new coincidence experiment designed to improve under
standing of the composition of the primary cosmic-ray beam around the knee
of the spectrum. The experiment consists of an air shower array on the surf
ace (SPASE-2), which works in coincidence with an array of air-Cherenkov de
tectors (VULCAN), and the Antarctic Muon and Neutrino Detector Array (AMAND
A) deep in the ice. The experiment must cover the energy range from similar
to 10(14) to similar to 3 x 10(16) eV to overlap with direct measurements
at lower energy and encompass the regions of the knee and beyond in the cos
mic ray spectrum. (C) 2000 Elsevier Science B.V. All rights reserved.