Ya. Fomin et al., The EAS-1000 array and perspectives of the primary mass composition studies at ultra-high energies, NUCL PH B-P, 75A, 1999, pp. 368-369
The status of EAS-1000 array is presented. Considering the possibility of d
ata acquisition on EAS muons and (Cherenkov light the problem of CR mass co
mposition investigations is discussed.