Abu-Zayyad, T.Belov, K.Bird, D.Boyer, J.Cao, Z.Catanese, M.Chen, G.Clay, R.Covault, C.Dai, H.Dawson, B.Elbert, J.Fick, B.Fortson, L.Fowler, J.Gibbs, K.Glasmacher, M.Green, K.Ho, Y.Huang, A.et al.2006-07-212006-07-212001Astroparticle Physics, 2001; 16(1):1-110927-6505http://hdl.handle.net/2440/12415Copyright © 2001 Elsevier Science B.V. All rights reserved.The average extensive air shower longitudinal development profile is measured. Events between 10¹⁷ and 10¹⁸ eV recorded by the HiRes/MIA hybrid experiment are used for the average profile. Several functional forms are examined using this average profile. The best-fit parameters for the above functions are determined. © 2001 Elsevier Science B.V.enJournal article002001040710.1016/S0927-6505(00)00170-50001710635000012-s2.0-1804440307062045Clay, R. [0000-0002-9040-9648]Dawson, B. [0000-0002-4271-3055]