W-Y HWANG2018-09-102018-09-102005-10http://inspirehep.net/record/694705http://scholars.lib.ntu.edu.tw/handle/123456789/315493Comparison of air fluorescence and ionization measurements of E.M. shower depth profiles: test of a UHECR detector techniquejournal article10.1016/j.astropartphys.2005.11.004