@Article{acpd-4-4777-2004, AUTHOR = {Rapp, M. and Lübken, F.-J.}, TITLE = {Polar mesosphere summer echoes (PMSE): review of observations and current understanding}, JOURNAL = {Atmospheric Chemistry and Physics Discussions}, VOLUME = {4}, YEAR = {2004}, NUMBER = {4}, PAGES = {4777--4876}, URL = {http://www.atmos-chem-phys-discuss.net/4/4777/2004/}, ISSN = {1680-7367} }