TY - JOUR A1 - Zecha, M. A1 - Röttger, J. T1 - Occurrence of polar mesosphere summer echoes at very high latitudes JO - Ann. Geophys. J1 - ANGEO VL - 27 IS - 3 SP - 1331 EP - 1342 Y1 - 2009/03/30 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/27/1331/2009/ L1 - https://angeo.copernicus.org/articles/27/1331/2009/angeo-27-1331-2009.pdf DO - 10.5194/angeo-27-1331-2009 ER -