TY - JOUR A1 - Williams, B. P. A1 - Berkey, F. T. A1 - Sherman, J. A1 - She, C. Y. T1 - Coincident extremely large sporadic sodium and sporadic E layers observed in the lower thermosphere over Colorado and Utah JO - Ann. Geophys. J1 - ANGEO VL - 25 IS - 1 SP - 3 EP - 8 Y1 - 2007/02/01 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/25/3/2007/ L1 - https://angeo.copernicus.org/articles/25/3/2007/angeo-25-3-2007.pdf DO - 10.5194/angeo-25-3-2007 ER -