Gravity waves in the middle atmosphere during the MaCWAVE winter campaign: evidence of mountain wave critical level encounters

by L. Wang, D. C. Fritts, B. P. Williams, R. A. Goldberg, F. J. Schmidlin, U. Blum
Published 2006-07-01

Gravity wave penetration into the thermosphere: sensitivity to solar cycle variations and mean winds

by D. C. Fritts, S. L. Vadas
Published 2008-12-01

Coincident extremely large sporadic sodium and sporadic E layers observed in the lower thermosphere over Colorado and Utah

by B. P. Williams, B. P. Williams, F. T. Berkey, J. Sherman, J. Sherman, C. Y. She
Published 2007-02-01