Ann. Geophys., 40, 231–245, https://doi.org/10.5194/angeo-40-231-2022,https://doi.org/10.5194/angeo-40-231-2022, 2022
Short summary
Short summary
The HIBAR rocket launched on 28 January 2003 into the nightside aurora in order to measure high-frequency radio waves with both parallel and perpendicular antennae. The rocket encountered several short high-frequency radio wave bursts with a secondary wave associated with them, believed to be a product of a nonlinear wave–wave interaction of the initial wave with observed lower-frequency waves. Nonlinear waves are not often observed, and their dynamics are of significant interest.