(a) Electron density of the high flyer measured with the m-NLP, (b) detrended electron density of the high flyer, (c) electron density of the low flyer, measured with the m-NLP, (d) detrended electron density of the low flyer; the density was detrended using a 5th-order Savitzky-Golay filter. The transparent data intervals correspond to attitude changes of the spacecraft. The x-axes correspond to UT (upper line), the magnetic footprint of the spacecraft (middle line), and the altitude of the rocket (bottom line).