The role of particle precipitation on plasma structuring at different altitudes by in-situ measurements

The plasma in the cusp ionosphere is subject to particle precipitation, which important for development of large-scale irregularities density. These can be broken down into smaller scales have been linked strong scintillations Global Navigation Satellite System (GNSS) signals. We present power spectra density regions with and without auroral precipitation based on in-situ measurements from Twin Rockets Investigate Cusp Electrodynamics-2 (TRICE-2) mission, consisting two sounding rockets flying simultaneously at different altitudes. electron taken multi-needle Langmuir probe system (m-NLP) were analyzed whole flight duration both rockets. Due their high sampling rates, probes allow a study kinetic scales. A steepening slope may indicate regimes, frequency interval shallow slope, where fluid-like processes are dominating, an steeper addressed theory. occurs frequencies between 20 Hz 100 median similar oxygen gyrofrequency. Additionally, occurrence double slopes increases starts throughout rest flight. In addition, fluctuations found poleward cusp, thus immediately after precipitation. Furthermore, by investigating integrated within ranges, we show that low (10–100 Hz), pronounced more evenly while rocket encounters (100–1000 Hz) essentially coincide passing through flow channel.