Auroral investigations by means of rockets

Secondary electron emission from meteoric smoke particles inside the polar ionosphere

“…4 of Pfister, 1967). Pfister (1967) also shows similar atmospheric secondary differential fluxes for higher altitudes. We assume that this atmospheric secondary electron (Left) Electron precipitation spectra for weak (dashdotted, data published in Miyoshi et al, 2015), medium (solid) and strong (dashed) conditions; spectra at the top of the atmosphere (black) and remnants at 90 km (green) and 70 km (red); and atmospheric secondary electron spectrum measured at 105 km by Doering (data taken from Fig.…”

“…3, data collected by Doering, published within Fig. 4 of Pfister, 1967). Pfister (1967) also shows similar atmospheric secondary differential fluxes for higher altitudes.…”

“…The TEE rates have been derived from an atmospheric secondary electron differential flux measured at 105 km altitude (Pfister, 1967) using the same yield formalism. However, the robustness of the TEE results is rather weak, as atmospheric secondary electron spectra at lower altitudes and the corresponding primary electron spectra are not available.…”

“…Fig. 2 of Pfister, 1967). This atmospheric secondary flux cannot be used for the other precipitation cases as it depends on the strength of the initial electron precipitation (Rees, 1969).…”

“…4. of Pfister, 1967). (Right) corresponding to the precipitation cases the electron density (blue), negative ion density (red) and positive ion density (green) have been modeled using the SIC model together with the electron density (black) for a model run without electron precipitation.…”