Initial Study of Inversion Method for Estimating Energy Spectra of Auroral Precipitating Particles from Ground‐Based is Radar Observations

• Published in: Chinese Journal of Geophysics
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2007
• Subjects: Tromsø; EISCAT
• Online Access: http://dx.doi.org/10.1002/cjg2.1005; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcjg2.1005; https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/cjg2.1005

Abstract The principles and methods to estimate auroral precipitating particles' energy flux spectra from electron density from ground‐based incoherent scatter (IS) radar have been investigated in this paper. Fieldaligned measurements from EISCAT radar at Tromsø are used to estimate related results. In the energy range of 4~30 keV, the derived auroral electron spectra are reasonably consistent with FAST observations. Under both quiet and disturbed geomagnetic conditions, the characteristics of derived energy spectra are rather similar to some results reported in the past. This method provides an alternative way to obtain energy spectra of precipitating particles, and may also acts as the complement of the lower‐time‐resolution limitations of satellite energetic particle observations. It is of high value in both academic and applied fields to establish models of space environment disturbance.