Asset Publisher

Iterative inversion of global magnetospheric information from energy neutral atom (ENA) images recorded by the TC-2/NUADU instrument

Iterative inversion of global magnetospheric information from energy neutral atom (ENA) images recorded by the TC-2/NUADU instrument

Publication date: 16 October 2008

Authors: Lu, L. et al.

Journal: Science in China Series E: Technological Sciences
Volume: 51
Issue: 10
Page: 1731-1744
Year: 2008

Copyright: Science in China Press, Springer

A method is presented for retrieving the magnetospheric ion distribution from Energetic Neutral Atom (ENA) measurements made by the NUADU instrument on the TC-2 spacecraft. Based on the already well-established method of constrained linear inversion, an iterance technique suitable for the low count ENA measurements has been developed which is tolerant of the noise background. By the iterance technique, it is possible for the first time to simultaneously retrieve the magnetospheric ion distribution and the exospheric neutral density, and further to recover global ENA emissions in three dimensions. The technique is applied to a representative ENA image recorded in energy channel 2 (protons: 50-81 keV) of the NUADU instrument during a major geomagnetic storm and it is, thereby, shown that the retrieval method developed provides a useful tool for extracting ion distribution information from ENA data.

Link to publication
Last Update: Sep 1, 2019 9:12:10 AM
24-Oct-2021 22:42 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/s/w5yE0jw

Images And Videos

Related Publications

Related Links

See Also

Documentation