JpGU-AGU Joint Meeting 2020

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[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM20] Recent Advances in Ionosphere Observation and Modeling through New Observation Opportunities

convener:CHIYEN LIN(Center for Astronautical Physics and Engineering, National Central University, TAIWAN), Yen-Jung Wu(Space Sciences Laboratory, University of California, Berkeley), Yang-Yi Sun(China University of Geosciences), Charles Lin(Department of Earth Sciences, National Cheng Kung University)

[PEM20-14] First results from the ICON Far-Ultra-Violet (FUV) Instrument

*Harald U Frey1, Stephen B Mende1, Scott L England5, Robert R Meier2, Andrew W Stephan3, Farzad Kamalabadi4, Ulas Kamaci4, Thomas J Immel1 (1.University of California Berkeley, 2.George Mason University, 3.Naval Research Laboratory, 4.University of Illionois, 5.Virgina Technical University)

Keywords:NASA ICON mission, FUV instrument, ionospheric composition, ionospheric density, ionosphere variability

The NASA Ionospheric Connection Explorer (ICON) was launched in October 2019 to study the connection between terrestrial weather and space weather. One of the four science instruments is the Far-Ultra-Violet (FUV) Instrument. This Spectrographic Imager collects (altitude) limb view vertical profiles of the 135.6 nm emission from atomic oxygen and part of the molecular nitrogen Lyman-Birge-Hopfield band emission around 157 nm. These measurements are used to constrain models of the atomic oxygen to molecular nitrogen altitude profiles, their mixing ratio and the ionospheric density at the dayside, along with the ionospheric density on the nightside. We will present first results of the investigation into the variability of dayside ionospheric composition and night side density that have been obtained during the first half year of the ICON science mission.