Print Email Facebook Twitter Exospheric Temperature Measured by NASA-GOLD Under Low Solar Activity Title Exospheric Temperature Measured by NASA-GOLD Under Low Solar Activity: Comparison With Other Data Sets Author Park, Jaeheung (Korea Astronomy and Space Science Institute; Korea University of Science and Technology) Evans, Joseph S. (Computational Physics Inc.) Eastes, Richard W. (University of Colorado) Lumpe, Jerry D. (Computational Physics Inc.) van den IJssel, J.A.A. (TU Delft Astrodynamics & Space Missions) Englert, Christoph R. (Naval Research Laboratory) Stevens, Michael H. (Naval Research Laboratory) Date 2022 Abstract Exospheric temperature is one of the key parameters in constructing thermospheric models and has been extensively studied with in situ observations and remote sensing. The Global-scale Observations of the Limb and Disk (GOLD) at a geosynchronous vantage point provides dayglow limb images for two longitude sectors, from which we can estimate the terrestrial exospheric temperature since 2018. In this paper, we investigate climatological behavior of the exospheric temperature measured by GOLD. The temperature has positive correlations with solar and geomagnetic activity and exhibits a morning-afternoon asymmetry, both of which agree with previous studies. We have found that the arithmetic sum of F10.7 (solar) and Ap (geomagnetic) indices is highly correlated with the exospheric temperature, explaining ∼64% of the day-to-day variability. Furthermore, the exospheric temperature has good correlation with thermospheric parameters (e.g., neutral temperature, O2 density, and NO emission index) sampled at various heights above ∼130 km, in spite of the well-known thermal gradient below ∼200 km. However, thermospheric temperature at altitudes around 100 km is not well correlated with the GOLD exospheric temperature. The result implies that effects other than thermospheric heating by solar Extreme Ultraviolet and geomagnetic activity take control below a threshold altitude that exists between ∼100 and ∼130 km. Subject Aura/MLSexospheric temperatureGOLDICONSwarmTIMED/SABER To reference this document use: http://resolver.tudelft.nl/uuid:1c8faafd-0a27-487b-b091-73f5ba3ee06a DOI https://doi.org/10.1029/2021JA030041 ISSN 2169-9380 Source Journal Of Geophysical Research-Space Physics, 127 (3) Part of collection Institutional Repository Document type journal article Rights © 2022 Jaeheung Park, Joseph S. Evans, Richard W. Eastes, Jerry D. Lumpe, J.A.A. van den IJssel, Christoph R. Englert, Michael H. Stevens Files PDF JGR_Space_Physics_2022_Pa ... n_With.pdf 5.58 MB Close viewer /islandora/object/uuid:1c8faafd-0a27-487b-b091-73f5ba3ee06a/datastream/OBJ/view