A Regional Model of Topside Ionospheric Effective Scale Heights Derived From Ionosonde and GNSS TEC by Chunhua Jiang, Zhichao Liu, Cong Zhao, Tongxin Liu, Guobin Yang, Hua Shen, Wengeng Huang

“…Furthermore, results show that the topside electron densities estimated by the proposed method are comparable with in situ observations measured by Swarm B.…”
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Space use of polar bears (Ursus maritimus) in Davis Strait in relation to sea ice and harp seals (Pagophilus groenlandicus) by Larissa Thelin, Evan Richardson, Garry Stenson, Erik Hedlin, Andrew E. Derocher

“…Polar bears (n = 18) tracked in 1991–2001 for 7–12 months had a mean 95% minimum convex polygon (MCP) home range size of 108 146 km2 (standard error of the mean (SE) = 18 252 km2) and a mean 95% kernel density home range size (kernel density estimate (KDE)) of 76 863 km2 (SE = 12 260 km2). …”
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Improved Neutral Density Predictions Through Machine Learning Enabled Exospheric Temperature Model by Richard J. Licata, Piyush M. Mehta, Daniel R. Weimer, W. Kent Tobiska

“…We conducted 10 case studies where we compare the accelerometer‐derived temperature and density estimates from four satellites to NRLMSISE‐00, EXTEMPLAR, and EXTEMPALR‐ML during major storm periods. …”
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Cluster Candidates with Massive Quiescent Galaxies at z ∼ 2 by Tomokazu Kiyota, Makoto Ando, Masayuki Tanaka, Alexis Finoguenov, Sadman Shariar Ali, Jean Coupon, Guillaume Desprez, Stephen Gwyn, Marcin Sawicki, Rhythm Shimakawa

“…We adopt a Gaussian kernel density estimate with two different spatial scales (10″ and 60″) to draw a density map of massive ( $\mathrm{log}({M}_{* }/{M}_{\odot })\gt 10.5$ ) and quiescent ( $\mathrm{log}(\mathrm{sSFR}\,[{\mathrm{yr}}^{-1}])\lt -10$ ) galaxies at z  ∼ 2. …”
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