The Four‐Dimensional Variational Neustrelitz Electron Density Assimilation Model: NEDAM by L. Yuan, M. M. Hoque, Timothy Kodikara

“…We have successfully developed a four‐dimensional variational assimilation scheme, the Neustrelitz Electron Density Assimilation Model (NEDAM), and verified NEDAM by a simulation study using a European ground‐based GNSS network. …”
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Global‐Scale Ionospheric Tomography During the March 17, 2015 Geomagnetic Storm by F. S. Prol, T. Kodikara, M. M. Hoque, C. Borries

“…Validation results of this brief study period show that the accuracy of our tomography is better than the Neustrelitz Electron Density Model, which is the model used as background, and physics‐based thermosphere‐ionosphere‐electrodynamics general circulation model. …”
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Characterization of the Ionospheric Vertical Error Correlation Lengths Based on Global Ionosonde Observations by L. Yuan, Timothy Kodikara, M. M. Hoque

“…We present a statistical analysis on the ionospheric vertical error correlation length (VCL) based on a global network of ionosondes and the Neustrelitz Electron Density Model. We show that the locally derived VCL is well‐defined and the VCL does not show a considerable dependency on the geographical seasons while local time dependencies of the VCL are shown to be present. …”
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The Impact of Solar Activity on Forecasting the Upper Atmosphere via Assimilation of Electron Density Data by Timothy Kodikara, Kefei Zhang, Nicholas Michael Pedatella, Claudia Borries

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Long-term changes in the dependence of <i>Nm</i>F2 on solar flux at Juliusruh by M. G. Tan Jun Rios, M. G. Tan Jun Rios, C. Borries, H. Liu, J. Mielich

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Seasonal and Altitude Dependence of Thermospheric Metastable Helium Densities Measured by Fluorescence Lidar by C. Geach, B. Kaifler

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Luminosity Distance and Extinction by Submicrometer-sized Grains by R. Siebenmorgen, Frank Heymann, R. Chini

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GNSS Differential Code Bias Determination Using Rao‐Blackwellized Particle Filtering by Ben Reid, David R. Themens, Anthony McCaffrey, P. T. Jayachandran, Mainul Hoque, Andrew J. Mazzella Jr.

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Spatially Explicit Estimation of Clay and Organic Carbon Content in Agricultural Soils Using Multi-Annual Imaging Spectroscopy Data by Heike Gerighausen, Gunter Menz, Hermann Kaufmann

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Influence of Solar Wind High‐Speed Streams on the Brazilian Low‐Latitude Ionosphere During the Descending Phase of Solar Cycle 24 by S. P. Moraes‐Santos, C. M. N. Cândido, F. Becker‐Guedes, B. Nava, V. Klausner, C. Borries, F. S. Chingarandi, T. O. Osanyin

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Ionospheric Storm Scale Index Based on High Time Resolution UPC‐IonSAT Global Ionospheric Maps (IsUG) by Qi Liu, Manuel Hernández‐Pajares, Haixia Lyu, Michi Nishioka, Heng Yang, Enric Monte‐Moreno, Tamara Gulyaeva, Yannick Béniguel, Volker Wilken, Germán Olivares‐Pulido, Raül Orús‐Pérez

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