Search Publications
Sun-to-Earth Characteristics of the 2012 July 12 Coronal Mass Ejection and Associated Geo-effectiveness
Möstl, Christian; Wang, Rui; Yang, Zhongwei +2 more
We analyze multi-spacecraft observations associated with the 2012 July 12 coronal mass ejection (CME), covering the source region on the Sun from the Solar Dynamics Observatory, stereoscopic imaging observations from the Solar Terrestrial Relations Observatory (STEREO), magnetic field characteristics from Mercury Surface, Space Environment, Geoche…
Prediction of Geomagnetic Storm Strength from Inner Heliospheric In Situ Observations
Feng, L.; Möstl, C.; Eastwood, J. P. +4 more
Prediction of the effects of coronal mass ejections (CMEs) on Earth strongly depends on knowledge of the interplanetary magnetic field southward component, B z . Predicting the strength and duration of B z inside a CME with sufficient accuracy is currently impossible, forming the so-called B z problem. Here, w…
The Roll-over of Heliospheric Neutral Hydrogen below 100 eV: Observations and Implications
Wurz, P.; McComas, D. J.; Fuselier, S. A. +8 more
We present an improved analysis of the energy spectrum of energetic neutral hydrogen from the heliosheath observed with the IBEX-Lo sensor on the Interstellar Boundary EXplorer from the years 2009 to 2012. This analysis allows us to study the lowest energies between 10 and 100 eV although various background sources are more intense than the target…
Venus Cloud Morphology and Motions from Ground-based Images at the Time of the Akatsuki Orbit Insertion
Hueso, R.; Sánchez-Lavega, A.; Rojas, J. F. +7 more
We report Venus image observations around the two maximum elongations of the planet at 2015 June and October. From these images we describe the global atmospheric dynamics and cloud morphology in the planet before the arrival of JAXA’s Akatsuki mission on 2015 December 7. The majority of the images were acquired at ultraviolet wavelengths (380-410…
On the Retrieval of Mesospheric Winds on Mars and Venus from Ground-based Observations at 10 µm
Lopez-Valverde, M. A.; Sornig, M.; Sonnabend, G. +1 more
A detailed analysis is presented of ground-based observations of atmospheric emissions on Mars and Venus under non-local thermodynamic equilibrium (non-LTE) conditions at high spectral resolution. Our first goal is to comprehend the difficulties behind the derivation of wind speeds from ground-based observations. A second goal is to set a framewor…