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Zhu, Qingyu (author), Lu, Gang (author), Lei, Jiuhou (author), Deng, Yue (author), Doornbos, E.N. (author), van den IJssel, J.A.A. (author), Siemes, C. (author)The thermospheric neutral density response to the 7–9 September 2017 storms is investigated based on the Swarm satellite observations and the thermosphere-ionosphere-electrodynamic general circulation model (TIEGCM) simulation. The Swarm data depicted a prominent interhemispheric asymmetry (IHA) in the afternoon sector during the second storm...journal article 2023
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He, Jianhui (author), Astafyeva, Elvira (author), Yue, Xinan (author), Pedatella, Nicholas M. (author), Lin, Dong (author), Fuller-Rowell, Timothy J. (author), Fedrizzi, Mariangel (author), Doornbos, E.N. (author), Siemes, C. (author)On 3 February 2022, at 18:13 UTC, SpaceX launched and a short time later deployed 49 Starlink satellites at an orbit altitude between 210 and 320 km. The satellites were meant to be further raised to 550 km. However, the deployment took place during the main phase of a moderate geomagnetic storm, and another moderate storm occurred on the...journal article 2023
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Sarris, Theodore E. (author), Tourgaidis, Stelios (author), Pirnaris, Panagiotis (author), Baloukidis, Dimitris (author), Papadakis, Konstantinos (author), Doornbos, Eelco (author), Siemes, C. (author), Visser, P.N.A.M. (author), van den IJssel, J.A.A. (author)Daedalus MASE (Mission Assessment through Simulation Exercise) is an open-source package of scientific analysis tools aimed at research in the Lower Thermosphere-Ionosphere (LTI). It was created with the purpose to assess the performance and demonstrate closure of the mission objectives of Daedalus, a mission concept targeting to perform in...journal article 2023
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Gas-surface interactions modelling influence on satellite aerodynamics and thermosphere mass densityMarch, G. (author), van den IJssel, J.A.A. (author), Siemes, C. (author), Visser, P.N.A.M. (author), Doornbos, Eelco N. (author), Pilinski, Marcin (author)The satellite acceleration data from the CHAMP, GRACE, GOCE, and Swarm missions provide detailed information on the thermosphere density over the last two decades. Recent work on reducing errors in modelling the spacecraft geometry has greatly reduced scale differences between the thermosphere data sets from these missions. However, residual...journal article 2021
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Palmroth, Minna (author), Grandin, Maxime (author), Sarris, Theodoros (author), Doornbos, Eelco (author), Tourgaidis, Stelios (author), March, G. (author), Siemes, C. (author), van den IJssel, J.A.A. (author), Visser, P.N.A.M. (author)<p>The lower-Thermosphere-ionosphere (LTI) system consists of the upper atmosphere and the lower part of the ionosphere and as such comprises a complex system coupled to both the atmosphere below and space above. The atmospheric part of the LTI is dominated by laws of continuum fluid dynamics and chemistry, while the ionosphere is a plasma...journal article 2021
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De Teixeira Da Encarnação, J. (author), Visser, P.N.A.M. (author), Arnold, Daniel (author), Bezdek, Ales (author), Doornbos, E.N. (author), Ellmer, Matthias (author), Guo, Junyi (author), van den IJssel, J.A.A. (author), Iorfida, E. (author)Although the knowledge of the gravity of the Earth has improved considerably with CHAMP, GRACE, and GOCE (see appendices for a list of abbreviations) satellite missions, the geophysical community has identified the need for the continued monitoring of the time-variable component with the purpose of estimating the hydrological and...journal article 2020
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van den IJssel, J.A.A. (author), Doornbos, Eelco (author), Iorfida, E. (author), March, G. (author), Siemes, C. (author), Montenbruck, Oliver (author)After the detection of many anomalies in the Swarm accelerometer data, an alternative method has been developed to determine thermospheric densities for the three-satellite mission. Using a precise orbit determination approach, non-gravitational and aerodynamic-only accelerations are estimated from the high-quality Swarm GPS data. The GPS...journal article 2020
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Aruliah, Anasuya (author), Förster, Matthias (author), Hood, Rosie (author), McWhirter, Ian (author), Doornbos, E.N. (author)<p>It is generally assumed that horizontal wind velocities are independent of height above the F<span classCombining double low line"inline-formula">1</span> region (&gt;300km) due to the large molecular viscosity of the upper thermosphere. This assumption is used to compare two completely different methods of thermospheric...journal article 2019
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Visser, T. (author), March, G. (author), Doornbos, E.N. (author), de Visser, C.C. (author), Visser, P (author)Thermospheric wind measurements obtained from linear non-gravitational accelerations of the Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite show discrepancies when compared to ground-based measurements. In this paper the cross-wind is derived from both the linear and the angular accelerations using a newly developed...journal article 2019
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Visser, T. (author), March, G. (author), Doornbos, E.N. (author), de Visser, C.C. (author), Visser, P.N.A.M. (author)Recently, the horizontal and vertical cross wind at 225- to 295-km altitude were derived from linear acceleration measurements of the Gravity field and steady-state Ocean Circulation Explorer satellite. The vertical component of these wind data is compared to wind data derived from the mass spectrometers of the Atmosphere Explorer C and E and...journal article 2019
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Trinh, Quang Thai (author), Ern, Manfred (author), Doornbos, E.N. (author), Preusse, Peter (author), Riese, Martin (author)Atmospheric gravity waves (GWs) are essential for the dynamics of the middle atmosphere. Recent studies have shown that these waves are also important for the thermosphere/ionosphere (T/I) system. Via vertical coupling, GWs can significantly influence the mean state of the T/I system. However, the penetration of GWs into the T/I system is not...journal article 2018
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- March, G. (author), Doornbos, E.N. (author), Visser, P.N.A.M. (author) other 2018
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- Visser, T. (author), Doornbos, E.N. (author), de Visser, C.C. (author), Visser, P.N.A.M. (author), Fritsche, Bent (author) journal article 2018
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- March, G. (author), Visser, T. (author), Doornbos, E.N. (author), Iorfida, E. (author), van den IJssel, J.A.A. (author), Visser, P.N.A.M. (author) poster 2018
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Weimer, D. R. (author), Mlynczak, M. G. (author), Emmert, J. T. (author), Doornbos, E.N. (author), Sutton, E.H. (author), Hunt, L. A. (author)This paper presents measurements of the amplitudes and timings of the combined, annual, and semiannual variations of thermospheric neutral density, and a comparison of these density variations with measurements of the infrared emissions from carbon dioxide and nitric oxide in the thermosphere. The density values were obtained from...journal article 2018
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Dhadly, Manbharat S. (author), Emmert, John T. (author), Drob, Douglas P. (author), Conde, Mark G. (author), Doornbos, E.N. (author), Shepherd, Gordon (author), Makela, Jonathan (author), Wu, Qian (author), Nieciejewski, Richard J. (author), Ridley, Aaron J. (author)This study is focused on improving the poorly understood seasonal dependence of northern high-latitude F region thermospheric winds under active geomagnetic conditions. The gaps in our understanding of the dynamic high-latitude thermosphere are largely due to the sparseness of thermospheric wind measurements. With current observational...journal article 2018
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Astafyeva, E (author), Zakharenkova, I (author), Huba, J. D. (author), Doornbos, E.N. (author), van den IJssel, J.A.A. (author)By using data from multiple instruments, we investigate ionospheric/thermospheric behavior during the period from 21 to 23 June 2015, when three interplanetary shocks (IS) of different intensities arrived at Earth. The first IS was registered at 16:45 UT on 21 June and caused ~50 nT increase in the SYM-H index. The second IS arrived at 5:45...journal article 2017
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Sheng, Cheng (author), Lu, Gang (author), Solomon, Stanley C. (author), Wang, Wenbin (author), Doornbos, E.N. (author), Hunt, Linda A. (author), Mlynczak, Martin G. (author)Thermospheric temperature and density recovery during the 5 April 2010 geomagnetic storm has been investigated in this study. Neutral density recovery as revealed by Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIEGCM) simulations was slower than observations from GOCE, CHAMP, and GRACE satellites, suggesting that the...journal article 2017
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Visser, T. (author), Doornbos, E.N. (author), de Visser, C.C. (author), Visser, P.N.A.M. (author)Because of the highly accurate accelerometers, the GOCE mission has proven to be a unique source of thermosphere neutral density and cross-wind data. In the current methods, in which only the horizontal linear accelerations are used, the vertical winds cannot be obtained. In the algorithm proposed in this paper, angular accelerations derived...poster 2017
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Visser, T. (author), Doornbos, E.N. (author), de Visser, C.C. (author), Visser, P.N.A.M. (author)Because of the highly accurate accelerometers, the GOCE mission has proven to be a unique source of thermosphere neutral density and cross-wind data. In the current methods, in which only the horizontal linear accelerations are used, the vertical winds cannot be obtained. In the algorithm proposed in this paper, angular accelerations derived...abstract 2017