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Van den IJssel, J.A.A. (author), Visser, P.N.A.M. (author), Doornbos, E.N. (author), Meyer, U. (author), Bock, H. (author), Jäggi, A. (author)The state-of-the-art GOCE Satellite-to-Satellite Tracking Instrument (SSTI) delivers high-quality GPS data with an almost continuous 1 Hz data rate, which allows for very Precise Orbit Determination (POD). Despite this good performance, the GPS receiver shows occasional unexpected L2 tracking losses, which mainly occur close to the geomagnetic...conference paper 2011
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Jouannic, B. (author), Noomen, R. (author), Van den IJssel, J.A.A. (author)Since December 1990, a number of spacecraft have performed a flyby around Earth in which an unexpected change in velocity has been observed, which has not been explained so far: the so-called flyby anomaly. The effect on the excess velocity has been expressed in an empirical relation by Anderson, which was based on data on 6 such flybys. However...conference paper 2015
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Van den IJssel, J.A.A. (author)Atmospheric density models are currently the limiting factor in the accuracy of the dynamic orbit determination and prediction of satellites in a low Earth orbit. Any improvement in these models would greatly aid in applications such as re-entry prediction, ground-track maintenance of Earth observation satellites and forecast of possible...doctoral thesis 2014
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Bock, H. (author), Jäggi, A. (author), Meyer, U. (author), Visser, P.N.A.M. (author), Van den IJssel, J.A.A. (author), Van Helleputte, T. (author), Heinze, M. (author), Hugentobler, U. (author)The first ESA (European Space Agency) Earth explorer core mission GOCE (Gravity field and steady-state Ocean Circulation Explorer) was launched on 17 March 2009 into a sun-synchronous dusk–dawn orbit with an exceptionally low initial altitude of about 280 km. The onboard 12-channel dual-frequency GPS (Global Positioning System) receiver delivers...journal article 2011
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Visser, P.N.A.M. (author), Van den IJssel, J.A.A. (author)The European Space Agency Gravity field and steady-state Ocean Circular Explorer (GOCE) carries a gradiometer consisting of three pairs of accelerometers in an orthogonal triad. Precise GOCE science orbit solutions (PSO), which are based on satellite-to-satellite tracking observations by the Global Positioning System and which are claimed to be...journal article 2014
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Siemes, C. (author), Maddox, Stephen (author), Carraz, Olivier (author), Cross, Trevor (author), George, Steven (author), van den IJssel, J.A.A. (author), Kiss-Toth, Marton (author), Pastena, Massimiliano (author), Visser, P.N.A.M. (author)Cold Atom technology has undergone rapid development in recent years and has been demonstrated in space in the form of cold atom scientific experiments and technology demonstrators, but has so far not been used as the fundamental sensor technology in a science mission. The European Space Agency therefore funded a 7-month project to define the...journal article 2022
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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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Park, Jaeheung (author), Evans, Joseph S. (author), Eastes, Richard W. (author), Lumpe, Jerry D. (author), van den IJssel, J.A.A. (author), Englert, Christoph R. (author), Stevens, Michael H. (author)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...journal article 2022
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Schreiter, Lucas (author), Stolle, Claudia (author), Rauberg, Jan (author), Kervalishvili, Guram (author), van den IJssel, J.A.A. (author), Arnold, Daniel (author), Xiong, Chao (author), Callegare, Andyara (author)Satellites in Low Earth Orbit (LEO) are essential for sounding the topside ionosphere. In this work, we present and validate a data set of Total Electron Content (TEC) and in situ electron density observations from the Gravity Recovery And Climate Experiment (GRACE) and GRACE-Follow-On missions as well as a TEC data set from the CHAllenging...journal article 2023
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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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Hladczuk, N.A. (author), van den IJssel, J.A.A. (author), Kodikara, T. (author), Siemes, C. (author), Visser, P.N.A.M. (author)Uncertainties in radiation pressure modelling play a significant role in the thermospheric density and crosswind observations derived from the GRACE-FO accelerometer, especially during low solar activity. Under such conditions, the radiation pressure acceleration matches the magnitude of the aerodynamic acceleration along the track and...journal article 2024
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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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van den IJssel, J.A.A. (author), Forte, B. (author), Montenbruck, O (author)The Swarm satellites are equipped with state-of-the-art Global Positioning System (GPS) receivers, which are used for the precise geolocation of the magnetic and electric field instruments, as well as for the determination of the Earth's gravity field, the total electron content and low-frequency thermospheric neutral densities. The onboard...journal article 2016
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Siemes, C. (author), De Teixeira Da Encarnação, J. (author), Doornbos, E.N. (author), van den IJssel, J.A.A. (author), Kraus, Jiří (author), Pereštý, Radek (author), Grunwaldt, Ludwig (author), Apelbaum, Guy (author), Flury, Jakob (author), Holmdahl Olsen, Poul Erik (author)The Swarm satellites were launched on November 22, 2013, and carry accelerometers and GPS receivers as part of their scientific payload. The GPS receivers do not only provide the position and time for the magnetic field measurements, but are also used for determining non-gravitational forces like drag and radiation pressure acting on the...journal article 2016
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De Teixeira Da Encarnação, J. (author), Arnold, Daniel (author), Bezděk, Aleš (author), Dahle, Christoph (author), Doornbos, E.N. (author), van den IJssel, J.A.A. (author), Jäggi, Adrian (author), Mayer-Gürr, Torsten (author), Sebera, Josef (author), Visser, P.N.A.M. (author), Zehentner, Norbert (author)It is of great interest to numerous geophysical studies that the time series of global gravity field models derived from Gravity Recovery and Climate Experiment (GRACE) data remains uninterrupted after the end of this mission. With this in mind, some institutes have been spending efforts to estimate gravity field models from alternative...journal article 2016
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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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Xiong, Chao (author), Xu, Ji Sheng (author), Stolle, Claudia (author), van den IJssel, J.A.A. (author), Yin, Fan (author), Kervalishvili, Guram N. (author), Zangerl, Franz (author)Transient signal loss of the global positioning system (GPS) has been frequently observed by receivers on board the European Space Agency's Swarm mission when the satellites encounter ionospheric plasma irregularities. In this study we provided the first comparison of the GPS signal amplitude degradations from receivers on board low Earth...journal article 2020
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Fæhn Follestad, A. (author), Clausen, L. B.N. (author), Miloch, W. J. (author), van den IJssel, J.A.A. (author), Haagmans, R. (author)Space weather phenomena such as scintillations of Global Navigation Satellite Systems (GNSS) signals are of increasing importance for aviation, the maritime, and civil engineering industries. The ionospheric plasma irregularities causing scintillations are associated with strong gradients in ionospheric plasma density. To provide nowcasts and...journal article 2020
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Lin, Yingyun (author), Xu, Jiyao (author), van den IJssel, J.A.A. (author), Yuan, Wei (author)One of the most important parameters in the atmosphere, the neutral temperature, becomes difficult to measure at high altitudes such as the exosphere. Therefore, based on the assumption of static equilibrium and isothermal atmosphere, a new method was developed to derive quiet-time exospheric temperatures using neutral atmospheric densities from...journal article 2022
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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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