A5085848560- Astro and Planetary Science
- Planetary Science and Exploration
- Geophysics and Gravity Measurements
- Stellar, planetary, and galactic studies
- GNSS positioning and interference
- Spacecraft and Cryogenic Technologies
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Space Satellite Systems and Control
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Advanced Frequency and Time Standards
- Gamma-ray bursts and supernovae
- Gas Dynamics and Kinetic Theory
- Computational Fluid Dynamics and Aerodynamics
- Spacecraft Dynamics and Control
- Spacecraft Design and Technology
- Ionosphere and magnetosphere dynamics
- Inertial Sensor and Navigation
- Geomagnetism and Paleomagnetism Studies
- Adaptive optics and wavefront sensing
- Scientific Research and Discoveries
- Mechanical Engineering and Vibrations Research
- Satellite Communication Systems
- Pulsars and Gravitational Waves Research
Delft University of Technology
2015-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2023
Joint Institute for VLBI ERIC
2016-2017
Abstract The JUpiter ICy moons Explorer (JUICE) of ESA was launched on 14 April 2023 and will arrive at Jupiter its in July 2031. In this review article, we describe how JUICE investigate the interior three icy Galilean moons, Ganymede, Callisto Europa, during orbital tour final phase around Ganymede. Detailed geophysical observations about can only be performed from close distances to best estimates signatures interior, such as an induced magnetic field, tides rotation variations, radar...
In the coming decade, JUICE and Europa Clipper radio-science will yield most accurate estimation to date of Galilean moons' physical parameters ephemerides. JUICE's PRIDE (Planetary Radio Interferometry Doppler Experiment) help achieve such a solution by providing VLBI (Very Long Baseline Interferometry) observations spacecraft's lateral position, complementing nominal measurements. this paper, we quantify how can contribute ephemerides determination, in terms attainable improvement...
Abstract This study comprehensively evaluates the impact of expected Chinese Tianwen-4 mission, in conjunction with existing data from Juno on enhancing understanding Jupiter’s gravity field. Integrating simulated both missions. The methodology incorporates detailed simulations Tianwen-4’s orbit, assessing its influence field estimations across various orbital inclinations. It also explores integration multimission tracking data, combining and data. In addition to static coefficient,...
The Jupiter Icy Moons Explorer (JUICE), launched by the European Space Agency on April 14th, 2023, is an eight-year journey to Jovian system, arriving in July 2031. Among its eleven experiments, the Planetary Radio Interferometric and Doppler Experiment (PRIDE) stands out conduction Earth-based radio measurements. PRIDE leverages a network of Very Long Baseline Interferometry (VLBI) telescopes worldwide perform science experiments [Gurvits 2023]. These include occultation...
Abstract The radio telescopes of the European VLBI Network (EVN) and University Tasmania (UTAS) conducted an extensive observation campaign Space Agency’s (ESA) Mars Express (MEX) spacecraft between 2013 2020. campaign, carried out under Planetary Radio Interferometry Doppler Experiment (PRIDE) framework, aimed to study interplanetary phase scintillation assess noise budget in closed-loop observations. average was determined be approximately 10 mHz at a 10-second integration time,...
Context . The upcoming JUICE and Europa Clipper missions targeting Jupiter’s Galilean satellites will provide radio science tracking measurements of both spacecraft. Such data are expected to significantly help estimating the moons’ ephemerides related dynamical parameters (e.g. tidal dissipation parameters). However, two yield an imbalanced dataset, with no flybys planned at Io, condensed over less than six years. Current ephemerides’ solutions for moons, on other hand, rely ground-based...
Context. Closed-loop Doppler data obtained by deep space tracking networks (e.g., NASA's DSN and ESA's Estrack) are routinely used for navigation science applications. By "shadow tracking" the spacecraft signal, Earth-based radio telescopes involved in Planetary Radio Interferometry Experiment (PRIDE) can provide open-loop when dedicated facilities operating closed-loop mode only. Aims. We explain detail processing pipeline, discuss capabilities of technique its potential applications...
When reconstructing natural satellites' ephemerides from space missions' tracking data, the dynamics of spacecraft and bodies are often solved for separately, in a decoupled manner. Alternatively, ephemeris generation orbit determination can be performed concurrently. This method directly maps available data set to estimated parameters' covariances while fully accounting all dynamical couplings. It thus provides statistically consistent solution estimation problem, whereas this is not...
Abstract China will launch the “Tianwen-IV” mission around 2030, focusing on orbiting exploration of Jupiter and Callisto, a moon Jupiter. As part this ambitious mission, main satellite carry another that be released in system to continue its journey toward Uranus. Considering current planning, we propose an inter-satellite radio-observation mode differs from conventional observation tracking Earth precisely determine orbit satellites. Given significance Callisto gravity field model both...
Context. Radio occultation is a technique used to study planetary atmospheres by means of the refraction and absorption spacecraft carrier signal through atmosphere celestial body interest, as detected from ground station on Earth. This usually employed deep space tracking communication facilities (e.g., NASA's Deep Space Network (DSN), ESA's Estrack). Aims. We want characterize capabilities Planetary Interferometry Doppler Experiment (PRIDE) for radio experiments, using telescopes equipped...
Context. Exomoons are expected to orbit gas giant exoplanets just as moons Solar System planets. Tidal heating is present in satellites, and it can heat up their interior, depending on orbital interior properties. Aims. We aim identify a tidally heated exomoon’s (THEM) parameter space that would make observable infrared wavelengths with MIRI/JWST around ϵ Eridani b. study the possible constraints eccentricity properties successful THEM detection bring. also investigate what exomoon need be...
Stellar occultations currently provide the most accurate ground-based measurements of positions natural satellites (down to a few kilometres for Galilean moons). However, when using these observations in calculation satellite ephemerides, uncertainty planetary ephemerides dominates error budget occultation. We quantify local refinement central planet's position achievable by performing Very Long Baseline Interferometry (VLBI) tracking an in-system spacecraft temporally close demonstrate...