Searched for: subject%3A%22Orbit%255C+Determination%22
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Witte, Daan (author)
Cislunar space is getting increasingly important. Countries like the US and China are directing their attention towards the Moon with the Artemis and Chang’e missions. Simultaneously, space debris pollution of our orbits is escalating, increasing the risk of the Kessler syndrome occurring. Space Situational Awareness (SSA) aims to prevent this....
master thesis 2024
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Fayolle-Chambe, M.S. (author), Dirkx, D. (author), Cimo, G. (author), Gurvits, L. (author), Lainey, V. (author), Visser, P.N.A.M. (author)
In the coming decade, JUICE and Europa Clipper radio-science will yield the most accurate estimation to date of the Galilean moons’ physical parameters and ephemerides. JUICE's PRIDE (Planetary Radio Interferometry and Doppler Experiment) will help achieve such a solution by providing VLBI (Very Long Baseline Interferometry) observations of...
journal article 2024
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Stiller, Dominik (author)
Precision orbit determination for geodetic applications requires force models even for small perturbations. Radiation from the Sun and Moon is a significant source of perturbation in lunar orbits and inadequate modeling of radiation pressure (RP) can lead to large position errors. This paper describes the short-term effect of RP on the Lunar...
student report 2023
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Sinha, Ishita (author)
Recent launches of satellite constellations in the Low Earth Orbit (LEO) region have increased the collision probability of existing debris objects with active satellites. Monitoring the trajectories of these debris objects is crucial for Space Situational Awareness (SSA) to prevent the creation of more debris due to unwanted collisions. Much...
master thesis 2023
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Salas Lasala, María (author)
The Event Horizon Telescope (EHT) is a global array of telescopes that employs Very Long Baseline Interferometry (VLBI) techniques to image the event horizon of black holes. To overcome the limitations of ground-based telescopes, this thesis explores the mission concept involving a two-satellite constellation of space-borne telescopes deployed...
master thesis 2023
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Paliušis, Kipras (author)
Laser communication provides numerous benefits over typical Radio Frequency communication, such as lower power, not occupying regulated frequency bands, possibilities for much higher data rates and resistance to jamming. Combined with satellite constellations, Laser Inter-satellite Links (LISL) can enable global connectivity. However, satellites...
master thesis 2023
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Schrama, Ernst (author), Visser, P.N.A.M. (author)
In this paper we review the precision orbit determination (POD) performance of the CryoSat-2 mission where we used all tracking data between June-2010 and Jan-2023; with station and beacon coordinates provided in the ITRF2020 reference system, we use a mean gravity model, and we use spacecraft specific models for modeling drag and radiation...
journal article 2023
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)
In recent years, there has been a growing interest in lunar missions, particularly with the growing role of small satellites facilitated by piggyback launch opportunities. Typically, ground-based radiometric tracking is the workhorse to establish the necessary navigation solution in these missions, however, this could be expensive, while small...
conference paper 2023
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Mateo Aguaron, Alfonso (author)
During its thirteen-year long mission in the Saturnian system, the Cassini spacecraft routinely used Titan, Saturn’s largest moon, for performing its gravity assists. The problem of determining the gravity field of Titan by performing a precise fit of Cassini’s orbit to the available Doppler tracking data was reviewed in this study. The...
master thesis 2022
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Tanis, Tobias (author)
Autonomous orbit determination could help reducing the growing load on ground-based deep space networks. For small satellites, orbit determination based solely on inter-satellite measurements could be a strong alternative for conventional ground-based navigation support. The possibilities of this autonomous orbit determination method are...
master thesis 2022
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Chinari Subhechha Subudhi, Subhechha (author)
The applications for which the data from Earth observation satellites can be used are dependent on the precision and accuracy of the position of the satellite. Hence, precise orbit determination of satellites is crucial for the success of Earth observation satellites like the Sentinel family of satellites. TU Delft is an analysis center of the...
master thesis 2022
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)
This study presents an autonomous orbit determination system based on crosslink radiometric measurements applied to a future lunar CubeSat mission to clearly highlight its advantages with respect to existing ground-based navigation strategies. This work is based on the Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAISON) method...
journal article 2022
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Fernández, Marc (author), Peter, Heike (author), Arnold, Daniel (author), Duan, Bingbing (author), Simons, W.J.F. (author), Wermuth, Martin (author), Hackel, S.F.G. (author), Fernández, Jaime (author), Jäggi, Adrian (author), Hugentobler, Urs (author), Visser, P.N.A.M. (author), Féménias, Pierre (author)
Copernicus Sentinel–1 is a C-Band Synthetic Aperture Radar (SAR) satellite mission within the European Copernicus Programme. The two satellites Sentinel-1A and -1B were launched in April 2014 and 2016, respectively. The Copernicus POD (Precise Orbit Determination) Service is responsible for the determination of orbital and auxiliary products...
journal article 2022
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Rood, Willem (author)
The Royal Netherlands Airforce (RNLAF) is currently supporting the Feasibility study for Optical Tracking of Orbital Satellites (FOTOS), which aims to create a satellite observation instrument, FOTOS1, for the optical tracking of satellites, which would be a key tool towards maintaining a sustainable use of space. This thesis was tasked with...
master thesis 2021
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van den Abbeele, Bert (author)
An array of BlackGEM telescopes is currently being constructed in Chile. The Royal Netherlands Air Force wants to assess the suitability of the BlackGEM telescopes for initial orbit determination of unknown objects in high orbits around Earth. A set of short arc observations of geostationary satellites of no more than 5 minutes is available from...
master thesis 2021
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Vancraen, Sander (author)
The Indian Space Research Organisation(ISRO) plans to equip future satellites of its Indian Nano Satellite(INS) with COTS dual frequency receivers in order to let them contribute to various scientific research opportunities. This thesis develops a test framework for Commercial Of The Shelf (COTS) Global Navigation Satellite System (GNSS...
master thesis 2021
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Massarweh, L. (author), Strasser, Sebastian (author), Mayer-Gürr, Torsten (author)
The estimation of satellite orbits and clocks plays a central role in different Global Navigation Satellite System (GNSS) domains, e.g. precise positioning or time transfer. Such products can be computed in the process of Orbit Determination and Time Synchronization (ODTS), which relies on a network of ground-based stations, well distributed...
journal article 2021
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Schreiter, Lucas (author), Montenbruck, Oliver (author), Zangerl, Franz (author), Siemes, C. (author), Arnold, Daniel (author), Jäggi, Adrian (author)
Gravity fields derived from GPS tracking of the three Swarm satellites have shown artifacts near the geomagnetic equator, where the carrier phase tracking on the L2 frequency is unable to follow rapid ionospheric path delay changes due to a limited tracking loop bandwidth of only 0.25 Hz in the early years of the mission. Based on the...
journal article 2021
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Brunt, Casper (author)
The number of Moon missions is increasing, but to facilitate these missions, an improved approach for lunar navigation is required. The proposed strategy is to deploy a constellation in Polar or Equatorial Medium Earth Orbits (PECMEO) based on GNSS technology, which can be utilised as universal lunar navigation system: the Lunar Positioning...
master thesis 2020
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Guindal Martínez, Alvaro (author)
The first close-up image of a black hole has been taken recently by means of a network of high-resolution telescopes situated all around the globe, also known as Event Horizon Telescope (EHT). In that regard, this Master Thesis reviews the feasibility of establishing accurate inter-satellite baselines in a two-satellite constellation of...
master thesis 2020
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