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Study of Climate from the Lunar Surface and the Energy Imbalance between the Earth and Space
Abstract—Long-term high-precision monitoring of the Earth energy imbalance (EEI) requires new long-term stable space platforms for continuous and...
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Gravitational deformation of ring-focus antennas for VGOS: first investigations at the Onsala twin telescopes project
The receiving properties of radio telescopes used in geodetic and astrometric very long baseline interferometry (VLBI) depend on the surface quality...
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Short-baseline interferometry local-tie experiments at the Onsala Space Observatory
We present results from observation, correlation and analysis of interferometric measurements between the three geodetic very long baseline...
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Observing UT1-UTC with VGOS
We present first results for the determination of UT1-UTC using the VLBI Global Observing System (VGOS). During December 2019 through February 2020,...
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On the importance of accurate pole and station coordinates for VLBI Intensive baselines
Very long baseline interferometry (VLBI) is a geodetic technique capable of deriving the complete set of Earth orientation parameters, including the...
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The Australian mixed-mode observing program
Global geodetic VLBI is upgrading to its next-generation observing system, VGOS. This upgrade has turned out to be a process over multiple years,...
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Bridging astronomical, astrometric and geodetic scheduling for VGOS
Very Long Baseline Interferometry (VLBI) experiments are organized within the geodetic, astrometric and astronomical communities for different...
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Probing a southern hemisphere VLBI Intensive baseline configuration for UT1 determination
The deviation of Universal Time from atomic time, expressed as UT1−UTC, reflects the irregularities of the Earth rotation speed and is key to precise...
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Continuum Study on Uranus at the Millimeter/Submillimeter Wavelength with ALMA Data
Uranus is a unique solar system body with its extreme rotational axis, low luminosity, asymmetrical internal magnetic field and magnetosphere, and...
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Improvements and comparison of VLBI INT2 and INT3 session performance
One of the core products of VLBI is the rapid determination of the Earth rotation parameter, expressed through dUT1. Multiple so-called Intensive...
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Optimal antenna locations of the VLBI Global Observing System for the estimation of Earth orientation parameters
To support monitoring subtle effects in the Earth system such as a mean sea level rise of 3 mm/year, a next-generation VLBI system, the VLBI Global...
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Optimal VLBI baseline geometry for UT1-UTC Intensive observations
One of the main tasks of Very Long Baseline Interferometry (VLBI) is the rapid determination of the highly variable Earth’s rotation expressed...
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Large-Scale Dimensional Metrology for Geodesy—First Results from the European GeoMetre Project
In a joint effort, experts from measurement science and space-geodesy develop instrumentation and methods to further strengthen traceability to the...
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9. Signatures of Life and the Question of Detection
In this chapter we will elaborate on how evidence for life on other worlds can be sought, and if present, possibly detected. The best evidence for...
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Automated VLBI scheduling using AI-based parameter optimization
Within this work, a new geodetic very long baseline interferometry (VLBI) scheduling approach inspired by evolutionary processes based on selection,...
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Combinatorial optimization applied to VLBI scheduling
Due to the advent of powerful solvers, today linear programming has seen many applications in production and routing. In this publication, we present...
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Combining VGOS, legacy S/X and GNSS for the determination of UT1
We perform a combination on the observation level (COL) between VLBI and co-located GNSS in the context of VLBI intensive sessions. Our approach...
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Prospects of GENESIS and Galileo joint orbit and clock determination
The European Space Agency (ESA) is preparing a satellite mission called GENESIS to be launched in 2027 as part of the FutureNAV program. GENESIS...
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Triangulation of the Earth’s surface and its application to the geodetic velocity field modelling
The Earth’s crust is exposed by tectonic processes and is not static over time. Modelling of the Earth’s surface velocities is of utmost importance...
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Atmospheric refraction and system stability investigations in short-baseline VLBI observations
Geodetic very long baseline interferometry observations of radio telescopes, which are located in an immediate neighborhood, provide an optimal...
