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Conference Paper

Source structure effects in VLBI Global Observing System

Authors
/persons/resource/mhxu

Xu,  M.
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Savolainen,  Tuomas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

/persons/resource/schuh

Schuh,  H.
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

/persons/resource/rob

Heinkelmann,  R.
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Xu, M., Savolainen, T., Schuh, H., Heinkelmann, R. (2023): Source structure effects in VLBI Global Observing System, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3022


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020599
Abstract
The new generation of geodetic VLBI, VLBI Global Observing System (VGOS), is now regularly observing to produce the best geodetic VLBI data ever, with a thermal noise level of about 3 ps. However, the systematic errors due to angular structure of the radio sources are becoming prominent in these high-precision VGOS observations. It is important to understand, study, and monitor these systematic errors with the aim to model them in geodetic data processing. Improvements have been made to derive structure images and Gaussian components at the four bands (3 – 14 GHz) directly from VGOS observations on a regular basis. We will report the progress and the major challenges in modeling source structure in VGOS observations.