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Niu Liu / Comparison of multifrequency positions of extragalactic sources

Comparison of the multi-frequency position of extra-galactic sources

Topics: ICRF3 Gaia quasars
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Updated Mar 23, 2023

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Updated Mar 23, 2023
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Niu Liu / Ephemerides frame comparison using pulsar timing astrometry

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Updated Oct 16, 2023

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Updated Oct 16, 2023
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Niu Liu / icrf-axis-stability
MIT License

Estimate the axis stability of the ICRF3 catalog

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Updated Mar 26, 2022

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Updated Mar 26, 2022
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Niu Liu / icrf_vs_gaia-crf2

Systematics and accuracy of VLBI astrometry

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Updated Apr 03, 2021

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Updated Apr 03, 2021
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Niu Liu / thesis-materials

Some materials (mostly codes) of my thesis

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Updated Apr 03, 2021

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Updated Apr 03, 2021
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Niu Liu / Timing-CRF vs Gaia-CRF and VLBI-CRF
MIT License

archived 0

Updated Mar 20, 2023

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Updated Mar 20, 2023
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Niu Liu / vlbi_noise

Estimate the internal accuracy of the VLBI catalogs

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Updated Apr 02, 2021

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Updated Apr 02, 2021