From quasars to geodesy: how astronomy can enable a new era in ultra-precise geodetic measurements

Project Details

Description

By combining astronomy and geodesy, we will develop a new method to foster the ultra-precise Very Long Baseline Interferometry (VLBI) observations. Geodetic VLBI observations utilize extragalactic radio sources, quasars, as reference points when measuring Earth's shape and orientation in space. Quasars, however, are not point-like sources but their internal structure will degrade the accuracy of the observations and ultimately, accuracy of the final product, the global reference frame. As a result of the project we will develop an automated method to measure and apply the actual structure of the radio source in future VLBI observations which will be a big leap towards the millimetre-accurate global geodetic reference frame.
AcronymNT-VGOS
StatusFinished
Effective start/end date01/09/201828/02/2023

Collaborative partners

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  • First Sagittarius A∗ Event Horizon Telescope Results. VII. Polarization of the Ring

    Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., & 31 othersBoyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Kim, D. J., Li, Z., Ramakrishnan, V., Savolainen, T., Wagner, J., Washington, J. E., Wiik, K. & Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, p. 1-32 32 p., L25.

    Research output: Contribution to journalArticleScientificpeer-review

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  • First Sagittarius A∗ Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring

    Ramakrishnan, V., Savolainen, T. & Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, L26.

    Research output: Contribution to journalArticleScientificpeer-review

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  • The persistent shadow of the supermassive black hole of M 87: I. Observations, calibration, imaging, and analysis*

    Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., & 31 othersBoyce, H., Bremer, M., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Carlstrom, J. E., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 18 Jan 2024, In: Astronomy and Astrophysics. 681, 63 p., A79.

    Research output: Contribution to journalArticleScientificpeer-review

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