News

GNSS observations in mining tremors analysis

13-09-2020

Among earthquakes, natural and anthropogenic ones can be distinguished. The Republic of Poland is located in an intraplate area where natural earthquakes are very rare. On the other hand, areas with a high density of active underground mining are threatened with induced seismicity. Seismic tremors occur regularly in the underground mining areas, and there are several hundred events annually with magnitudes greater than 2, with maximum magnitudes reaching 4. As mining tremors are shallow and very frequent, they cause damage to infrastructure.

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The onboard Galileo atomic clocks can correct the wrong position of satellites

29-08-2020

In the recent article published in GPS Solutions, scientists from IGG show how ultra-accurate atomic clocks can correct a total error in satellite positioning and navigation. This was impossible with GPS or GLONASS due to the low accuracy of onboard atomic clocks. The Galileo satellites are equipped with very stable atomic rubidium clocks and hydrogen masers. These clocks are so accurate that they can correct errors in the satellite positions. Although the total error of the signal including position and time should increase, it drops from 2.2 cm to 1.6 cm after using the atomic clocks onboard the Galileo satellites. This result is very surprising because at the stage of development of the satellite systems it was not planned to correct the position with data from atomic clocks. The total error of the Galileo signal is 1.6 cm, which is currently the most accurate of all navigation systems. The same error is 2.3 cm and 5.2 cm, in the case of GPS and GLONASS, respectively. Thus, the European Galileo system already provides the highest signal quality, despite the constellation incompleteness.

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Open PostDoc Position in the field of Satellite Geodesy

27-08-2020

The Institute of Geodesy and Geoinformatics (IGG UPWr) announces an open PostDoc position that will be funded by the Polish National Science Center in the framework of the project “Integrated terrestrial reference frames based on SLR measurements to geodetic, active LEO, and GNSS satellites” (project number: 2019/35/B/ST10/00515).

More information can be found here http://geo2.igig.up.wroc.pl/wordpress/wp-content/uploads/2020/08/Post_Doc.pdf

Results:

The Rector Committee for the Open PostDoc Position in the field of Satellite Geodesy at the Institute of Geodesy and Geoinformatics has undertaken the final decision. In total, 6 applications were received. All of them came from excellent candidates from the field of Satellite Geodesy. Half of the candidates were invited to an interview. The Committee made the final decision on the basis of the skills required for the project objectives, the publication record, and other requirements as specified in the call for the open position. According to the Committee decision, Dr Hossein Etemadfard fulfills all criteria specified in the call and has the best background preparation for the position in the project "Integrated terrestrial reference frames based on SLR measurements to geodetic, active LEO, and GNSS satellites" and thus has been selected to take up the PostDoc position.

Special lectures on seismology

30-07-2020

We kindly invite you to series of lectures by Prof. Eleftheria Papadimitriou and Prof. Vassilios Karakostas from Aristotle University of Thessaloniki, Greece. Both are professors in seismology at the Geophysics Department. They will present the basics of Faults & Fault Plane Solutions. The lectures are targeted primary for Master and PhD students, but all interested on the subject are also kindly invited. The seminars will held on 4th, 5th and 6th of August from 11:00 to 12:00 on-line in the Meet channel.

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Modern Geodesy in 1 minute and 30 seconds

21-07-2020