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

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.


Open PostDoc Position in the field of Satellite Geodesy
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


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
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.


Modern Geodesy in 1 minute and 30 seconds

COSPAR Outstanding Paper Award for Young Scientists
Committee for Space Research (COSPAR) every two year nominates candidates under 31 years of age for the Outstanding Paper Awards amongst authors of papers published in COSPAR peer-reviewed scientific journals: Advances in Space Research and Life Sciences in Space Research. The current edition covers research papers submitted for publication within 2018-2020.

COSPAR Bureau, following recommendations of the Publications Committee, recognized the contribution of dr. Pawel Hordyniec to Space Studies of the Earth’s Surface, Meteorology and Climate (Scientific Commission A) and awarded him for the manuscript entitled “Simulation of liquid water and ice contributions to bending angle profiles in the radio occultation technique”.


Archive: « PREVIOUS PAGE | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | NEXT PAGE »
Poczta / Logowanie do systemu
GISLab - Laboratorium GIS
Stacja permanentna GNSS 'WROC'
Stacja permanentna GNSS 'WROC'
Wroclaw University of Environmental and Life Sciences
Grunwaldzka 53
50-357 Wroclaw

NIP: 896-000-53-54, REGON: 00000 18 67

Phone +48 71 3205617
Fax +48 71 3205617