EGU2020-18184
https://doi.org/10.5194/egusphere-egu2020-18184
EGU General Assembly 2020
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Investigation of the relationship between sensitivity level of the sources and the internal reliability value of VLBI observations during CONT14

Pakize Kurec Nehbit1,2, Robert Heinkelmann2, Harald Schuh2,3, and Haluk Konak1
Pakize Kurec Nehbit et al.
  • 1Department of Geomatics Engineering, Kocaeli University, Kocaeli, Turkey
  • 2GFZ German Research Centre for Geosciences, Potsdam, Germany (nehbit@gfz-potsdam.de)
  • 3Technische Universität Berlin, Chair of Satellite Geodesy, Berlin, Germany

The quality of geodetic networks can be determined with the sensitivity and the internal reliability magnitudes when the mathematical model established for the network adjustment is questioned. Internal reliability is used for controlling an observation with the help of the other observations in the network and describes the magnitude of the undetectable gross errors by using hypothesis testing. The sensitivity level is explained as the minimum value of the undetectable gross error in the adjusted coordinate differences. In VLBI the observed sources are of major importance for the quality of the observations.  In this study, it is investigated how the sensitivity levels of the sources impact the internal reliability of the observations during the continuous VLBI campaign CONT14. It is aimed to detect the poor sources and their effects statistically in the VLBI data analysis. If the sources having worst sensitivity value such as 0506-612, 3C454.3, NRAO150, and 3C345  have been excluded, the internal reliability values of the observations get better. For the rest of the sources the sensitivity distributions have been obtained as better. It can be concluded that the source structure might be significant for the quality of the observations.

How to cite: Kurec Nehbit, P., Heinkelmann, R., Schuh, H., and Konak, H.: Investigation of the relationship between sensitivity level of the sources and the internal reliability value of VLBI observations during CONT14, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-18184, https://doi.org/10.5194/egusphere-egu2020-18184, 2020.

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