The Main Astronomical Observatory NAS of Ukraine started its GNSS activity in early 1990s taking part in some international epoch campaigns. In December 1997 MAO installed the first Ukrainian permanent GNSS station in Kiev (GLSV). Today the Observatory's network consists of five permanent stations located in different parts of Ukraine and included in IGS network, EPN, EPOS network. MAO maintains its Operational Centre, Local GNSS Data Centre, Local GNSS Analysis Centre.
As result of MAO second reprocessing campaign and regular processing of all available observations data from the Ukrainian stations, the coordinates in the IGb08 reference frame and tropospheric zenith delays were received. The velocities for 128 stations that had observation periods more than three years were estimated.
The obtained results made possible to calculate strain ellipses and rotation for Earth's surface and to conduct geodynamic studies at the local level.
The Main Astronomical Observatory NAS of Ukraine takes part in two international GNSS projects – EPN Densification and CEGRN.
Zurutuza J., Caporali A., Bertocco M., Ishchenko M., Khoda O., Steffen H., Figurski M., Parseliunas E., Berk S., Nykield G.  The Central European GNSS Research Network (CEGRN) dataset. Data in Brief, Vol. 27, 104762, pp. 1-15. https://doi.org/10.1016/j.dib.2019.104762.
Kenyeres A., Bellet J. G., Bruyninx C., Caporali A., de Doncker F., Droscak B., Duret A., Franke P., Georgiev I., Bingley R., Huisman L., Jivall L., Khoda O., Kollo K., Kurt A.I., Lahtinen S., Legrand J., Magyar B., Mesmaker D., Morozova K., Nágl J., Özdemir S., Papanikolaou X., Parseliunas E., Stangl G., Ryczywolski M., Tangen O.B., Valdes M., Zurutuza J., Weber M.  Regional integration of long-term national dense GNSS network solutions. GPS Solutions, 23, 122. https://doi.org/10.1007/s10291-019-0902-7.
Caporali A., Zurutuza J., Bertocco M., Ishchenko M., Khoda O.  Present day geokinematics of Central Europe. Journal of Geodynamics, Vol.132, December 2019,
Khoda O.  EPN Densification Project: Report of the Main Astronomical Observatory NAS of Ukraine. Presented at the EUREF Analysis Centres Workshop, Brussels, Belgium, October 25-26, 2017. http://epncb.eu/_newseventslinks/workshops/EPNLACWS_2017/pdf/05_EPN_dens.... DOI: 10.13140/RG.2.2.23477.22243.
Khoda O.  Estimation of Coordinates of the Eastern European Permanent GNSS Stations in the IGb08 Reference Frame for GPS Weeks 1709–1933. Kinematics Phys. Celest. Bodies. Vol.35, No.1, pp. 46-53. DOI: 10.3103/S0884591319010045.
Khoda O.  The second reprocessing campaign of historical observations in the GNSS data analysis centre of MAO NAS of Ukraine. Kinematics Phys. Celest. Bodies. Vol.36, No.5, pp. 243–252. DOI: 10.3103/S0884591320050050.
Orlyuk M. I., Ishchenko M.  Comparative analysis of modern deformation and the newest motions of the Earth surface in the territory of Ukraine. Geofizicheskiy Zhurnal,. No 4. Vol. 41. (In Ukrainian). https://doi.org/10.24028/gzh.0203-3100.v41i4.2019.177381.
Ishchenko M.  Investigation of deformation of the earth crust on the territory of Ukraine using a GNSS observations. Artificial Satellite, Vol. 53, No. 3, pp. 117–126. https://doi.org/10.2478/arsa-2018-000
EUREF working group on “EPN Densification” Charter. 6 p.