1. O. A. Khoda, “GPS Data Analysis Center of the Main Astronomical Observatory: Results of Observation Processing for GPS Weeks 1236–1399,” Kinem. Fiz. Nebes. Tel 26(6), 56–67 (2010) [Kinem. Phys. Cel. Bodies 26, 313 (2010)].
2. O. A. Khoda, “Determination of Coordinates of Ukrainian Permanent GRS Stations According to Observation Data for GPS Weeks 1236–1399,” Kinem. Fiz. Nebes. Tel 27(1), 25–39 (2011).
3. Bernese GPS Software Version 4.2, Ed. by U. Hugentobler, S. Schaer, and P. Fridez (Astron. Inst., Univ. of Berne, Berne, 2001).
4. J. M. Dow, R. E. Neilan, and G. Gendt, “The International GPS Service (IGS): Celebrating the 10th Anniversary and Looking to the Next Decade,” Adv. Space Res. 36, 320–326 (2005).
5. A. E. Niell, “Global Mapping Functions for the Atmosphere Delay at Radio Wavelengths,” J. Geophys. Res. B 101, 3227–3246 (1996).