1. Higher Geodesy and Astronomy Department , L’viv Polytechnic National University , L’viv , Ukraine
2. PJSC “Ukrhydroenergo” , Vyshhorod , Ukraine
3. Engineering Geodesy Department , L’viv Polytechnic National University , L’viv , Ukraine
4. PJSC “Ukrhydroproject” , Kharkiv , Ukraine
5. JSC “Bancomzvjazok” , Kyiv , Ukraine