Authors
Marek Hubert Zienkiewicz
Department of Geodesy and Oceanography, Gdynia Maritime University, Sędzickiego 19, 81-374, Gdynia, Poland
Krzysztof Czaplewski
Department of Geodesy and Oceanography, Gdynia Maritime University, Sędzickiego 19, 81-374, Gdynia, Poland