To estimate the relationship between vertical movements of the Earth’s crust, geoid temporalchanges and Mean Sea Level (MSL) variations, a knowledge about the absolute (determined from satelliteand space techniques) height changes over time is required. In this paper, we give an idea of determiningthe height changes with a use of Vertical Switching Edge Detection (VSED) algorithm. On the basis of theleast squares estimation, the VSED method detects the discontinuities in time series and determines thevalues of jumps at the same time. We used the time series from PPP (Precise Point Positioning) solutionobtained in NGL (Nevada Geodetic Laboratory) using satellite data gathered at more than 50 permanentstations located in Latvia, Lithuania and northeastern Poland. The minimum time span of data was set up to3 years. Data were pre-analyzed by removing outliers and interpolating small gaps. The obtained resultsgive an overview of a possibility of the proposed method to be used and the ongoing vertical movements onthe area we considered.

DOI: https://doi.org/10.3846/enviro.2017.207