【摘 要】
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The high-accuracy GPS velocity field is one of effective approaches to study the regional crustal displacement,and can provide validations and constraints f
【机 构】
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Chinese Antarctic Center of Surveying and Mapping,Wuhan 430079,China
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The high-accuracy GPS velocity field is one of effective approaches to study the regional crustal displacement,and can provide validations and constraints for GIA models.There are spatially and temporally correlated errors in GPS data.Applying a spatiotemporal filter can reduce these effects and improve the accuracy of GPS time series.To obtain high-accuracy GPS vertical velocities in Antarctic peninsula,a “regional filter” is used to remove the spatially correlated errors in the selected 6 GPS time series,and the classic autocorrelation function is used to mitigate the temporally correlated errors of each GPS time series.The result shows that the scatter of GPS time series is reduced significantly after spatiotemporal filtering,the reduction of maximum RMS can reach up to 41.82%,and mean RMS reduction is 35.44%.
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