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Analysis of ICESat data using Kalman filter and kriging to study height changes in East Antarctica
Author(s) -
Nguyen A. T.,
Herring T. A.
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl024272
Subject(s) - geodesy , kriging , geology , kalman filter , terrain , remote sensing , digital elevation model , environmental science , mathematics , geography , statistics , cartography
We analyze ICESat derived heights collected between Feb.03–Nov.04 using a kriging/Kalman filtering approach to investigate height changes in East Antarctica. The model's parameters are height change to an a priori static digital height model, seasonal signal expressed as an amplitude B and phase θ, and height‐change rate dh/dt for each (100 km) 2 block. From the Kalman filter results, dh/dt has a mean of −0.06 m/yr in the flat interior of East Antarctica. Spatially correlated pointing errors in the current data releases give uncertainties in the range 0.06 m/yr, making height change detection unreliable at this time. Our test shows that when using all available data with pointing knowledge equivalent to that of Laser 2a, height change detection with an accuracy level 0.02 m/yr can be achieved over flat terrains in East Antarctica.