TY - JOUR
N2 - In deformation analyses, it is important to find a stable reference frame and therefore the stability of the possible reference points must be controlled. There are several methods to test such stability. The paperâ€™s objective is to examine one of such methods, namely the method based on application of R-estimation, for its sensitivity to gross errors. The method in question applies three robust estimators, however, it is not robust itself. The robustness of the method depends on the number of unstable points (the fewer unstable points there are, the more robust is the proposed method). Such property makes it important to know how the estimates applied and the strategy itself respond to a gross error. The empirical influence functions (EIF) can provide necessary information and help to understand the response of the strategy for a gross error. The paper presents examples of EIFs of the estimates, their application in the strategy and describes how important and useful is such knowledge in practice.
L1 - http://so.czasopisma.pan.pl/Content/98322/PDF/art03.pdf
L2 - http://so.czasopisma.pan.pl/Content/98322
PY - 2011
IS - No 2
KW - displacement
KW - stability
KW - R-estimation
KW - empirical influence function
A1 - Duchnowski, Robert
PB - Commitee on Geodesy PAS
VL - vol. 60
T1 - Sensitivity of robust estimators applied in strategy for testing stability of reference points. EIF approach
DA - 2011
UR - http://so.czasopisma.pan.pl/dlibra/publication/edition/98322
T2 - Geodesy and Cartography
DOI - 10.2478/v10277-012-0011-z
ER -