A Robust Estimation based on linear combinations of Order Statistics. Examples include the Median and Tukey's Trimean.
See also M-Estimate, R-Estimate
References
Press, W. H.; Flannery, B. P.; Teukolsky, S. A.; and Vetterling, W. T. ``Robust Estimation.'' §15.7 in
Numerical Recipes in FORTRAN: The Art of Scientific Computing, 2nd ed. Cambridge, England:
Cambridge University Press, pp. 694-700, 1992.