ctmm is an R package for analyzing animal tracking data as a
continuous-time stochastic processes. Package features include FFT
variogram and Lomb-Scargle periodogram analysis, perturbative REML
estimation, Kriging, simulation, and autocorrelated kernel-density
home-range estimation. First-time users can start with the Methods in Ecology
and Evolution paper and then move on to the up-to-date vignettes
vignette('variogram') and
vignette('akde').