Changes in version 0.0.5                        

  - Added a new composable stochastic-model framework with
    time_series_model / sum_model objects and component constructors:
    wn(), ar1(), rw(), pl(), flicker(), and matern().
  - Added gmwm2() to fit stochastic models directly from wavelet
    variance, with new helpers for parameter layout, transformations,
    theoretical WV computation, and model printing/plotting.
  - Added gmwmx2_new() as a generic GMWMX interface for arbitrary X and
    y (in addition to GNSS-specific workflows), including explicit paths
    for complete and incomplete series (gmwmx2_new_no_missing() /
    gmwmx2_new_with_missing()).
  - Extended simulation/generation utilities with generate() methods for
    single and composite models plus missingness support
    (markov_two_states() and related plotting methods).
  - Added random-walk covariance C++ back-end routines
    (get_sigma_mat_rw(),
    get_mean_diagonal_super_diagonals_cov_mat_rw_cpp()) and integrated
    them through RcppExports.
  - Expanded documentation with many new man pages and three new
    vignettes: data_generation.Rmd,
    estimate_composite_stochastic_models.Rmd, and gmwmx2_new.Rmd.
  - Updated package metadata and dependencies for the new modeling stack
    (notably adding longmemo and pkgdown URL metadata updates).

                 Changes in version 0.0.4 (2026-01-07)                  

  - updated functions download_all_stations_ngl,
    download_estimated_velocities_ngl and download_station_ngl so that
    it exit gracefully if NGL server is not reachable.

                 Changes in version 0.0.3 (2025-08-19)                  

  - Solve minor bug when creating design matrix if jumps or earthquakes
    are indicated after the last observation.

                 Changes in version 0.0.2 (2025-04-10)                  

  - updated functions download_all_stations_ngl,
    download_estimated_velocities_ngl and download_station_ngl with new
    address of the NGL: https://geodesy.unr.edu and using httr2.

                 Changes in version 0.0.1 (2025-03-10)                  

first version