Package: gmsp
Type: Package
Title: Ground Motion Signal Processing
Version: 1.1.1
Authors@R: 
    person("Alejandro Daniel", "Verri", , "averri@fi.uba.ar",
           role = c("aut", "cre", "cph"),
           comment = c(ORCID = "0000-0002-8535-1170"))
Description: Implements short-time Fourier transform (STFT) based processing of strong-motion time series: time-grid regularisation, STFT-window and anti-alias-resampling strategy selection, edge tapering, and frequency-domain integration and differentiation, mapping a single input (acceleration, velocity, or displacement) to a consistent triplet under a chosen analysis bandwidth. Also provides intrinsic-mode-function decomposition via empirical mode decomposition (EMD), ensemble EMD (EEMD), and variational mode decomposition (VMD) with optional band-rule filtering; elastic single-degree-of-freedom (SDOF) domain-normalised acceleration, velocity, and displacement response spectra from their corresponding time-series domains by exact state-space integration; intensity measures including peak, root-mean-square (RMS), Arias intensity, significant-duration, cumulative absolute velocity, mean period, and the derived indices earthquake destructiveness potential (EPI) and power-of-input (PDI); and D50 and D100 horizontal response spectra. Methods: Huang et al. (1998) <doi:10.1098/rspa.1998.0193>, Wu and Huang (2009) <doi:10.1142/S1793536909000047>, Dragomiretskiy and Zosso (2014) <doi:10.1109/TSP.2013.2288675>, Boore (2010) <doi:10.1785/0120090400>. An optional indexing layer parses provider files in formats including 'PEER' 'NGA-West2' 'AT2', 'CESMD' 'V2'/'V2c', 'NWZ' 'V2A', Geological Survey of Canada 'TR', 'IGP'/'UCR' 'AC' variants, and generic two-column ASCII text, normalises components, writes per-record CSV (comma-separated values) and JSON (JavaScript Object Notation) pairs, and computes per-record intensity tables.
License: AGPL (>= 3)
URL: https://kanameishi.github.io/gmsp/
Encoding: UTF-8
Depends: R (>= 4.1.0)
Imports: data.table, digest, expm, jsonlite, Matrix, osqp, parallel,
        pracma, seewave, signal, stats, tools, utils, xemd
Config/roxygen2/version: 8.1.1
Suggests: bit64, knitr, rmarkdown
VignetteBuilder: knitr
SystemRequirements: tar (for archived record metadata)
NeedsCompilation: no
Packaged: 2026-11-11 21:53:45 UTC; averrik
Author: Alejandro Daniel Verri [aut, cre, cph] (ORCID:
    <https://orcid.org/0000-0002-8535-1170>)
Maintainer: Alejandro Daniel Verri <averri@fi.uba.ar>
Repository: CRAN
Date/Publication: 2026-11-11 22:40:02 UTC
