Download and Process GIMMS NDVI3g Data R package gimms version 1.2.5 This is a set of functions to retrieve information about GIMMS NDVI3g files currently available online; download (and re-arrange, in the case of NDVI3g.v0) the half-monthly data sets; import downloaded files from ENVI binary (NDVI3g.v0) or NetCDF format (NDVI3g.v1) directly into R based on the widespread 'raster' package; conduct quality control; and generate monthly composites (e.g., maximum values) from the half-monthly input data. As a special gimmick, a method is included to conveniently apply the Mann-Kendall trend test upon 'Raster*' images, optionally featuring trend-free pre-whitening to account for lag-1 autocorrelation. Software Depends: R (>= 3.5), raster, methods Imports: curl, Kendall, parallel, ncdf4, zyp Suggests: checkmate, tinytest Florian Detsch <fdetsch@web.de> Comprehensive R Archive Network (CRAN) Florian Detsch [cre, aut] MIT + file LICENSE (https://CRAN.R-project.org/package=gimms/LICENSE) 2026-03-21 application/tgz https://CRAN.R-project.org/package=gimms doi:10.32614/CRAN.package.gimms