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The flux transport model HipFT implements advection, diffusion, and data assimilation on the solar surface on a logically rectangular nonuniform spherical grid. It is parallelized for use with multi-core CPUs and GPUs using a combination of Fortran's standard parallel do concurrent (DC), OpenMP Target data directives, and MPI. Serving as the computational core of the Open-source Flux Transport (OFT) software suite (ascl:2508.013), HipFT incorporates various differential rotation, meridional flow, super granular convective flow, and data assimilation models. HipRT also computes multiple realizations in a single run spanning multiple choices of parameters.
OFT (Open-source Flux Transport) generates full-Sun magnetograms; the package acquires and processes observational data, generates realistic convective flows, and runs them through a surface flux transport (SFT) model. OFT includes the data acquisition/mapping code MagMAP, the convective flow generation code ConFlow, and the surface flux transport code HipFT (ascl:2508.014) as submodules.