Since IGRINS is a visiting instrument, the data are ingested into the archive sporadically. It is recommended to use reduced data provided to PIs via emails. These data include the recipes used, final reduced spectra, and telluric calibrations, and are planned to be delivered every two weeks in 2022. For the data format of the delivered products, and for the appropriate acknowledgements please refer to the IGRINS webpage.
Additionally, there exists a publicly available Python data reduction package that users can utilize.