EM27/SUN GGG Interferogram processing suite

The EM27/SUN GGG Interferogram processing suite (EGI) is a collection of software tools to simplify processing data collected using EM27/SUN instruments through GGG. Complete processing is simplified down to a one-line command or can even be setup with a cronjob to run automatically e.g., overnight. EGI completes steps of matching meteorological, and location data, and obtaining a priori files automatically. EGI2020 also includes tools to create basic plots for quick QC purposes. EM27/SUN instruments are commercial, portable, solar-viewing FT-IR spectrometers (manufactured by Bruker). GGG is open-source software used to FFT the interferograms to spectra, and then fit the spectra to obtain column averaged abundances of CO2, CH4, H2O, CO, and N2O. GGG is used for the TCCON (https://tccon-wiki.caltech.edu/).