Total Carbon Column
Observing Network

TCCON is a network of ground-based Fourier Transform Spectrometers recording direct solar spectra in the near-infrared spectral region. From these spectra, accurate and precise column-averaged abundance of CO2, CH4, N2O, HF, CO, H2O, and HDO are retrieved.

TCCON provides an essential validation resource for the Orbiting Carbon Observatory-2 (OCO-2), OCO-3, the Greenhouse Gases Observing Satellites GOSAT and GOSAT-2, the Sentinel 5P instrument TROPOMI, TanSat, and other missions.

For the latest TCCON information, please visit the TCCON Wiki at

For an archive of weather at some of our TCCON stations, please visit our Weather page.


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