High Resolution Fourier Transform Spectrometer for Ground-Based Verification of Greenhouse Gases Satellites

Satellite remote sensing is currently the best monitoring means to obtain global carbon source and sink data. The United States, Japan, China other countries are vigorously developing spaceborne detection technology. However, important factors that restrict application of greenhouse gas satellite technology include limited accuracy data products. How improve retrieval level payloads a problem needs be solved urgently. One effective way quality carry out ground synchronous authenticity verification system error correction. This paper mainly aims at shortcomings existing TCCON portable equipment EM27/SUN, develops High-Resolution Fourier Transform Spectrometer (HRFTS) based on dynamic collimation Through absorption method band scanning hyperspectral monochromatic light source, instrument’s spectrum measurement capability Instrument Line Shape (ILS) demonstrated. spectral resolution consistent with on-orbit load, reaching 0.26 cm−1. For interference obtained by spectrometer, restoration processing, control inversion algorithm optimization were carried solve problems baseline correction, fine registration, environmental parameter profile reconstruction, cross comparison experiments EM27/SUN simultaneously. Finally, for gases instrument (GMI) GF5-02 launched 7 September 2021, first synchronization experiment high space-time matching was out. results showed CO2 column concentration deviation about 1.5 ppm, CH4 11.3 ppb, which verified GMI, laid foundation subsequent systematic