Initial results of GOSAT TANSO calibration

Greenhouse gases Observing SATellite (GOSAT) is a Japanese mission to observe greenhouse gases, such as CO 2 and CH 4 , from space with a Fourier transform spectrometer and a push broom imager. The GOSAT was launched on January 23, 2009. The initial functional check-out phase was completed on April 10 to confirm the on-orbit performance. The initial calibration and validation phase was completed on July 30 in the following 3 months to acquire observation data at calibration and validation sites. The initial calibration was evaluated on accuracies of radiometry, geometry and spectrometry by using acquired data. The results were reflected to the improvement of the Level 1 algorithm and the products. The initial calibrated Level 1 products have been already released to the GOSAT research PIs in August.