Update calibration results of prism and AVNIR-2 onboard ALOS ‘Daichi’

The Advanced Land Observing Satellite (ALOS, nicknamed `Daichi´) was launched on January 2006, and has operated very well. However, its operation moved to the low load mode (LLM) since April 22, 2011, and was subsequently followed by an official termination on May 12, 2011. Notwithstanding, approx. 6,500,000 scenes of archived data covering the entire globe are available to users. Therefore the calibration result is still important information for users. This paper describes calibration results of two optical instruments called PRISM and AVNIR-2 onboard ALOS are summarized during whole mission period. The previous result has been published in 2009, which was explained an overview of calibration and validation plan, and their results at that time. As the updated calibration results, we confirmed 6.1 m (root mean square error, RMSE) for PRISM nadir-looking radiometer and 21.9 m (RMSE) for AVNIR-2 0 deg. pointing of absolute geometric accuracies, and no significant degradation on radiometric accuracy.