[16a-418-1~10] 3.8 Optical measurement, instrumentation, and sensor

[16a-418-2] Stand-off measurement of vegetation fluorescence on the canopy level under insolation

〇Kenji Kuriyama¹, Naohiro Manago², Koki Homma³, Kanako Muramatsu⁴, Keniti Yoshimura⁵, Yuuji Kominami⁵, Hiroaki Kuze² (1.Shizuoka Univ., 2.Chiba Univ., 3.Tohoku Univ., 4.Nara Women's Univ., 5.FFPRT)

Keywords:Chlorophyll fluorescence, Solar-induced, Oxygen A-band

A stand-off system has been developed for observing solar-induced vegetation fluorescence on the canopy level. The system collects optical signals using a telescope, leading to the spectral measurement using a CCD spectrometer, as well as the two-dimensional measurement of the fluorescence intensity distribution by means of a cooled CCD camera. The spectrum of whiteboard taken simultaneously with that of vegetation canopy is used as a reference to extract the fluorescence intensity. We describe the application of this system to soybean and rice fields recently performed in Kyoto. It is found that the present approach based on spectral shapes is useful for extracting weak fluorescence signals even under daylight conditions.