[H-TT15] Environmental Remote Sensing

[HTT15-03] Update of GCOM-C/SGLI Leaf Area Index & fraction of Absorbed Photosynthetically Active Radiation products

*Toshiyuki Kobayashi¹, Hideki Kobayashi², Wei Yang³, Yoshiaki HONDA³, Yuhsaku Ono, Shin Nagai², Tomoko Akitsu⁴, Kenlo Nasahara⁴, Masahiro Hori¹, Hiroshi Murakami¹ (1.Japan Aerospace Exploration Agency, 2.Japan Agency for Marine-Earth Science and Technology, 3.Chiba University, 4.University of Tsukuba)

Keywords:LAI, FAPAR

The Japan Aerospace Exploration Agency (JAXA) launched the Global Change Observation Mission - Climate (GCOM-C) satellite on December 23^rd, 2017. The 1^st version of the GCOM-C/SGLI Leaf Area Index (LAI) and fraction of Absorbed Photosynthetically Active Radiation (fAPAR) products were released on December 2018. LAI and fAPAR were estimated based on the look-up tables showing the relationships between the multi-angle atmospherically-corrected surface reflectance data and the LAI or fAPAR. The relationships between LAI/fAPAR and surface reflectance data at the top of canopy were simulated using a radiative transfer simulator, the Forest Light Environmental Simulator (FLiES) [1].

This year, we are planning to release the 2^nd version of the products, in which the algorithms and the data quality will be improved. In this research, we introduce the current situation of the Leaf Area Index (LAI) product and summarize the updates for the 2^nd version of the products.


[1] H. Kobayashi et al., A coupled 1-D atmosphere and 3-D canopy radiative transfer model for canopy reflectance, light environment, and photosynthesis simulation in a heterogeneous landscape, Remote Sensing of Environment, 112 (2008), 173-185.