[A-CG33] 静止軌道衛星による陸面観測

[ACG33-P03] Geolocation accuracy assessment of CEReS released Himawari-8 gridded data

*山本 雄平¹、市井 和仁¹、樋口 篤志¹、竹中 栄晶¹ (1.千葉大学 環境リモートセンシング研究センター)

キーワード：ひまわり８号、幾何補正

Geolocation accuracy is an essential issue due to the refinement of the terrestrial and meteorological scales accompanying the improvement of observation functions of new generation geostationary satellites. In the case of the Himawari-8, the Center for Environmental Remote Sensing (CEReS) at Chiba University released lat-lon coordinated and geometrically corrected processed data using a visible band with 500 m spatial resolution (CEReS data) from Himawari Standard Data provided by the Japan Meteorological Agency (JMA data). We evaluated the spatiotemporal variation characteristics of the geolocation errors of the two datasets and their stability against large unexpected misalignments when assuming terrestrial monitoring.

The results showed that the long-term stability of CEReS data from the start of operation of Himawari 8, and improvements of systematic geolocation errors, especially west-eaast direction from JMA data. As CEReS data are processed during the daytime due to the availability of visible bands, we suggest the use of CEReS data for effective terrestrial monitoring during the daytime (4 hours before and after noon).