Japan Geoscience Union Meeting 2014

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International Session (Oral)

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-CG Complex & General

[A-CG06_29AM2] Satellite Earth Environment Observation

Tue. Apr 29, 2014 11:00 AM - 12:45 PM 315 (3F)

Convener:*Riko Oki(Japan Aerospace Exploration Agency), Yoshiaki Honda(Chiba University, Center for Environmental), Kenlo Nishida Nasahara(Institute of Agricultural and Forest Engineering, University of Tsukuba), Takashi Nakajima(Tokai University Department of Network and Computer Engineering, School of Information and Design Engineering), Taikan Oki(Institute of Industrial Science, The University of Tokyo), Yokota Tatsuya(Center for Global Environmental Research, National Institute for Environmental Studies), Yukari N. Takayabu(Atmosphere and Ocean Research Institute(AORI), The University of Tokyo), Hiroshi Murakami(Earth Observation Research Center, Japan Aerospace Exploration Agency), Hajime Okamoto(Research Institute for Applied Mechanics,Kyushu University), Chair:Taikan Oki(Institute of Industrial Science, The University of Tokyo), Yoshiaki HONDA(Center for Environmental Remote Sensing, Chiba University)

11:45 AM - 12:00 PM

[ACG06-17] Current Status of the Products of AMSR2 on GCOM-W1 Satellite

*Taikan OKI1, Misako KACHI2, Kazuhiro NAOKI2, Masahiro HORI2, Takashi MAEDA2, Keiji IMAOKA2 (1.Institute of Industrial Science, The University of Tokyo, 2.Earth Observation Research Center, Japan Aerospace Exploration Agency)

Keywords:earth observation, hydrologic cycles, geophysical products, validation, data distribution

The Advanced Microwave Scanning Radiometer 2 (AMSR2), on board the first generation satellite of Global Change Observation Mission - Water (GCOM-W1 or "SHIZUKU") satellite, is multi-frequency, total-power microwave radiometer system with dual polarization channels for all frequency bands. The GCOM-W1 satellite was launched on May 18, 2012 (JST), and has started scientific observation since July 3, 2012. After the calibration and validation phase, which confirmed that all the pre-defined release accuracies are satisfied, the AMSR2 bright temperature product (Level 1) and geophysical parameter product (Level 2) were released to public since January 2013 and May 2013, respectively.Monitoring and validation of the AMSR2 geophysical parameters have been continued for further improvements of the observation accuracy in future algorithms. For example, the precipitation product is validated by comparing with the Precipitation Radar (PR) on board the Tropical Rainfall Measuring Mission (TRMM) satellite, and relative errors were 48% over ocean and 88 % over land for the period from September 1, 2012 to August 31, 2013.Quality control (QC) of in-situ data is also improved for the better validation. New QC method for buoy data, which is used in the validation of the sea surface temperature (SST) and sea surface wind speed products, is introduced to remove unreliable in-situ observation data from comparisons, including overlap check, movement speed check, comparison with numerical model, and statistical check by Bayes' theorem. Those efforts will contribute to improve the algorithm for future version-up.The AMSR2 standard products have been distributed through the GCOM-W1 Data Providing Service (https://gcom-w1.jaxa.jp/), and quick look of the products, browse images of all AMSR2 brightness temperatures and geophysical parameters are available at the JAXA Satellite Monitoring for Environmental Studies (JASMES) for Water Cycle (http://kuroshio.eorc.jaxa.jp/JASMES/WC.html).