HR: 0800h
AN: A51C-0790    [Abstracts]
TI: Overview of Greenhouse Gases Observing Satellite (GOSAT) of Japan
AU: * Inoue, G
EM: inouegen@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506 Japan
AU: Yokota, T
EM: yoko@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506 Japan
AU: Oguma, H
EM: oguma@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506 Japan
AU: Higurashi, A
EM: hakiko@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506 Japan
AU: Morino, I
EM: morino@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506 Japan
AU: Aoki, T
EM: aoki.tadao@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506 Japan
AB: The observation of CO$_2$ from space is one of the top priority subjects of the carbon cycle research. We proposed to use the surface scattered light observation in near infrared (1.6 $\mu$m and 2.0 $\mu$m) by Fourier transform spectrometer on a satellite, and this project has been approved by Space Committee of Japan. The observed spectra will proved us the column concentration of CO$_2$, but little information on the vertical profile, as long as the spectral resolution is not very high (0.2cm$^{-1}$) and the signal to noise ratio is limited (S/N of 300 is the target value). The precision will exceed to 1% and our science team target is 0.3%. This value is far below the precision of in situ observation. However, the improvement of carbon sink/source analysis is expected to be remarkable compared with the data analysis of the present surface CO$_2$ monitoring network data. The satellite is in polar orbit with three days recurrent rate, which results in 10 degrees interval longitudinally. The local time of observation will be around 1 p.m. in order to minimize the sampling time error. This project is conducted jointly by Ministry of the Environment, National Institute for Environmental Studies, and Japan Aerospace Exploration Agency.
DE: 1610 Atmosphere (0315, 0325)
DE: 1640 Remote sensing
DE: 0360 Transmission and scattering of radiation
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting