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GOSAT (Greenhouse gases Observing Satellite) is a JAXA (Japan Aerospace Exploration Agency) mission within the GCOM (Global Change Observation Mission) program of Japan. The GOSAT mission goals call for the study of the transport mechanisms of greenhouse gases such as carbon dioxide (CO2) and methane (CH4).

The emphasis is on atmospheric monitoring to clarify the sources and sinks of CO2 on a sub-continental scale.

The overall mission objective is to contribute to environmental administration by estimating the Green House Gases (GHGs) source and sink on a sub-continental scale and to support the Kyoto protocol that was adsorbed at COP3/UNFCCC (3rd session of the conference in the framework of climate change) in 1997. The protocol calls for a reduction of greenhouse gases, in particular CO2; it requires all parties to reduce their emissions by 5% below the level of the year 1990, for the period of 2008-2012

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Unavailability of GOSAT data

23 July 2015

Due to some infrastructure upgrade and the release from JAXA of a new version of the FTS L1B product (version 200) the recent GOSAT data will be unavailable.

GOSAT - Hardware maintenance - Recent products unavailable

28 January 2015

An urgent hardware maintenance is ongoing on the GOSAT ground segment, making the most recent GOSAT products (L1, L2 and L3 FTS/CAI (from the last 4 months)) inaccessible from the FTP server.

Nominal service was resumed on 03 February 2015.

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Facts and figures
Operators JAXA (Japan Aerospace Exploration Agency)
Date of Launch 23 January 2009
Status Operating nominally in 2015
Orbit Height 666 km
Orbit Type Sun-synchronous
Repeat Cycle 3 days
Resolution (CAI instrument): 0.5 km (spectral bands 1,2,3), 1.5 km (spectral band 4)
Swath Width (CAI instrument): 1000 km (Channels 1-3), 750 km (Channel 4)
Onboard Sensors provided under TPM
  • TANSO-FTS (Thermal And Near infrared Sensor for carbon Observation - Fourier Transform Spectrometer)
  • TANSO-CAI (Thermal And Near infrared Sensor for carbon Observation - Cloud and Aerosol Imager)