TANSO-FTS-2 Greenhouse Gas Observing Satellite-2 Payload

Advancing the Measurement of Greenhouse Gases

TANSO-FTS-2 provides very high signal-to-noise levels, very accurate onboard calibration and an agile intelligent pointing (IP) system that increases useful data collections in the presence of clouds.

The instrument measures greenhouse gas concentrations with extremely high accuracy covering the entire globe over a six-day revisit rate. This information is critical to climate monitoring and modeling. TANSO-FTS-2 measures carbon dioxide, methane and carbon monoxide simultaneously, allowing scientists to discriminate between natural and man-made emissions.

GOSAT-2 is a joint project of Japan’s Ministry of the Environment, the Japan Space Exploration Agency and the country’s National Institute for Environmental Studies. L3Harris developed the TANSO- FTS-2 under a subcontract to Mitsubishi Electric Corporation.

TANSO-FTS-2 Instrument

GOSAT-2 Design Feature	Mission Benefits
Cross-track Infrared Sounder (CrIS)- based passive detector cooler	Achieves needed temperatures with inherent reliability
New intelligent pointing function	Detects loud-free areas and maximizes measurements
Highly accurate and stable scanner	Minimizes scene-induced interferogram fluctuations
Very linear signal outputs	Minimize radiance errors due nonlinearity effects
Interferometer improvements	Provide more stable laser outputs; zero path difference position
Target for iterated local search (ILS) characterization	Delivers accurate on-orbit characterizations in two spectral bands
Multiple solar calibration target spectralon surfaces	Excellent knowledge of solar calibration target radiances over life
Flight-proven high-emissivity infrared calibration	Provides emissivity > 0.995 and temperature errors <100 millikelvin for precise calibration accuracy
Temperature stabilizers	Deliver enhanced calibration accuracy
Glint shield	Prevents Earth radiance, spacecraft glints from impacting solar calibration accuracy
ILS integrating sphere	Ensures excellent target uniformity for best ILS calibration
Scanner disturbance minimizers	Avoids zero-velocity points of interferometer turnaround using scanner peak torques
Light baffles	Ensure stray light does not negatively impact calibration
Accurate temperature sensors	Improve calibration corrections using large number of sensors
Fixed-rate sampling	Simplifies onboard processing while ensuring low noise

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TANSO-FTS-2 Greenhouse Gas Observing Satellite-2 Payload