Testing, Verification and Calibration of the Thermal and Near Infrared Sensor for Carbon Observation Fourier Transform Spectrometer (TANSO-FTS-2) Sensor

TANSO-FTS-2 is the primary instrument aboard the Greenhouse gases Observation Satellite-2 (GOSAT-2). It measures high-resolution spectra of upwelling earth radiance in five spectral bands to extract concentrations of greenhouse gases (CO2, CH4) and artificial emission sources. The development, testing and ground calibration of TANSO-FTS-2 was performed by Harris Corporation under a subcontract to Mitsubishi Electric Corporation, the GOSAT-2 prime contractor of the Japan Aerospace Exploration Agency (JAXA) GOSAT-2 project. This paper will summarize the functionality, test methodology, test results and calibration performance of the TANSO-FTS-2. This includes details of the system signal to noise ratio (SNR), instrument line shape (ILS), linearity, polarization, field-of-view (FOV) and scanner performance testing. Also included are expected calibration error and line of sight (LOS) performance. A summary of the TANSO-FTS-2 modules and nominal on-orbit operational scenario will also be discussed, including a description of intelligent pointing functionality and expected performance.