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The interferometric monitor for greenhouse gases (IMG) was the precursor of the high-resolution Fourier-transform infrared radiometer (FTIR) onboard a satellite for observation of the Earth. The IMG endured the stress of a rocket launch, demonstrating that the high-resolution, high-throughput spectrometer is indeed feasible for use onboard a satellite. The IMG adopted a newly developed lubricant-free magnetic suspension mechanism and a dynamic alignment system for the moving mirror with a maximum traveling distance of 10 cm. We present the instrumentation of the IMG, characteristics of the movable mirror drive system, and the evaluation results of sensor specifications during space operation.

Highlights Assess role of techno-scientific expertise in governing urban environmental change. Evaluate evidence-driven built environment and greenspace policy in Fukuoka. Epistemic community shapes Fukuoka’s built environment and greenspace policy. Local history gives favourable context for environmental science in public interest. Findings nuance understanding of how epistemic communities work at urban scale.