The Interferometric Monitor for Greenhouse Gases (IMG) is a sensor to monitor the earth's radiation balance, the temperature profile of the atmosphere, the temperature of the earth's surface, and physical properties of clouds. It was developed by the Japan Resources Observation System Organization (JAROS) for the Ministry of International Trade and Industry (MITI). IMG will obtain detailed spectra of thermal infrared radiation from the earth's surface and atmosphere. The detailed spectra measured by the IMG will be used to infer atmospheric concentrations of water vapor and other greenhouse gases. A global increase in tropospheric concentrations of trace gases, such as carbon dioxide, methane, nitrous oxide, and chlorofluorocarbons (CFCs) has been noted. These increases have been brought about by human activities. Now however we have limited knowledge of the magnitude or distribution of the anthropogenic sources of these gases. Two sources whose magnitude must be investigated are deforestation and biomass burning. IMG will map the global and regional distribution of emission sources by measruring variations in the concentrations of trace gases. Moreover, natural sources and sink strengths of trace gases may vary widely with different terrestrial and oceanic ecosystems.

Spectral range	714 - 3030cm(14-3.3mm)
Wave nomber resolution	0.1cm(opodized)
Absolute accuracy	1K or less
Stability of measurement	0.1K or less
Interferogram scan time	10sec
Sumpling per interferogram	100,000 or less
Mass	115kg or less
Power	150W or less
Approx.imate size	1000*800*500mm