Megha-Tropiques (abbreviated MT) is a French-Indian satellite that will study the thermal energy exchanges between oceans and the atmosphere in the tropical zone to better understand their impact on climate. The satellite is expected to operate for 3 years. The data will be exploited both in India and in France.

Megha-Tropiques is a joint mission between the French (CNES) and Indian (ISRO) space agencies. The very name Megha-Tropiques is a testimony of this cooperation since Megha means "cloud" in Sanskrit, and Tropiques "tropics" in French.

The instruments embarked on the satellite are the Madras imaging radiometer, designed by Isro and CNES. It collects data on rain, water vapor, and clouds; the Saphir sounding radiometer, developed by CNES, measures the vertical profile of humidity in the atmosphere; and the Scarab broadband radiometer, also developed by CNES, will perform measurements of the Earth's radiation balance.

Thermal energy exchanges between the oceans and the atmosphere in the tropical zone have repercussions on the climate of the entire planet. However, knowledge of the interactions between the water cycle and atmospheric circulation is limited, and predictions of climate events in the tropical zone (tropical cyclones, monsoons, floods, or drought) are uncertain. The study of the energy balance in this region of the globe has become a priority in the study of climate.

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