The Indian Space Research Organisation (ISRO) has launched four satellites, named Megha-Tropiques satellite, VesselSat-1, Jugnu and SRMSat, on a Polar Satellite Launch Vehicle-C18 (PSLV-C18) from Satish Dhawan Space Centre.

The Megha-Tropiques satellite, developed jointly by ISRO and CNES, the French national space agency, carried three payloads and a complementary scientific instrument with a five-year life time and will study climatic and atmospheric conditions in the tropics and help predict monsoons, cyclones, floods and droughts.

The 28.7kg VesselSat-1 from Luxembourg will help locate ships in sea lanes and the 3kg Jugnu from IIT Kanpur will focus on imaging the Earth in the near-infrared region.

The 10.9kg SRMSat from SRM University will attempt to address global warming and pollution by monitoring carbon dioxide and water vapour levels in the atmosphere.