Satellite observations have become an essential and integral component of weather & climate monitoring and prediction. Satellites have provided observations over a multitude of domains: inaccessible zones especially hazardous weather systems like cyclone, extreme rainfall events, clouds and precipitation, large scale circulations, atmospheric chemistry, cryospheric studies, global warming, climate change and land-ocean-atmosphere interactions. Further, the assimilation of satellite data into numerical weather prediction models has enhanced the accuracy, skill, and prediction lead time. The global satellite system for weather and climate studies include: a constellation of operational geostationary satellites, a constellation of operational Low-Earth orbit sun synchronous satellites and other advanced and especially designed sensors like Scatterometers, Radars Altimeters, Radio-occultation sounders, Earth radiation budget instruments, LIDARs, Hyperspectral Imagers, and future generation satellite sensors.

India has been one of the frontrunners in space based earth observations and weather monitoring. INSAT series of satellites, with Kalpana-1 being the first dedicated meteorological satellite and INSAT-3DR the latest one to join the geostationary club provide observations of weather parameters over India and surrounding regions at every 15-minute interval. The very high resolution imager and sounder provide 3?dimensional information of the atmosphere in multiple spectral bands. The data from this constellation is used operationally for providing a myriad of geophysical parameters for various applications including weather forecasting through assimilation in numerical models. The recently launched Scatsat-1 carrying Ku band scatterometer provides ocean surface winds. Synthetic Aperture Radar onboard RISAT-1 is used to provide crucial climatic information regarding sea-ice displacement as well as other ocean parameters. Other satellites like Megha-Tropiques (SAPHIR, ROSA, SCARAB) and SARAL (Ka band Altimeter) also provide complementary observations. New avenues for weather forecasting are also being explored through Global Navigation Satellite System based techniques. Worldwide a large number of operational and experimental satellites are available for meteorological applications. Assimilation of satellite data in numerical models have significantly helped in forecasting and understanding various processes.

With this background, Indian Meteorological Society, Ahmedabad Chapter (IMSA) with Space Applications Centre (SAC), Ahmedabad has planned to organize an International Tropical Meteorology Symposium (INTROMET-2017). In-fact, TROPMET is being organized every year by IMS and every 3-4 years this event is organized as an International Symposium, called INTROMET. Coincidentally, SAC & IMSA will also be completing 25 years of the first TROPMET (1992) in Ahmedabad. The theme of INTROMET-2017 symposium is "Advancements in Space based Earth Observations and Services for Weather and Climate". It will provide a forum for weather and climate scientists to present their research, exchange ideas, for collaboration, and discussion on the current and futuristic aspects of space based weather and climate studies. The main areas of focus of the symposium are as follows (More details:

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