<P> Following the successful demonstration flights of Bhaskhar and Bhaskara - 2 satellites launched in 1979 and 1981, respectively, India began to develop the indigenous Indian Remote Sensing (IRS) satellite program to support the national economy in the areas of agriculture, water resources, forestry and ecology, geology, water sheds, marine fisheries and coastal management . </P> <P> Towards this end, India had established the National Natural Resources Management System (NNRMS) for which the Department of Space (DOS) is the nodal agency, providing operational remote sensing data services . Data from the IRS satellites is received and disseminated by several countries all over the world . With the advent of high - resolution satellites new applications in the areas of urban sprawl, infrastructure planning and other large scale applications for mapping have been initiated . </P> <P> The IRS system is the largest constellation of remote sensing satellites for civilian use in operation today in the world, with 11 operational satellites . All these are placed in polar Sun - synchronous orbit and provide data in a variety of spatial, spectral and temporal resolutions . Indian Remote Sensing Programme completed its 25 years of successful operations on March 17, 2013 . </P> <P> Data from Indian Remote Sensing satellites are used for various applications of resources survey and management under the National Natural Resources Management System (NNRMS). Following is the list of those applications: </P>

When was the first indian remote sensing satellite launched into space