Placing these satellites at the sun-synchronous polar orbit (about 200-1,200 km above the Earth 's surface) helps in better scanning of the earth. However, some of these satellites have also been put in the geo orbit," the source said. "The 13 satellites used by the military for surveillance include Cartosat 1 and 2 series and," the Isro source said.The Navy also uses Gsat-7 for real-time communication among its warships, submarines, aircraft and land systems. Technologies are making modern warfare more or less contactless and more and more dependent on surveillance and remote sensing, real-time situational awareness, information processing and communication. Satellites have, therefore, emerged as stratagic assets playing a critical role in the outcome of war, making the spatial technological abilities not just important but a game changer."

Source: Times of India June 25, 2017 18:56 UTC