mark me as brainlistExplanation:The indigenously built INSAT-2A had one and a half times the service capability of the earlier INSAT-1 satellites and weighed almost twice at launch! Like INSAT-1 satellites, it too carried transponders for telecommunications, TV broadcasting and an INSTRUMENT for weather observation. Besides, it carried another special instrument capable of sensing distress signals sent by special transmitters in vehicles and even held by INDIVIDUALS in danger. As time progressed, three more satellites were launched in the INSAT-2 series. They also carried ‘MOBILE service transponders’ to facilitate communication between vehicles and stationary users. Special mention has to be MADE about GSAT-3 or EDUSAT, which was a satellite dedicated to the field of education. It facilitated the PROVISION of quality educational services to rural students through ISRO’s tele-education programme. Today, there are about 56,000 classrooms in the EDUSAT network. Another such service provided by INSAT/GSAT satellites today is the telemedicine service. ISRO’s telemedicine programme links doctors at super specialty hospitals in urban areas to patients at rural hospitals through audio/video facilities via satellite. One more interesting aspect of GSAT series of satellites is that GSAT-8 and 10, launched in 2011 and 2012, respectively, carry a ‘GAGAN’ transponder that broadcasts navigation signals. GAGAN programme boosts the quality, reliability and availability of navigation signals broadcast by American GPS series of navigation satellites. In addition to communication satellites, India has built another type of satellite called the remote sensing satellites. In fact, India has emerged as one of the world leaders in the field of remote sensing satellites.