Question

Differentiate between IRS and INSAT series of satellites.

Answer 1

IRS	INSAT Series of Satellites
It stands for Indian Remote Sensing.	It stands for Indian National Satellite System.
The sensors recording the energy that they receive are placed in a near-polar sun-synchronous orbit at an altitude of 700 – 900 km. These satellites are known as remote sensing satellites.	As against these satellites, the weather monitoring and telecommunication satellites are placed in a Geostationary position (the satellite is always positioned over its orbit that synchronizes with the direction of the rotation of the earth) and revolves around the earth (coinciding with the direction of the movement of the earth over its axis) at an altitude of nearly 36,000 km (e.g. INSAT series of satellites).
Indian Remote Sensing (IRS) satellite system was commissioned with the launch of IRS-1A, in 1988. With ten satellites in operation, IRS is the largest civilian remote sensing satellite constellation in the world. Indian Remote Sensing (IRS) satellite system was commissioned with the launch of IRS-1 A, in 1988.	The Indian National Satellite (INSAT) system which are placed in Geo-stationary orbits is one of the largest domestic communication satellite systems in the Asia-Pacific region. Established in 1983 with the commissioning of INSAT-1B, it initiated a major revolution in India’s communications sector and sustained the same later. INSAT space segment consists of 24 satellites out of Which 10 are in service (INSAT-2E, INSAT-3A, INSAT-4B, INSAT-3C, INSAT-3E, KALPANA-1, INSAT-4A, INSAT-4CR, GSAT-8 and GSAT-12).