Emisat Current Affairs - 2020

EMISAT adds to India’s Defence Capability

After the successful test of A-SAT through Mission Shakti, India’s defence capability has got a further boost with the successful launch of the ElectroMagnetic Intelligence Satellite (EMISAT).


  • EMISAT was jointly developed by ISRO and DRDO, two frontline research agencies of the country.
  • EMISAT will allow India to intercept the radars by detecting the electromagnetic rays from “enemy radar”.
  • EMISAT will cater to India’s strategic defence needs by strengthening the armed forces ability to intercept radar signals and gauge a variety of parameters and understand various details.
  • EMISAT will allow India to know what kind of radar is at work on the other side, based on the spectrum and we will be able to read the distance between the radar and Indian assets too.
  • The satellite has been placed in the Low Earth Orbit (LEO) at an orbit about 700 km from Earth as the objective is to detect low power radar signals. Such radars are typically used to track by low-altitude air-borne vehicles, including aircraft and drones.

The Ministry of Defence had initiated the development of the satellite under the project titled Kautilya, which was first openly acknowledged in 2013-14. But the DRDO has since maintained secrecy about the project.

ISRO Successfully launched Emisat Satellite into Orbit

The Indian Space Research Organisation (ISRO) has successfully launched an electronic intelligence satellite ‘Emisat’ for the Defence Research Development Organisation (DRDO) along with 28 third party satellites.

About the Launch

The notable aspects of the launch were a new variant of the Polar Satellite Launch Vehicle (PSLV); switching off and on the fourth stage engine couple of times; and the use of the fourth stage as an orbital platform carrying three experimental payloads.

PSLV first placed the 436 kg Emisat into a 749 km orbit. Then the rocket was brought down to put the 28 satellites into orbit, at an altitude of 504 km.

Then the rocket was brought down further to 485 km where the fourth stage/engine transformed into a payload platform carrying three experimental payloads:

  • Automatic Identification System (AIS) from ISRO – for maritime satellite applications capturing messages transmitted from ships.
  • Automatic Packet Repeating System (APRS) from AMSAT (Radio Amateur Satellite Corporation), India – to assist amateur radio operators in tracking and monitoring position data.
  • Advanced Retarding Potential Analyser for Ionospheric Studies (ARIS) from Indian Institute of Space Science and Technology (IIST) – for the structural and compositional studies of the ionosphere.

For the first time, the launch also demonstrated new technology of putting payloads into three different orbits with a new variant of the Polar Satellite Launch Vehicle (PSLV) rocket.