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EMISAT: ISRO to Launch Advanced Electronic Intelligence Satellite in April 2019

Date: 25 March 2019 Tags: Space

Indian Space Research Organisation (ISRO) will launch electronic intelligence satellite Emisat of Defence Research and Development Organisation (DRDO) on 1 April 2019. It will be launched along with 28 third party satellites on board of new variant of Polar Satellite Launch Vehicle (PSLV) rocket with four strap-on motors.


  • The main passenger (payload) of this PSLV rocket will be DRDO's electronic intelligence satellite 'Emisat', weighing about 420 kg.
  • The remaining 28 satellites will cumulatively weigh about 250 kg. These satellites include 24 from US, 2 from Lithuania and one each from Spain and Switzerland).

Significance of this mission

  • ISRO for first time will demonstrate its new technologies like three different orbits with this new variant of PSLV rocket.
  • In this case, this PSLV rocket will place satellites in three different orbits. It will first place Emisat Satellite at altitude of 763 km.
  • Then PSLV rocket will be brought down to put 28 satellites into orbit at altitude of 504 km.
  • Following that the rocket will be brought down further to 485 km where fourth stage will turn into payload platform carrying three experimental payloads.
  • These experimental payloads will include (i) Automatic Identification System (AIS): It is from ISRO for Maritime satellite applications capturing messages transmitted from ships (ii) Automatic Packet Repeating System (APRS): It is from AMSAT (Radio Amateur Satellite Corporation), India. It will to assist amateur radio operators in tracking and monitoring position data and (iii) Advanced Retarding Potential Analyser for Ionospheric Studies (ARIS): It is from Indian Institute of Space Science and Technology (IIST). It will be used for structural and compositional studies of ionosphere.
  • The whole flight sequence will take around 180 minutes after rocket's lift off from

Emisat Satellite

  • It has been developed by DRDO. It is based on ISRO's Indian Mini Satellite-2 (IMS-2) bus platforms.
  • It will be deployed for the task of discovering enemy radars and collecting imagery and communication intelligence.
  • Applications: It will help to monitor activities of enemy radars and sensors deployed along the border. It will help to know the exact topography of enemy areas. It will provide communication intelligence to find out how many communication devices are active in an area
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