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Topics Covered:

  1. Indigenization of technology.
  2. Awareness in space.




What to study?

For Prelims and Mains: Key features and significance of the mission.


Context: The Indian Space Research Organisation (ISRO) has launched the country’s first electronic surveillance satellite, EMISAT.

  • It was launched on-board PSLV-C45. As many as 28 small satellites of international customers were also put in space as secondary riders.

How does EMISAT work?

EMISAT is an advanced electronic intelligence (ELINT) satellite jointly developed by ISRO-DRDO. It is meant for electromagnetic spectrum measurements.

It is modelled after a famous Israeli spy satellite called SARAL (Satellite with ARgos and ALtika). Both these satellites have the SSB-2 bus protocol — the core component for their sharp electronic surveillance capabilities across the length and width of a large country like India.

EMISAT also has a special altimeter (a radar altitude measuring device) called ‘AltiKa’ that works in the Ka-band microwave region of the spectrum. The electronic surveillance payload of EMISAT was developed under a DRDO’s project called KAUTILYA.

The main capability of EMISAT is in signal intelligence — intercepting signals broadcasted by communication systems, radars, and other electronic systems. The Ka-band frequency that EMISAT is sensitive to, allows the 436-kg EMISAT — India’s newest spy in the sky — to scan through ice, rain, coastal zones, land masses, forests and wave heights with ease.


Many First In The Launch:

  1. First time ISRO is launching satellites in three different orbits.
  2. The PSLV-C45 launch vehicle is also the first PSLV rocket to use four strap-on motors. The four strap-on motor rockets are from the PSLV-QL range.
  3. This is the first time it has been envisaged to provide a microgravity environment for research organizations and academic institutes to perform experiments.
  4. The PSLV-C45 is also the first launch to use solar panels to make the fourth stage last longer in orbit. Using the solar panels in the fourth stage, the PSLV can provide power to attached payloads almost indefinitely.
  5. PSLV-C45: First Launch Vehicle to Use Solar Propulsion.


Sources: the hindu.