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EOS-04 launch, ISRO’s first of 2022:

GS Paper 3:

Topics Covered: Awareness in space.



Isro has successfully launched earth observation satellite EOS-04, two other satellites (INSPIREsat-1 and INS-2TD) onboard PSLV recently.

  • It was launched from the first launch pad at the country’s only spaceport in Sriharikota – Satish Dhawan Space Centre, Andhra Pradesh.



  • This is ISRO’s first launch in 2022.
  • It was the first mission since the failure of the GSLV F10 mission in August 2021.
  • This was the first mission of the space agency under the chairmanship of S Somanath.



The three satellites were injected successfully into a sun-synchronous polar orbit of 529 km.


About EOS-04:

EOS-04 is a radar imaging satellite capable of providing high-quality images under all weather conditions.

  • It can be used to capture images for agriculture, forestry, flood mapping, soil moisture and hydrology.
  • The satellite has a mission life of 10 years.


Advantages of radar imaging over optical instruments:

Radar imaging is unaffected by weather, cloud or fog, or the lack of sunlight. It can produce high-quality images in all conditions and at all times.


Current Affairs



INS-2DT is a technology demonstrator satellite, which has a thermal imaging camera and can help in the assessment of land and water surface temperatures apart from mapping vegetation.


InspireSat-1 satellite:

This satellite will use two instruments to study ionosphere dynamics and the Sun’s coronal heating process.


Difference between PSLV and GSLV:

India has two operational launchers- Polar Satellite Launch Vehicle (PSLV) and Geosynchronous Satellite Launch Vehicle (GSLV).

  • PSLV was developed to launch low-Earth Orbit satellites into polar and sun synchronous orbits. It has since proved its versatility by launching geosynchronous, lunar and interplanetary spacecraft successfully.
  • On the other hand, GSLV was developed to launch the heavier INSAT class of geosynchronous satellites into orbit. In its third and final stage, GSLV uses the indigenously developed cryogenic upper stage.


Current Affairs


How many satellites does India have in space?

  • India currently has 53 operational satellites, of which 21 are earth observation ones and another 21 are communication-based.
  • EOS-4 launch would be the 54th flight of the PSLV rocket, and the 23rd of its most powerful XL-version that has six strap-on boosters.


Insta Curious:

Did you know about Isro’s Telemetry Tracking and Command Network (ISTRAC) which is located in Bengaluru?



Prelims Link:

  1. What is radar imaging?
  2. What are earth- observation satellites?
  3. Differences between GSLV and PSLV.
  4. Applications of EOS-01.
  5. Differences between low earth orbit and geostationary orbits.

Mains Link:

Why is the Polar Satellite Launch Vehicle (PSLV)  one of the world’s most reliable space launch vehicles? How is it helping India commercially and technologically?

Sources: Indian Express.