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ISRO to launch Earth Observation Satellite (EOS)


The Indian Space Research Organisation (ISRO) will launch an Earth Observation Satellite in August 2021 from the Satish Dhawan Space Centre, SHAR, at Sriharikota.


Prelims, GS-III: Science and Technology (Space Technology)

Dimensions of the Article:

  1. Earth Observation Satellites
  2. ISRO and EOS
  3. About the EOS-3 set to be launched in 2021

Earth Observation Satellites

  • An Earth Observation Satellite or Earth Remote Sensing Satellite is a satellite used or designed for Earth Observance (EO) from orbit, including spy satellites and similar ones intended for non-military uses such as environmental monitoring, meteorology, cartography and others.
  • The most common type are Earth imaging satellites, that take satellite images, analogous to aerial photographs; some EOS satellites may perform remote sensing without forming pictures, such as in GNSS radio occultation.
  • The first occurrence of satellite remote sensing can be dated to the launch of the first artificial satellite, Sputnik 1, by the Soviet Union in 1957.


  • Starting with IRS-1A in 1988, ISRO has launched many operational remote sensing satellites.
  • Currently 13 operational satellites are in Sun-synchronous orbit – RESOURCESAT-1, 2, 2A CARTOSAT-1, 2, 2A, 2B, RISAT-1 and 2, OCEANSAT-2, Megha-Tropiques, SARAL and SCATSAT-1, and *four* in Geostationary orbit- INSAT-3D, Kalpana & INSAT 3A, INSAT -3DR.
  • The data from these satellites are used for several applications covering agriculture, water resources, urban planning, rural development, mineral prospecting, environment, forestry, ocean resources and disaster management.

About the EOS-3 set to be launched in 2021

  • The satellite, EOS-03, will be carried on board the 14th flight of the GSLV, the GSLV-F10, and will place the satellite in a Geosynchronous Transfer Orbit.
  • The satellite will reach the final geostationary orbit using its onboard propulsion system.
  • The EOS-03 is a state-of-the-art agile satellite that would enable real-time monitoring of natural disasters such as floods and cyclones, monitoring of water bodies, crops, vegetation condition, forest cover changes among others.
  • This will only be the second launch for ISRO in 2021 as work has been hit by the COVID-19 restrictions.

-Source: The Hindu

February 2024