ISRO places three satellites in orbit in first launch of 2022

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ISRO places three satellites in orbit in first launch of 2022

  • Indian Space Research Organisation (ISRO) successfully launched its earth observation satellite EOS-4 and two co-passenger technology demonstrator and scientific satellites from the first launch pad at the country’s only spaceport in Sriharikota, Andhra Pradesh.
  • The launch starts a busy calendar for the Indian space agency, which has lined up as many as 19 launches this year, after two years of lull caused by the Covid19 pandemic.

About EOS-04 satellite

  • It is the fourth in a series of earth observation satellites that are being launched under a new generic name.
  • The 1,700 kg EOS-04 is a radar imaging satellite capable of providing high-quality images under all weather conditions.
  • The satellite has a mission life of 10 years.
  • Like EOS-01, EOS-04 will be placed in a sun synchronous polar orbit of 529 km, is a radar-imaging satellite which would have made it a part of the RISAT series earlier.
  • In fact, it would replace the RISAT-1 which was launched in 2012 but has been non-functional for the last few years.
  • RISATs use synthetic aperture radars to produce high-resolution images of the land.
  • One big advantage that radar imaging has over optical instruments is that it 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, making it suitable for surveillance.
  • ISRO said that the EOS-04 was designed to provide high-quality images for applications such as agriculture, forestry and plantations, flood mapping, soil moisture and hydrology.
  • It will complement the data from Resourcesat, Cartosat and RISAT-2B series of satellites that are already in orbit.

New naming system

  • Two years ago, ISRO had moved to a new naming system for its earth observation satellites which till then had been named thematically, according to the purpose they were meant for.
  • The Cartosat series of satellites were meant to provide data for land topography and mapping, while the Oceansat satellites were meant for observations over sea.
  • Some INSAT-series, Resourcesat series, GISAT, Scatsat, and a few other earth observation satellites were named differently for the specific jobs they were assigned to do, or the different instruments that they.
  • All these would now become part of the new EOS series of satellites.
  • Land and forest mapping and monitoring, mapping of resources like water or minerals or fishes, weather and climate observations, soil assessment, and geospatial contour mapping are done through these satellites.
  • However, only the first of these newly named satellites, EOS-01, launched in November 2020, is in orbit right now.
  • EOS-02, a micro-satellite to be flown on a new launch vehicle called SSLV (Small Satellite Launch Vehicle) is yet to be launched, while launch of EOS-03 had ended in a failure in August last year.

Other satellites launched


  • It is a student satellite developed by the Thiruvananthapuram-based Indian Institute of Space Science and Technology in collaboration with the University of Colorado in the United States where it was assembled and tested.
  • Students from Nanyang Technological University in Singapore and National Central University of Taiwan have also contributed.
  • This satellite will study the dynamics of the upper atmosphere and carries an X-ray spectrometer for studying solar flares.


  • It is a technology demonstrator for the first India-Bhutan joint satellite that is scheduled to be launched next month.
  • The two countries had signed a space agreement last year, and its first outcome would be the launch of BhutanSat, or INS-2B, on a PSLV rocket in March.
  • The INS-2TD that will fly on Monday has a thermal imaging camera meant for earth observation purposes, like assessment of land and water surface temperature, and identification of forest and tree cover.

Indian satellites in space

  • India currently has 53 operational satellites, of which 21 are earth observation ones and another 21 are communication-based.
  • Eight are navigation satellites, while the remaining three are science satellites, according to information provided by the government in Parliament.
  • Monday’s 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.