ISRO launching 103 satellites: Making world record !

satellite and earth

The Indian Space Research Organization (ISRO) will set a record when it launches 103 satellites in one go on a single rocket in the first week of February.

There will be only 3 foreign satellites, and 100 micro satellites.

Some facts about satellite launch:

  1. Last year, ISRO launched record 20 satellites at one go.
  2. The PSLV (polar satellite launch vehicle) will carry 100 micro satellites and the weight of PSLV will be equal to 1,350. 500-600 kg of satellite and the rest is of launching vehicle.
  3. The satellites will be separated from the launch vehicle in different directions. The separation angle and time of separation will be such that one satellite will not collide with another, said Dr. K. Sivan, Director of the Vikram Sarabhai Space Centre (VSSC), Thiruvananthapuram.
  4. The three Indian satellites to be launched are Cartosat-2 series (weighing 730 kg as primary payload) and INS-IA and INS-1B (weighing 30 kg each).
  5. ISRO had earlier planned a launch of 83 satellites in the last week of January. But that launch was postponed and now ISRO is launching 103 satellites.
  6. ISRO is breaking its own record with this launch. Last year the space agency had launched record 20 satellites in one go.
  7. The highest number of satellites launched in a single mission are 37, a record that Russia set in 2014. The US space agency, NASA launched 29.

It may sound simple that space organizations are launching satellites but the process is not that simple.


The satellite separated from the launch vehicle will have a relative velocity of one meter per second. So, after 1,000 seconds the distance between a satellite and the rocket will be 1,000 meters. The satellite that gets launched first will move at a relatively faster velocity than the next satellite that is launched. Due to different relative velocities, the distance between the satellites will increases continuously but the orbit will be the same. From the study of relative motion ISRO is going to launch all the satellites.

Do you know what escape velocity is of satellite?

Image result for escape velocity

Escape velocity is the minimum speed needed for an object to escape from a massive body, in the sense of becoming neither on the surface nor in closed orbit of any radius, no matter how great, without the aid of thrust, or suffering the resistance from friction. The escape velocity from Earth is about 11.186 km/s at the surface.(wiki)

There are lots of things they have to manage before sending any satellite in the space. And the work did not end here. After sending the satellites they have to manage lot of things that will happen to them in the space.

ISRO will be the first space organization to launch more than 100 satellites in one go.


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