This Article is From Sep 26, 2016

ISRO's Rocket Takes Off Today, With 8 Satellites And a Big Challenge

ISRO's Rocket Takes Off Today, With 8 Satellites And a Big Challenge

Polar Satellite Launch Vehicle (PSLV-C35), will launch SCATSAT-1 for ocean and weather related studies.


  • ISRO will launch multiple satellites from 1 rocket into two orbits
  • Mission will also test PSLV's multiple burn capability
  • PSLV carrying 8 satellites - (India 3, Algeria 3, Canada 1 & US 1)
New Delhi: The Indian Space Research Organisation, or ISRO, is gearing up for its longest and most complex mission till date - launching multiple satellites from one rocket into two different orbits. Today, the 37th Polar Satellite Launch Vehicle or PSLV takes off from Sriharikota carrying 8 satellites - three from India, three from Algeria, and one each from Canada and the US.

Here are the Top 10 facts in this big science story:

  1. What makes this launch challenging is that most countries launch satellites in a single orbit. Even if multiple satellites are injected, it is in a sequential manner in the same orbit. The twin-orbit manoeuvre was recently accomplished by European Space Agency's Vega rocket.

  2. "This is a challenging two-in-one mission which puts India in a unique league of nations having the capability to achieve two different orbits in a single mission," ISRO Chairman Dr AS Kiran Kumar told NDTV.

  3. Exactly 17 minutes into the launch, the PSLV will drop off the Indian weather satellite SCATSAT at an altitude of 730 km. After this, 7 remaining satellites will be dropped at a height of 689 km.

  4. The mission will also test PSLV's multiple burn capability which will be utilized in the last leg and will set a new milestone for ISRO. The whole procedure is expected to be completed within 2 hours and 15 minutes -- the longest mission undertaken by ISRO.

  5. The stop-start of the rocket -- while travelling at a speed of more than 2660 kmph -- positions PSLV as a unique launcher in the multi-billion dollar commercial launch market. "It will open up new vistas to commercialise ISRO's launch capabilities for two-orbit configurations," said Dr K Sivan, Director of the Vikram Sarabhai Space Center. 

  6. The three Indian satellites include the earth observing satellite SCATSAT-1 and two others made by students to give them a hands-on experience in space technology.

  7. The SCATSAT, costing about Rs 120 crore, will help weather scientists forecast the formation of cyclones and monitor their land fall. India shares such data with the US, which helped them track Hurricane Sandy in 2012.

  8. Pratham, a 10-kg satellite developed by students of Indian Institute of Technology in Bombay, will study the total electron count in space. The 5.25-kg PISAT made by students of Bengaluru's PES University will take pictures of earth.

  9. Three Algerian satellites are for earth observation, the Canadian one to analyse and help reduce space debris and the American "Pathfinder" is an earth imaging microsatellite.

  10. In another first later this year, India hopes to launch its heaviest rocket, the Geo-synchronous Satellite Launch Vehicle Mark III, capable of taking up to 4 tonnes of communications satellite.