ISRO To Launch Back-up Navigation Satellite IRNSS-1H By August End


ISRO will launch a backup satellite IRNSS-1H:

Indian Space Research Organisation (ISRO) is planning to launch its navigation satellite IRNSS-1H by the end of August in order to replace the existing seven satellites of NavIC constellation.

ISRO launches back up satellite IRNSS-1H.
Image – Google.

ISRO had launched seven satellites, which are:-

  1. IRNSS-1G on April 28, 2016
  2. IRNSS-1F (March 10, 2016)
  3. IRNSS-1E (January 20, 2016)
  4. IRNSS-1D (March 28, 2015)
  5. IRNSS-1C (October 16, 2014)
  6. IRNSS-1B (April 4, 2014)
  7. IRNSS-1A on July 1, 2013.

According to ISRO officials, the total cost of all the seven satellites was therefore about Rs 1,420 crore.

About the Satellite:

The Navigation Indian Constellation (NavIC) is an independent regional navigation satellite system.

Indian Space Research Organisation (ISRO) launch navigation satellite IRNSS-1H
Image – Google.

ISRO thus designed it to provide accurate position information service to users in India as well as the region extending up to 1,500 km from its periphery.

Each satellite had three clocks and total 27 clocks as a part of the navigation satellite system. Besides they were important to provide precise data.

Each satellite had three clocks and total 27 clocks as a part of the navigation satellite system
Image – Google.

The space organisation found it important to replace it instantly and thus decided to launch one of the two spare satellites as efforts to restart the failed clocks.

Reports say this launch will therefore possibly make the system fully operational.

Reasons behind the launch:

Replacing IRNSS-1A became a priority for the ISRO in January 2017 since all the three rubidium atomic clocks on board stopped functioning.

Reasons behind the launch is  three rubidium atomic clocks on board stopped functioning
Image – Google.

So the space agency decided on launching one of the two spare satellites as soon as the initial efforts to restart the clocks failed.

Highlights:

  • IRNSS-1A, one of the seven satellites in the constellation of the regional navigation system, suffered a technical fault as atomic clocks on board and failed as well.
  • Isro is, therefore, planning to replace IRNSS-1A with 1H since atomic clocks are the important ingredient for obtaining precise data.

ISRO’s views:

A.S. Kiran Kumar, Chairman of Indian Space Research Organisation (ISRO) said, “The atomic clocks have failed in only one satellite.

ISRO will be launching the spare satellite
Image – Google.

We will be launching the spare satellite this year. All other six satellites are operational and are providing the navigation data”.

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