ISRO: Countdown begins for IRNSS-1H navigation satellite launch, know how and when to watch online streaming

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Published: August 31, 2017 2:10:25 PM

ISRO is going to launch India's navigation satellite IRNSS-1H using its PSLV C-39 today at 7 PM. The 29-hour countdown had begun yesterday at 2 PM.

ISRO launch, ISRO IRNSS 1H, IRNSS 1H, ISRO, satellite launch, navigation satellite, PSLV C39, ISRO PSLV, PSLV, ISRO launch watch, ISRO website, ISRO gov in, ISRO launch live, isro live, isro launch live streamingThe 1.4-tonne IRNSS-1H will be launched by ISRO today. (Image: ISRO)

ISRO is going to launch India’s navigation satellite IRNSS-1H using its PSLV C-39 today at 7 PM. The 29-hour countdown had begun yesterday at 2 PM. According to ISRO, the Mission Readiness Review (MRR) committee and Launch Authorisation Board (LAB) had given its approval. So, Indian Space Research Organisation will launch the IRNSS-1H (Indian Regional Navigation Satellite System) weighing 1,425 kg with its PSLV launch vehicle. This satellite will basically replace the IRNSS-1A, as its atomic clocks have failed, according to an Indian Express report.

The 1.4-tonne satellite will be launched from the state-run Indian Space Research Organisation’s (ISRO) spaceport at the Satish Dhawan Space Centre (SDSC) in Sriharikota in Andhra Pradesh, about 80 km northeast of Chennai. The launch will take place from the second launch pad of Satish Dhawan Space Centre (SDSC) SHAR. The IRNSS positioning system is intended to provide two services – Standard Positioning Service (SPS) for general users and a Restricted Service (RS), which is an encrypted service provided only for authorised users like the defence forces.

How to watch ISRO’s IRNSS-1H launch? You can watch the online live streaming of the PSLV C-39 launch on ISRO’s official website ( You can also directly go to the webpage: ““. The duration of the launch event will be approximately 8 minutes and 40 seconds.

Also read | ISRO to launch IRNSS-1H today: Know about India’s own GPS first time made by private sector

Which TV channels will show the ISRO’s IRNSS-1H launch? You can catch the ISRO launch on two channells: 1. Doordarshan National and 2. Loksabha TV.

Also read | ISRO to launch new navigation satellite IRNSS-1H as replacement after clock failure

IRNSS is a part of NavIC or Navigation Indian Constellation. NavIC is designed to provide accurate position information service to users in India as well as a region extending up to 1500 km from its boundary. IRNSS 1A, the first of the seven IRNSS satellites that was launched on July 1, 2013, had malfunctioned, rendering the satellite ineffective. While seven satellites were to form the Navigation Indian Constellation or NavIC, two satellites were meant to be replacements.

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