ISRO to launch IRNSS-1H navigation satellite today at 7PM: Five facts you should know

The IRNSS-1H satellite will be launched with the PSLV-C38 rocket.

  • Published: August 31, 2017 9:53 AM IST
ISRO IRNSS-1H launch

The Indian Space Research Organization (ISRO) will be launching its navigation satellite, the IRNSS-1H. The launch will take place today at 7:00PM from the Satish Dhawan Space Centre in Sriharikota. The IRNSS-1H launch will be livestreamed on ISRO’s website from 6:25PM, and the duration will be for 8 minutes 40 seconds approximately. The event will be livestreamed in Hindi and English.

All about the IRNSS

The Indian Regional Navigation Satellite System (IRNSS) weighs over 1,400kg, and has been built and tested by ISRO. In addition, the satellite navigation system was developed by India along with US-based GPS. This satellite system offers services like terrestrial and marine navigation, disaster management, vehicle tracking, fleet management, navigation for hikers and travelers, and visual, voice navigation for drivers. This navigation system was named “NavIC (Navigation with Indian Constellation) by Prime Minister Narendra Modi.

The IRNSS satellites

ISRO has so far launched seven satellites under this system. The first satellite was the IRNSS-1A which was launched on July 1, 2013. The most recent launch was the IRNSS-1G which took off on April 28, 2016. So far, ISRO has spent a total of Rs 1,420 crore on all the seven satellites. ALSO READ: ‘Desi’ GPS to soon become a reality after ISRO signs MoU with CSIR-NPL

IRNSS-1H launch objective

The IRNSS-1H is a backup satellite for one of the seven satellites in the constellation, the IRNSS-1A as its three rubidium atomic clocks on board had stopped functioning. As the IRNSS-1H joins the constellation to begin providing navigation services, the IRNSS-1A will be used for messaging services. ISRO says that the IRNSS-1H has more flexibility in service and is compatible with other satellites in orbit. ALSO READ: ISRO announces 2 moon missions for early 2018

PSLV’s 41st flight

The IRNSS-1H satellite will be launched with the PSLV-C39 in its forty-first flight. The last PSLV mission was the PSLV-C38 rocket which launched with the Cartosat-2 series satellite. The IRNSS-1H satellite will be launched into a sub Geosynchronous Transfer Orbit (sub-GTO) with a 284 km perigee and 20,650 km apogee. RELATED: ISRO launches PSLV-C38 rocket with Cartosat-2 series satellite: Here are 5 key things you need to know

IRNSS-1H navigation satellite 

The IRNSS-1H carries one navigation payload and ranging payload. The navigation payload is functioned to transmit navigation service signals to the users, and will operate in L5-band and S-band. The navigation satellite is equipped with highly accurate Rubidium atomic clocks. The ranging payload, on the other hand will provide accurate determination of the range of the satellite. It consists of a C-band transponder, and Corner Cube Retro Reflectors for laser ranging. ALSO READ: ISRO’s GSAT-17 communication satellite launched: 10 facts you didn’t know

With inputs from agencies.

  • Published Date: August 31, 2017 9:53 AM IST