Tomorrow, ISRO's second bid to launch satellite made with private help

ISRO to launch navigation satellite on Arpil 12

ISRO to launch navigation satellite on Arpil 12

It was a normal lift-off, officials said.

ISRO successfully launches navigation satellite IRNSS-1I by PSLV-C41 from Sriharikota; Satellite to give alert messages to fishermen regarding bad weather, high waves or when they approach worldwide maritime boundary line.

Indian Regional Navigation Satellite System (IRNSS) has the operational name of NAVIC or Navigation with Indian Constellation.

The Indian Space Research Organisation (ISRO) will make a second attempt Thursday to launch a satellite that has had its assembly, integration, and testing (AIT) done by private companies. On August 31, 2017, it had sent IRNSS-1H but the mission failed after the heat shield covering the satellite failed to separate.

ISRO on Thursday successfully launched navigation satellite IRNSS-1I, by PSLV-C41 rocket from Satish Dhawan Space Centre at Sriharikota.

This new launch comes after when, ISRO is scrambled in explaining the failure of the previous GSAT 6A satellite.

NavIC, also known as Indian Regional Navigation Satellite System (IRNSS), is an independent regional navigation satellite system created to provide position information in the Indian region and 1500 km around the Indian mainland.

Each satellite has three rubidium atomic clocks and a total of 27 clocks for the navigation satellite system (including the standby satellites) were supplied by the same vendor.

The NavIC constellation has three satellites in circular geostationary orbits over the equator, and four craft in inclined orbits - like IRNSS 1I - that oscillate north and south of the equator, ensuring multiple satellites are always high in the sky over the Indian subcontinent. IRNSS 1I is also heading to the same slot in the Indian navigation constellation that was intended for the spacecraft lost on the failed launch in August. The former, operating in L5-band and S-band, will transmit navigation service signals to the users. It also carries Corner Cube Retro Reflectors for LASER Ranging. The space agency plans to install signal receivers on the ground, which will give weather alerts to fishermen in the sea and will also help them in positioning.

According to ISRO, NavIC is useful for fishermen to reach potential fishing areas. It is also used for other applications like location-based services, survey and alignment, and time synchronised services. An inquiry later found an explosive had failed to detonate fully, to break the latch of the heat case or conical top of the PSLV, where satellites are housed as they are carried into space. Wednesday's flight was the second launch by ISRO in less than two weeks, after the March 29 liftoff of a Geosynchronous Satellite Launch Vehicle Mk.2, a more powerful rocket than the PSLV.

Each satellite has a life span of 10 years.

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