Successful Indian navigation satellite launch
The Indian Regional Navigation Satellite System (IRNSS) has gained a further satellite.
The Indian Space Reserach Organisation (ISRO) PSLV-C41 rocket launched India's 8th regional navigation satellite - IRNSS-1I - from Sriharikota at 0404 local on 12 April (2234 UTC on 11 April). The launch is reported to have taken place in 4 stages, placing the satellite into its intended orbit after 19 minutes.
IRNSS-1I is intended to replace the first regional navigation satellite, IRNSS-1A, whose 3 European-made rubidium atomic clocks had all failed 2 years ago. IRNSS-1I weighs 1,425 kg and has a designed life-span of 10 years. ISRO had attempted to launch a replacement satellite - IRNSS-1H - on 31 August 2017, but the satellite got stuck in its heat shield; it has now been designated as space debris.
IRNSS is designed to provide position, velocity and time information for the Indian landmass as well as a region extending up to 1,500 km (~810 NM) from its boundary. Using L-5 and S-bands, accuracy is quoted as 5-20 m.
Although operational, the ISRO Chairman explains that IRNSS is not as popular as GPS because the receiver and mobile chipsets needed for access have not been commercialised. But ISRO has created an app which will be released soon, and is asking industry and institutions to come forward 'to take such navigation applications to the user community'.
Further details from the link below . .