Information About IRNSS And Its LaunchIRNSS - 1I is the eighth satellite of Indan Regional Navigation System ( IRNSS ) constellation. In actual IRNSS - 1I is the ninth satellite that launched IRNSS constellation but it is counting as eighth satellite because IRNSS - 1I is an eighth satellite that has launched successfully IRNSS constellation. ISRO already launched IRNSS - 1A, IRNSS - 1B, IRNSS - 1C, IRNSS - 1D, IRNSS - 1E, IRNSS - 1F, IRNSS - 1G, IRNSS - 1H. But due to some technical error IRNSS - 1H could not launch successfully and PSLV placed the satellite into a lower than expected orbit. According to reports collected from media, the satellite was also stuck inside the rocket's fairing which prevented the IRNSS - 1H from deploying as planned. As the the launch of IRNSS - 1H is failed, so we do not count it for IRNSS constellation.
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Just nineteen minutes after the successful launch of IRNSS - 1I moved into an orbit that will transfer the satellite into its final orbit which is geosynchronous orbit.Currently it is moving in a temporary sub-geosynchronous oval path about 281.5 km x 20,730 km from the Earth and inclined 19.2 degrees to the Equator, In few upcoming days, the orbit maneuvers will be performed from Master Control Facility ( MCF ) to position the satellite, gradually pushed in the coming days into a geosynchronous circular orbit 36,000 km away, over 55° East longitude in the planned geostationary orbit, at an inclination of 29 degrees of the equator , ISRO said. After initial orbit raising maneuvers, IRNSS - 1I will join the IRNSS constellation to provide the navigation services.
How IRNSS - 1I Satellite Will Work?Like its predecessor, IRNSS - 1I has two types of payloads, navigation payload and the ranging payload. The navigation payload operating in the S and L5 bands transmits the navigation signals to the users. The ranging payload comprises of transponder which is operated in CDMA mode for two - way range measurements. The IRNSS satellites continuously emites time stamped navigation signals, which are received by the ground-based user receivers. The information is then processed by the receivers to derive their own position, velocity and time.The system provides the seamless 24 by 7 services under all weather condition.
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