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ISRO carries out final orbit raising maneouvres of navigation satellite IRNSS-1I

 
PSLV-C41 lifting off with navigation satellite IRNSS-1I on board
 
 
Scientists at Indian Space Research Organisation (ISRO) successfully carried out last night the fouth and final orbit raising operation of its navigation satellite IRNSS-1I.
 
"The achieved perigee height is 35,462.9 km and apogee height is 35,737.8 km," ISRO said in an update posted on its website.
 
The 1425 kg satellite was placed in a geosynchronous transfer orbit (GTO) on April 12 by India's workhorse Polar Satellite Launch Vehicle (PSLV-C41) on April 12.
 
In its 43rd flight, PSLV  had lifted off at 0404 hours on that day from the first launch pad (FLP) at the Satish Dhawan Space Centre (SDSC) at Sriharikota in Andhra Pradesh. about 85 km from Chennai.
 
After a flight lasting about 19 minutes, the vehicle had achieved a sub-GTO with a perigee (nearest point to earth) of 281.5 km and an apogee (farthest point to earth) of 20,730 km inclined at an angle of 19.2 degrees to the equator, following which IRNSS-1I separated from PSLV.
 
After separation, the solar panels of IRNSS-1I were deployed automatically. ISRO's Master Control Facility (MCF) at Hassan, Karnataka took over the control of the satellite.
 
In the following days, orbit manoeuvres were performed from MCF to position the satellite at 55 degrees East longitude in the planned Geosynchronous Orbit with an inclination of 29 degrees to the equator.
 
IRNSS-1I is the eighth member of the Navigation with Indian Constellation (NavIC) system.  
 
Like its other IRNSS predecessors, IRNSS-1I also carries two types of payloads – navigation payload and ranging payload. The navigation payload of IRNSS-1I will transmit signals for the determination of position, velocity and time. This payload will operate in L5-band and S-band. Rubidium atomic clocks are part of the navigation payload of the satellite. 
 
The ranging payload of IRNSS-1I consists of a C-band transponder, which facilitates accurate determination of the range of the satellite. It also carries Corner Cube Retro Reflectors for LASER Ranging, ISRO said.
 
NavIC, also known as Indian Regional Navigation Satellite System (IRNSS), is an independent regional navigation satellite system designed to provide position information in the Indian region and 1500 km around the Indian mainland.
 
NNN
 
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