India’s IRNSS-1D Launched into Orbit

March 30, 2015  - By

Photo credit: ISRO

The fourth satellite of IRNSS satellite navigation constellation, IRNSS-1D, was launched onboard PSLV-C27 on Saturday, March 28, according to the Indian Space Research Organization (ISRO). The Polar Satellite Launch Vehicle blasted off at 11:49 GMT (7:49 a.m. EST), or 5:19 p.m. local time, at the Satish Dhawan Space Center on India’s east coast.

This is the fourth successful launch of a navigation satellite in less than a week, following GPS IIF-9 on Wednesday and Galileo 7 and 8 on Friday. A fifth navigation satellite, for the BeiDou constellation, is expected to launch tomorrow.

This is the 28th consecutively successful mission of the PSLV, the ISRO said. The “XL” configuration of PSLV was used for this mission. Previously, the same configuration of the vehicle was successfully used seven times.

After the PSLV-C27 lift-off with the ignition of the first stage, the subsequent important flight events took place as planned. After a flight of about 19 minutes, 25 seconds, the IRNSS-1D satellite was injected to an elliptical orbit of  282.52 km X 20,644 km, very close to the intended orbit, and successfully separated  from the PSLV fourth stage.

After injection, the solar panels of IRNSS-1D were deployed automatically. ISRO’s Master Control Facility (at Hassan, Karnataka) took over the control of the satellite. In the coming days, four orbit maneuvers will be conducted from the Master Control Facility to position the satellite in geosynchronous orbit at 111.75 degrees East longitude with 30.5 degrees inclination.

IRNSS-D is the fourth of seven IRNSS satellites to be launched to provide navigational services to the region, according to the ISRO. The satellite was placed in geosynchronous orbit. Predecessors IRNSS-1A, 1B and 1C were launched by PSLV-C22, PSLV-C24 and PSLV-C26 in July 2013, April 2014 and October 2014 respectively. All the satellites are functioning satisfactorily from their designated orbital positions.

The IRNSS navigational system is regional, and targeted towards South Asia. The satellite will enable navigation, tracking and mapping services.

The next satellite, IRNSS-1E, is scheduled to be launched by PSLV. The entire IRNSS constellation of seven satellites is planned to be completed by 2016.


Photo credit: ISRO


Photo credit: ISRO