The launch of the nation’s first navigational satellite, R1A (or IRNSS-1A), has been put off by at least two weeks, to June-end.

It was set to take off on June 11/12 from the Satish Dhawan Space Centre at Sriharikota.

A faulty electro-hydraulic control actuator in the PSLV-C22 rocket’s second stage is being replaced, Indian Space Research Organisation said in a release on Saturday. In lay terms, the device relates to the movement and guidance of the rocket.

“The PSLV-C22 vehicle was fully integrated and was undergoing electrical checks. During the checks, an anomaly was observed in one of the electro-hydraulic control actuators in the second stage. It has been decided to replace this actuator, which will need two weeks of activity at the launch pad and the vehicle assembly area,” the agency said.

IRNSS-1A is the first of the seven-piece regional navigation and positioning fleet planned to be put in orbit by ISRO over the next three years.

Faulty control actuator is being replaced