Isro PSLV-C54 mission LIVE Updates: Isro's PSLV-C54 to lift off from Sriharikota shortly

With less than 15minutes left, mission director authorises initiation of automatic launch sequence for the launch of PSLV-C54.

The rocket will also carry India's first privately built earth observation satellite 'Anand' developed by Bengaluru-based Pixxel.

This a nearly two hour mission where the rocket will places all nine satellites in multiple orbits.

Countdown for PSLV-C54 carrying EOS-06, an earth observation satellite, and eight other nano satellites in progress.

The rocket is expected to lift off at 11.56am. About 17 minutes into the flight the rocket will first eject EOS-6.

According to ISRO, the EOS-6/Oceansat will provide continuity services of Oceansat-2 spacecraft with enhanced payload capabilities and application areas.

The ISRO said the satellite will ensure data continuity of ocean colour and wind vector data to sustain the operational applications. It will also improve the applications, some additional datasets such as Sea Surface Temperature and more bands in Optical region for fluorescence and in Infrared region for atmospheric corrections are accommodated.

The separation of the Earth Observation Satellite is expected to take place in orbit-1 while the passenger payloads would be separated in Orbit-2.

The mission would be one of the longest ones undertaken by the ISRO scientists who would engage the rocket to change orbits using two-orbit change thrusters (OCTs) used in the PSLV-C54 launch vehicle.

It is also the 24th flight of the PSLV-XL version.

Including the primary payload, nine satellites would ride piggy-back on the 44.4-metre high PSLV-C54 which has a lift-off mass of 321 tonne.

The primary payload of the rocket is an Oceansat which would be separated in orbit-1 while the eight other nano-satellites would be placed in different orbits based on the customer requirements (in the Sun-synchronous polar orbits).

The 25.30-hour countdown for the 56th flight of the Polar Satellite Launch Vehicle (PSLV), in its extended version (PSLV-XL), started at 10.26 AM today for the lift-off scheduled at 11.56 AM on Saturday from the first launchpad at the Satish Dhawan Space Centre, Sriharikota, 115 km from here, a source said.

ISRO begins countdown for PSLV-C54 mission