ISRO’s PSLV-C53 to launch 3 Singapore satellites on June 30 from Sriharikota

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The Indian Space Research Organization (ISRO) announced on Wednesday that it will launch – the second dedicated commercial mission of its commercial arm NewSpace India Limited (NSIL) – ‘PSLV-C53’ carrying three satellites from Singapore on June 30.

The launch vehicle carrying the DS-EO satellite along with two other co-passenger satellites is scheduled to lift off at 6 p.m. IST from the second launch pad at the Satish Dhawan Space Center in Sriharikota.

The 25-hour countdown to launch begins at 5 p.m. IST on June 29.

The mission, which is designed to orbit the DS-EO satellite with two other co-passenger satellites from ST Electronics, Singapore, proposes to demonstrate the use of the launch vehicle’s upper stage as a stabilized platform for science payloads after separation of satellites.

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This will be the 55th PSLV mission and the 15th mission using the PSLV-Core Alone variant, and the 16th launch of the PSLV from the second launch pad.

A 44.4 m tall four-stage PSLV-C53 has a take-off weight of 228.433 t and would inject the DS-EO satellite into an orbit with a semi-major axis of 6948.137 + 20 km, at an altitude of 570 km measured from the equator, with a slight inclination of 100+ 0.20.

The three satellites are- DS-EO, a 365kg and NeuSAR, a 155kg satellite both owned by Singapore and built by Starec Initiative, Republic of Korea, and the third satellite is a 2.8kg Scoob-1 of Nanyang Technological University (NTU), Singapore.

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DS-EO carries an electro-optical multi-spectral payload with 0.5m resolution imaging capability, while NeuSAR is Singapore’s first small commercial satellite carrying a SAR payload, capable of providing daytime imagery like at night and in all weather conditions.

The SCOOB-I satellite is the first satellite in the Student Satellite Series (S3-I), a hands-on student training program at the Satellite Research Center (SaRC) of the NTU School of Electrical and Electronic Engineering in Singapore.

The PSLV Orbital Experimental Module (POEM) activity performs science experiments in orbit using the worn-out PS4 stage as an orbital platform, ISRO said, this is the first time the PS4 stage will orbit the Earth as a stabilized platform.

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Attitude stabilization is achieved using a dedicated NGC system, he said, POEM draws power from solar panels mounted around the PS4 tank and a Li Ion battery.

It navigates using four solar sensors, a magnetometer, gyroscopes and NavICs, and carries dedicated control thrusters using helium gas storage. It is activated with the remote control function.

POEM carries six payloads, including two from Indian space start-ups M/s Digantara and M/s Dhruva Aerospace, activated via IN-SPACe and NSIL.


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