The Indian Space Research Organisation (ISRO) said on Wednesday that it will release “PSLV-C53” carrying three satellites from Singapore on June 30. This will be the second specifically devoted commercial mission of its commercial arm, NewSpace India Limited (NSIL). At 6 p.m. IST, the launch vehicle carrying the DS-EO satellite and two more co-passenger spacecraft is planned to take off from the Second Launch Pad at the Satish Dhawan Space Centre in Sriharikota.
At 5 p.m. IST on June 29, the 25-hour countdown to launch officially starts.
The mission, which is intended to orbit the ST Electronics, Singapore-based DS-EO satellite along with two other co-passenger satellites, aims to show how the launch vehicle’s spent upper stage may be used as a stable platform for research payloads after the satellites have been separated.
This PSLV launch will be the 55th overall, the 15th to use the PSLV-Core Alone type, and the 16th from the second launch pad. The DS-EO satellite would be launched by a four-stage, 44.4 m tall PSLV-C53 with a lift-off mass of 228.433 t into an orbit with a semi-major axis of 6948.137 + 20 km, at an altitude of 570 km measured from the equator, and a low inclination of 100 + 0.20.
The three satellites are DS-EO, a 365 kg spacecraft; NeuSAR, a 155 kg satellite manufactured by Starec Initiative in the Republic of Korea; and Scoob-1, a 2.8 kg satellite from Nanyang Technological University (NTU), also in Singapore.
While NeuSAR is Singapore’s first tiny commercial satellite carrying a SAR payload, which can provide images day and night and in all weather conditions, DS-EO has an Electro-Optic, Multi-Spectral payload with a 0.5 m resolution imaging capability.
The Student Satellite Series (S3-I) satellite, developed by Singapore’s NTU School of Electrical and Electronic Engineering’s Satellite Research Centre (SaRC), is the first satellite in the series.
According to ISRO, the PS4 stage is used as an orbital platform for in-orbit scientific investigations during the PSLV Orbital Experimental Module (POEM) activities. The PS4 stage will orbit the Earth for the first time as a stabilised platform.
According to the statement, an exclusive NGC system is used to stabilise attitude; POEM gets its power from a Li-ion battery and solar panels fitted around the PS4 tank. It has dedicated control thrusters that use helium gas storage and navigates using four sun sensors, a magnetometer, a gyro, and NavIC. The telecom and features make it possible.
Two payloads from Indian space startups, M/s Digantara and M/s Dhruva Aerospace, are among the six payloads carried by POEM, which was made possible by IN-SPACe and NSIL.