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ISRO PSLV-C55/TeLEOS-2 is launched successfully today.

This is a dedicated commercial mission through NSIL with TeLEOS-2 as primary satellite and Lumelite-4 as a co-passenger satellite. The satellites weigh about 741 kg and 16 kg, respectively. Both belong to Singapore. They are intended to be launched into an Eastward low inclination orbit.


The TeLEOS-2 satellite is developed under a partnership between DSTA (representing the Government of Singapore) and ST Engineering. Once deployed and operational, it will be used to support the satellite imagery requirements of various agencies within the Government of Singapore. TeLEOS-2 carries a Synthetic Aperture Radar (SAR) payload. TeLEOS-2 will be able to provide all-weather day and night coverage, and capable of imaging at 1m full-polarimetric resolution.


The LUMELITE-4 satellite is co-developed by the Institute for Infocomm Research (I2R) of A*STAR and Satellite Technology and Research Centre (STAR) of the National University of Singapore. LUMELITE4 is an advanced 12U satellite developed for the technological demonstration of the High-Performance Space-borne VHF Data Exchange System (VDES). Using the VDES communication payload developed by I2R and STAR’s scalable satellite bus platform, it aims to augment Singapore’s e-navigation maritime safety and benefit the global shipping community.


The mission has the PSLV Orbital Experimental Module (POEM), where the spent PS4 stage of the launch vehicle would be utilized as an orbital platform to carryout scientific experiments through non-separating payloads. The payloads belong to ISRO/Department of Space, Bellatrix, Dhruva Space, and Indian Institute of Astrophysics.

The other satellite going up on the four-stage PSLV is Lumelite-4, a 35-pound (16 kg) communications demonstrator co-developed by the National University of Singapore and the nation's Agency for Science, Technology and Research.

Lumelite-4 aims to demonstrate a new data-exchange system, which is designed to "augment Singapore's e-navigation maritime safety and benefit the global shipping community," ISRO officials wrote

In addition, the PSLV's fourth stage has been modified to serve as an orbiting research platform after Saturday's primary mission comes to a close.

Seven non-deployable experimental payloads have been integrated into this "PSLV Orbital Experimental Module," or POEM. These instruments — from ISRO, the Indian Institute of Astrophysics and the Indian companies Bellatrix and Dhruva Space — are expected to operate for about a month in orbit, according to ISRO.

Saturday will mark the third time a payload-packed POEM has flown on a PSLV mission, ISRO officials said.

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