XPoSat mission: ISRO's next big thing after Chandrayaan-3 mission

tech.hindustantimes.com:

India is gearing up for another groundbreaking space mission following Chandrayaan-3 and Aditya L-1 missions. After the successful launch of these two missions, ISRO's confidence in space missions has received a major boosted.

Now, the ISRO's X-ray Polarimeter Satellite (XPoSat) is set to take the spotlight, promising to unlock the mysteries of the universe. XPoSat stands as India's first polarimetry mission and only the world's second of its kind, with NASA's Imaging X-ray Polarimetry Explorer (IXPE) being the predecessor launched in 2021.

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At its core, polarimetry is a scientific technique used to study the movement of light waves. It provides insights into the direction and patterns of vibration exhibited by light waves during their journey through space.

The launch of XPoSat is set to ride into space atop a Polar Satellite Launch Vehicle (PSLV) in a few months. Once in orbit, it's expected to serve for at least five years.

According to ISRO, the emission mechanism from various astronomical sources such as black holes, neutron stars, active galactic nuclei, and pulsar wind nebulae originate from complex physical processes and they are challenging to understand. The intricate processes involved have been elusive for researchers, and existing space observatories struggle to provide precise data on these emissions. To overcome these challenges, advanced devices and technologies, like XPoSat, have been developed to shed light on these cosmic enigmas.

XPoSat carries two crucial scientific payloads in low Earth orbit. The primary payload, POLIX (Polarimeter Instrument in X-rays), is designed to measure the polarization parameters (degree and angle) of X-rays emanating from approximately