---
title: "XPoSat: India's X-Ray Polarimeter Satellite | Model Diplomat"
description: "XPoSat is ISRO's first X-ray polarimetry satellite, launched January 2024 to measure cosmic X-ray polarisation. Key UPSC GS3 space-tech fact for aspirants."
url: "https://modeldiplomat.com/learn/glossary/xposat"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- XPoSat is India's first dedicated X-ray polarimetry satellite, launched by ISRO in January 2024 to study the polarisation of cosmic X-rays from extreme astronomical sources.
- How does XPoSat differ from AstroSat?
- What are the two payloads on XPoSat?
- How does XPoSat compare to NASA's IXPE?
- Why is X-ray polarimetry scientifically valuable?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

XPoSat is India's first dedicated X-ray polarimetry satellite, launched by ISRO in January 2024 to study the polarisation of cosmic X-rays from extreme astronomical sources.

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On 1 January 2024, ISRO launched XPoSat aboard the PSLV-C58 from Sriharikota, making India the second country after the United States to operate a dedicated X-ray polarimetry observatory in orbit.

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