Launch Time
Mon Jan 01, 2024 03:40 UTC


Status: Active
Liftoff Thrust: 5,867 kN
Stages: 4
Strap-ons: 2
Rocket Height: 44.0 m
Fairing Diameter: 3.2 m
Fairing Height: 8.3 m

Mission Details


XPoSat (X-ray Polarimeter Satellite) is India’s first dedicated polarimetry mission to study various dynamics of bright astronomical X-ray sources in extreme conditions. The spacecraft will carry two scientific payloads in a low earth orbit. The primary payload POLIX (Polarimeter Instrument in X-rays) will measure the polarimetry parameters (degree and angle of polarization) in medium X-ray energy range of 8-30 keV photons of astronomical origin. The XSPECT (X-ray Spectroscopy and Timing) payload will give spectroscopic information in the energy range of 0.8-15 keV.

Two payloads of XPoSat are hosted on a modified IMS-2 satellite bus. Primary scientific payload is Polarimeter Instrument in X-rays (POLIX), which will study the degree and angle of polarisation of bright astronomical X-ray sources in the energy range 8-30 keV. POLIX, a 125 kg (276 lb) instrument, is being developed by the Raman Research Institute. Secondary payload is XSPECT (X-ray Spectroscopy and Timing), which will give spectroscopic information of soft X-rays in the energy range of 0.8-15 keV.

Payloads: 1
Total Mass: 469.0 kg
Low Earth Orbit

PSLV Orbital Experimental Module-3 (POEM-3)

10 attached payloads on the PSLV 4th stage will perform various experiments and testing from Indian institutions coordinated by ISRO.

Payloads: 10
Low Earth Orbit


First Launch Pad, Satish Dhawan Space Centre, India



1st orbital launch attempt

Indian Space Research Organisation

92nd mission
1st mission of 2024
77th successful mission
10th consecutive successful mission


60th mission
1st mission of 2024
57th successful mission
19th consecutive successful mission