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On Sunday, May 18, 2025, the PSLV-C61/EOS-09 mission, the Indian Space Research Organization’s (ISRO) 101st launch, wasn’t successful.

Just minutes after PSLV-C61 carrying the EOS-09 earth observation satellite blasted off at 5:59 a.m. from the Satish Dhawan Space Centre in Sriharikota, the space agency said that a “observation” in the launch vehicle’s third stage prevented the mission from being completed.

The satellite was to be placed into a Sun Synchronous Polar Orbit (SSPO) by the ISRO’s PSLV rocket approximately 17 minutes after liftoff. But the mission was not successful.

Today, the PSLV-C61/EOS-09 mission was targeted from Sriharikota. The PSLV has four stages, and the performance of the second stage was quite typical. The motor for the third stage began up flawlessly, but as it was operating, we noticed something that prevented the mission from being succeeded. V. Narayanan, chairman of ISRO, stated, “We will return after analysis”.

“The 101st launch attempt was made today, and PSLV-C61 performed normally up until the second stage. The mission could not be completed due to a third-stage observation”, ISRO wrote on X.

A re-design of the EOS-04, the EOS-09 was created with the goal of increasing the frequency of observations and providing remote sensing data to the user community involved in operational applications.

According to the space agency, the spacecraft is configured utilizing ISRO’s RISAT-1 heritage bus, with the bus platform systems and the majority of the Synthetic Aperture Radar (SAR) payload’s functional needs taken from previous ISRO missions.

Carrying a SAR payload that can provide photos for a variety of ground observation applications in all weather, the satellite weighs 1696.24 kg.

The five-year mission life of the EOS-09 is intended to supply consistent and dependable remote sensing data for operational applications in a variety of sectors.

The Polar Satellite Launch Vehicle’s 63rd mission, the PSLV-C61, was also the 27th in the PSLV-XL configuration.

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