SSLV-D1/EOS-02 mission

In news– The ISRO’s Small Satellite Launch Vehicle (SSLV), carrying earth observation satellite EOS-02 and co-passenger satellites are no longer usable as they deviated from their circular orbit.

About SSLV-D1/EOS-02 mission-

After that, SSLV placed the satellites in an elliptical orbit, instead of a circular orbit, rendering them, “no longer usable.”
It was carrying EOS-02 which is an Earth observation satellite and AzaadiSAT, a student satellite.
It went on to complete all stages of the lift-off successfully until the terminal stage, which is where ISRO scientists observed the “data loss”.
Due to this malfunction, the launch vehicle put the satellites into a 365km x 76 km elliptical orbit instead of the intended 365 km circular orbit, meaning that the science objectives of the mission could not be completed.
The EOS-02 is an experimental optical remote sensing satellite with a high spatial resolution.
It is to realise and fly an experimental imaging satellite with a short turnaround time and to demonstrate launch-on-demand capability. EOS-02 belongs to the microsatellite series of spacecraft.
The AzaadiSAT is a 8U CubeSat weighing around 8 kilograms. It carries 75 different payloads each weighing around 50 grams. Girl students from rural regions across the country were provided guidance to build these payloads.
The payloads are integrated by the student team of ‘Space Kidz India’.

Previous failures-

This isn’t the first time that ISRO has faced a setback on its mission launch.
The Polar Satellite Vehicle Launch (PSLV), now considered as ISRO’s trusted workhorses, was not successful in its first flight way back on 20 September 20 1993.
ISRO first tasted defeat back on 10 August 1979, when the country’s first experimental flight of SLV-3 carrying Rohini Technology Payload could not place the satellite into its intended orbit.
ISRO witnessed of its biggest setbacks on 7 September 2019 when the Chandrayaan 2 orbiter crashed on the lunar surface instead of gently landing and was destroyed together with the rover
Later in August 2021, the launch of GISAT-1, an earth observations satellite onboard GSLV Mk 2 rocket, had failed barely 350 seconds after its launch from India’s spaceport.