YouthSat is a 92 kg Indo-Russian satellite with instruments made with student participation, launched in April 2011. It studies how changes in the Sun affect Earth's upper atmosphere.
YouthSat looks at the link between the Sun's changing activity and the thermosphere and ionosphere, the thin outer layers of the atmosphere. It carries three instruments:
ISRO calls it the second satellite of its Indian Mini Satellite series. Its solar array gives 230 W. Students from Indian universities took part at graduate, postgraduate and research level, and its Russian partner was Moscow State University. It was designed for two years.
PSLV-C16 launched YouthSat from Sriharikota on 20 April 2011, together with Resourcesat-2 and Singapore's X-SAT, into a polar sun-synchronous orbit about 822 km high.
The public satellite catalogue still carries YouthSat with an operational flag. That flag is not confirmation from ISRO that a satellite designed for two years is still working, so treat its current status as unconfirmed.