EOS-08 is a 175 kg ISRO microsatellite that tests new infrared, navigation-reflection and radiation sensors. It flew on SSLV-D3, the third and final development flight of the Small Satellite Launch Vehicle, on 16 August 2024.
EOS-08 carries three payloads:
The satellite is built on ISRO's Microsat/IMS-1 bus but tests many new parts: a single avionics package handling communication, storage and positioning with 400 Gb of memory; structural panels with the battery built in; a flexible solar panel; and a nano star sensor. ISRO says these raise the bus's power by 16%, payload mass by 33% and storage twelve-fold. It weighs about 175.5 kg, uses about 420 W, and was designed for one year of operation.
SSLV-D3 launched EOS-08 from Sriharikota on 16 August 2024 into a 475 km circular orbit inclined 37.4°, along with the small SR-0 DEMOSAT. That 475 km figure is the injection orbit; the lower altitude in the quick facts, about 386–393 km, is the current value from the public satellite catalogue. ISRO said this flight completed the SSLV development project, clearing the way for Indian industry and NSIL to fly the rocket.
The public satellite catalogue still carries EOS-08 with an operational flag. EOS-08 was designed for one year of operation from August 2024, and the flag is not confirmation from ISRO that it is still working, so treat its current status as unconfirmed.