Replaces the Nadezhda satellites as part of COSPAS-SARSAT rescue system.
The first Sterkh search-and-rescue satellite was launched at 0357 UTC on Jul 21. Russia's contribution
to the space based COSPAS-SARSAT search and rescue system used to be installed together with navigation
payloads on Nadezhda satellites, but have now been moved to the dedicated Sterkh system.
The Kosmos-3M rocket entered a transfer orbit at around 0404 UTC. It reignited at about 0500 UTC to
enter a 917 x 943 km orbit; the combined Sterkh/Parus pair separated from the final stage. Sterkh and
Parus separated from each other at around 1300 to 1430 UTC. Parus mass is around 800 kg.