Soyuz 2.1b is a Russian launch vehicle that is part of the Soyuz family of rockets. It is designed to carry satellites and other payloads into low Earth orbit. The rocket features a three-stage design, which allows it to efficiently deliver its payload to the desired orbit. The Soyuz 2.1b variant is equipped with modernized systems, including digital flight control and improved engines. It has been used for various missions, including launching commercial satellites and resupply missions to the International Space Station. Its reliability and versatility make it a key player in space exploration and satellite deployment.