The 2.1a version includes conversion from analog to digital flight control system and uprated engines on the booster and the first stage with improved injection systems. The new digital flight control and telemetry systems allow the rocket to launch from a fixed rather than angled launch platform and adjust its heading in flight. A digital control system also enables the launch of larger commercial satellites with wider and longer payload fairings such as the ST-type fairing. These fairings introduce too much aerodynamic instability for the old analog system to handle. This stage continues to use the RD-0110 engine. The 2.1a/ST version is sometimes called Soyuz ST-A.
Progress Rocket Space Centre, formerly known as TsSKB-Progress, is a space science and aerospace research company which is known for manufacturing launch vehicles and satellites. Most notably, Progress Rocket Space Centre is the manufacturer of Soyuz launch vehicles.
INFO WIKIThe Suborbital Imaging Spectrograph for Transition region Irradiance from Nearby Exoplanet host stars (SISTINE) is a payload from the University of C…
Launch contracted by the U.S. Space Force for the Rocket Systems Launch Program (RSLP), with payloads provided by the DoD Space Test Program (STP) as…
Two US national security payloads. The first is the Space Force's Wide Field of View (WFOV) Testbed satellite, the second is a multi-manifest satelli…
DS-EO is an electro-optical multispectral Earth observation satellite for DSTA from Singapore. Secondary payloads are NeuSAR and SCOOB-I, both also f…
Geostationary communications satellite
CAPSTONE (Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment) is a 12-U cubesat mission to test operations in nea…
Gaofen is a series of civilian Earth observation satellites developed and launched for the China High-definition Earth Observation System (CHEOS), a …
The X-ray Quantum Calorimeter Experiment (XQC) is a payload from the University of Wisconsin. Its objective is to measure X-rays with unprecedented p…
3 Chinese reconnaissance satellites.
Measat-3d is a Malaysian geostationary communications satellite built by Airbus Space Systems. GSAT 24 is a communications satellite of the Indian Sp…