EKS-4 series, which includes satellites from the United Space System, consists of several new generations of Russian long-range radar detection satellites, including US-K and US-KMO.
| Name of Satellite | EKS-4 |
| Purpose | Earth Observation |
| Contractor | RKK Energia |
| Country of Contractor | Russia |
| Class of Orbit | Elliptical |
| Perigee (km) | 1 659 |
| Date of Launch | 22.05.2020 |
| Launch Site | Plesetsk Cosmodrome |
| Launch Vehicle | Soyuz-2.1b |
| COSPAR Number | 2020-031A |
| NORAD Number | 45608 |
EKS-4 Earth Observation Satellite provides the ability to detect and track ballistic missiles, which are launched towards Russia or its allies.
