EKS-1 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-1 |
| Purpose | Earth Observation |
| Contractor | RKK Energia |
| Country of Contractor | Russia |
| Class of Orbit | Elliptical |
| Perigee (km) | 1 606 |
| Date of Launch | 17.11.2015 |
| Launch Site | Plesetsk Cosmodrome |
| Launch Vehicle | Soyuz-2.1 |
| COSPAR Number | 2015-066A |
| NORAD Number | 41032 |
EKS-1 provides the ability to detect and track ballistic missiles, which are launched towards Russia or its allies.
