| Name of Satellite, Alternate Names | SDS III-8 (Satellite Data System) NRO L-33, USA 252) |
| Country of Operator/Owner | USA |
| Operator/Owner | National Reconnaissance Office (NRO)/US Air Force |
| Users | Military |
| Purpose | Electronic Surveillance |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 35500 |
| Apogee (km) | 35500 |
| Eccentricity | 0 |
| Inclination (degrees) | 4 |
| Period (minutes) | 23 |
| Launch Mass (kg.) | |
| Dry Mass (kg.) | |
| Power (watts) | |
| Date of Launch | 22-05-2014 |
| Expected Lifetime | |
| Contractor | National Reconnaissance Laboratory |
| Country of Contractor | USA |
| Launch Site | Cape Canaveral |
| Launch Vehicle | Atlas 5 |
| COSPAR Number | 2014-027A |
| NORAD Number | 39751 |
| Comments | Real-time data relay from reconnissance satellites. |