| Name of Satellite, Alternate Names | Navstar GPS IIR-8 (Navstar SVN 56, PRN 16, USA 166) |
| Country of Operator/Owner | USA |
| Operator/Owner | DoD/US Air Force |
| Users | Military/Commercial |
| Purpose | Navigation/Global Positioning |
| Class of Orbit | MEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 20155 |
| Apogee (km) | 20344 |
| Eccentricity | 0.00355002911399538 |
| Inclination (degrees) | 55 |
| Period (minutes) | 720.71 |
| Launch Mass (kg.) | 2217 |
| Dry Mass (kg.) | 980 |
| Power (watts) | 1136 |
| Date of Launch | 29-01-2003 |
| Expected Lifetime | 10 yrs. |
| Contractor | Lockheed Martin |
| Country of Contractor | USA |
| Launch Site | Cape Canaveral |
| Launch Vehicle | Delta 2 |
| COSPAR Number | 2003-005A |
| NORAD Number | 27663 |
| Comments |