| Name of Satellite, Alternate Names | Trumpet 3 (NROL-4, National Reconnaissance Office Launch-4, USA 136) |
| Country of Operator/Owner | USA |
| Operator/Owner | National Reconnaissance Office (NRO)/USAF |
| Users | Military |
| Purpose | Electronic Surveillance |
| Class of Orbit | Elliptical |
| Type of Orbit | Molniya |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 1210 |
| Apogee (km) | 38740 |
| Eccentricity | 0.712279369899412 |
| Inclination (degrees) | 64.7 |
| Period (minutes) | 709.61 |
| Launch Mass (kg.) | 8000 |
| Dry Mass (kg.) | |
| Power (watts) | |
| Date of Launch | 08-11-1997 |
| Expected Lifetime | |
| Contractor | Boeing Satellite Systems |
| Country of Contractor | USA |
| Launch Site | Cape Canaveral |
| Launch Vehicle | Titan IVA |
| COSPAR Number | 1997-068A |
| NORAD Number | 25034 |
| Comments | Signals intelligence; surveillance of cellular phones. |