Name of Satellite, Alternate Names |
Improved Trumpet 4 (NROL-22, National Reconnaissance Office Launch-22, SBIRS HEO-1, Twins 1, USA 184) |
Country of Operator/Owner |
USA |
Operator/Owner |
National Reconnaissance Office (NRO) |
Users |
Military |
Purpose |
Electronic Surveillance |
Class of Orbit |
Elliptical |
Type of Orbit |
Molniya |
Longitude of GEO (degrees) |
0 |
Perigee (km) |
1111 |
Apogee (km) |
37564 |
Eccentricity |
0.708995429349412 |
Inclination (degrees) |
63 |
Period (minutes) |
684 |
Launch Mass (kg.) |
4000 |
Dry Mass (kg.) |
|
Power (watts) |
|
Date of Launch |
28-06-2006 |
Expected Lifetime |
|
Contractor |
National Reconnaissance Laboratory |
Country of Contractor |
USA |
Launch Site |
Vandenberg AFB |
Launch Vehicle |
Delta 4 |
COSPAR Number |
2006-027A |
NORAD Number |
29249 |
Comments |
Speculation on purpose - HEO indicates possible SBIRS-HEO test payload; may also carry NASA´s TWINS-A science payload to map the Earth´s magnetosphere. |