| Official name | SL-4 R/B |
| Alternative name | Blok-I (Soyuz-U2) |
| Cospar ID | 1991-073B |
| Norad ID | 21747 |
| Launch date | 1991-10-17 |
| Launch site | TTMTR |
| Launch vehicle | Soyuz-U2 |
| RCS size | LARGE |
| Decay date | 1991-10-18 |
| Shape | Cyl |
| Mass (kg) | 2378.59 |
| Diameter (m) | 2.66 |
| Height (m) | 6.7 |
| Span (m^2) | 6.7 |
GMSPAZIO serves since 2005 Aerospace, Defense, and Homeland Security, with solutions focused on 4Ds (Space + Time) Synthetic Scenarios Management to help customers managing: Complex Simulation Scenarios, Space Surveillance & Tracking and Space Situational Awareness issues, Border Patrol Control Activities, Missile Defense Network Modeling, Satellite Remote Sensing Projects, and UAVs Surveillance Activities, offering Products, Services, and Training to develop Integrated and Customized Information Systems, and customers’ tailored software applications and services.
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