IKONOS overview. First commercial sub-meter Earth-observation satellite — a landmark.

• Operator / launch: Space Imaging, September 1999 (active to March 2015).
• Orbit: sun-synchronous, 10:30 AM equator crossing.
• Altitude: 682 km.
• Ground-track repeat: 11 days.
• Nadir swath / scene: 11 km × 11 km.