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 Ikonos was launched on September 24, 1999 from Vandenberg Air Force Base, California. The owner of the satellite till the beginning of 2006 was Space Imaging (USA). In February 2006 OrbImage announced merging with Space Imaging. The united company was called GeoEye. Ikonos was set into low sun-synchronous orbit at the height of 680 km at which the satellite can revisit any area each 1-5 days depending on latitude. Ikonos provides digital satellite imagery with spatial resolution of 1 m in panchromatic mode and 4 m in multispectral mode. The main advantage of Ikonos is high mobility enabling surveying of large areas from single pass (up to 5000 square kilometers), as well as acquiring stereopairs from single orbit circuit. Perspective life time is about 7 years.
There are two accuracy levels of IKONOS stereo products: - Standard Stereo — 12 m horizontal (RMSE) and 22 m vertical (LE90) accuracy;
- Precision Stereo — 2 mhorizontal (RMSE) and 5 mvertical (LE90) accuracy.
Basic characteristics: | Mode: | Panchromatic | Multispectral | | Spectral bands (mkm): | 0,445-0,90 | blue: 0.45-0.52 green: 0.52-0.61 red: 0.64-0.72near IR: 0.77-0.88 | | Spatial resolution at nadir: | 1 m | 4 m | | Maximum off-nadir angle: | 45° | | Swatch Width: | 11 km | | Metric accuracy: | CE90=23 m | | Radiometric resolution: | 8-11 bits per pixel | | Revisit time: | 1-5 days (depending on altitude) | | Stereo imagery: | Available from a single pass |
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