...Another advantage of GeoEye-1 comes from the orbit performance. With an orbit velocity of 7.5 km/sec, orbiting at an altitude of 681 kilometers, it has a repeat frequency of approximately three days. This means it is ideal for many types of change detection analysis. For example, monitoring extreme flood conditions such as those currently being experienced in Queensland, Australia, is just one potential benefit of this satellite's revisit frequency. Imagery from this ultra-high resolution satellite can be acquired at regular intervals to help rescuers identify escape routes, assess areas of highest damage and monitor the changing flood conditions. This is exactly what was done during the Haitian earthquake disaster which took place last year. GeoEye-1 imagery was used to assess areas that suffered the most damage in order to more effectively target the rescue efforts...
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