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by zip1234
3353 days ago
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The problem is the distance involved and the orbits. For example, GeoEye-1 is in a sun-synchronous orbit in order to be over the US at the same time each day. However, it means that the satellite is moving quite rapidly across the surface of the earth much of time. If you've taken a photo of a moving person or car, you know how hard it is to get a non-blurry picture. Now, try doing that at much higher speeds. If you put a satellite into a GEO orbit, it is incredibly far away from the Earth and would require huge optics in order to get good photographs. |
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