Today's 2nd generation imager has 12 channels; it's a 2-tonne class spacecraft.
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Related: tonne
Prev: From ancient oak forests to centuries-old groves1 of ash or beech2, they provide a refuge for wildlife, including butterflies, birds and insects, and lock up millions of tonnes of carbon.
Next: And wherever they drift, they can have a major influence on their immediate2 environment, changing the temperature of the sea and introducing billions of tonnes of fresh water.
