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How has the ocean bed been measured?
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The Seasat satellite was able to measure variations in the height of the sea bed using radar. It built up a picture of the average surface level of the sea by measuring the reflection time of radar waves off the sea's surface. A surface level above average indicated a steep slope on the sea bed. | | In three months, the Seasat satellite plotted the heights of more than 50 million locations. |
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Previous:
Back
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Book:
1001
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Section:
Earth
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Chapter:
Sea
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