Satellites use ____ to calculate the depths of the ocean
a. variations in elevation of surface water
b. multibeam echo sounding
c. radiometrics
d. variations in ocean density
ANS: A
Satellites use radar pulses every second to determine the elevation of surface water. The distance of the
ocean surface is measured. The variations in elevation correspond with the depth in the ocean. This
method is quite accurate. Information can be found in the section Ocean Floor Is Mapped by
Bathymetry
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