Image:Poseidon.graphic.jpg
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[edit] Summary
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The accurate determination of the ocean height is made by first characterizing the precise height of the spacecraft above the center of the Earth. This is achieved through a technique called "precise orbit determination," of which satellite-tracking information is the most important ingredient.The second component of the ocean height measurement is the range from TOPEX/Poseidon to the ocean surface. TOPEX/Poseidon carried two radar altimeters for providing this information. To take a measurement, an onboard altimeter bounces microwave pulses off the ocean surface and measures the time it takes the pulses to return to the spacecraft. |
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NASA/JPL http://topex-www.jpl.nasa.gov/technology/technology.html |
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[edit] Licensing:
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This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).
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| Date/Time | Dimensions | User | Comment | |
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| current | 01:46, 27 May 2008 | 652×527 (66 KB) | Rsullivant | ({{Information |Description =The accurate determination of the ocean height is made by first characterizing the precise height of the spacecraft above the center of the Earth. This is achieved through a technique called "precise orbit determination," of wh) |
