File:Poseidon.graphic.jpg

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DescriptionPoseidon.graphic.jpg	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.
Source	NASA/JPL http://topex-www.jpl.nasa.gov/technology/technology.html
Author	This file is lacking author information.

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	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	01:46, 27 May 2008		652 × 527 (66 KB)	Rsullivant (talk \| contribs)	{{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

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Usage on en.wikipedia.org
- TOPEX/Poseidon
- File talk:Poseidon.graphic.jpg
Usage on fr.wikipedia.org
- TOPEX/Poseidon
Usage on hu.wikipedia.org
- Gravitáció
Usage on id.wikipedia.org
- TOPEX/Poseidon
Usage on ko.wikipedia.org
- TOPEX/Poseidon
Usage on tr.wikipedia.org
- Topex poseidon

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