File:Earth Centered Inertial Coordinate System.png
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Summary
| Description |
English: To show a location about the earth using the Earth Centered Inertial (ECI) system, Cartesian coordinates are used. The x-y plane coincides with the earth's equatorial plane. The z axis lies at a 90° angle to the equatorial plane and extends through the North Pole. While the earth rotates, the ECI coordinate system does not. The x axis is permanently fixed in a direction relative to the celestial sphere, and the celestial sphere does not rotate like the Earth does. Due to forces exerted from the sun and moon, the earth's equatorial plane moves with respect to the celestial sphere. Since our measurements are calculated relative to satellite positions, this movement will cause error to position solutions if the ECI system were used. |
| Date | |
| Source | FAA Academy Training Manual - GPS concepts, Course 44221 |
| Author | U.S. Department of Transportation Federal Aviation Administration - Airway Facilities Division |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:57, 21 September 2011 | | 548 × 458 (104 KB) | Ploxfu |
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