LLA to ECEF Position
The transition from the geodetic coordinate system to the Greenwich coordinate system.
blockType: SubSystem
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Path in the library: |
Description
Block LLA to ECEF Position implements the transition from the geodetic coordinate system to the Greenwich rectangular coordinate system according to the formulas:
Where
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— radius of curvature of the first vertical;
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— the semi-major axis of the ellipsoid;
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— eccentricity;
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— ellipsoid compression.
An ellipsoid of rotation is used as an approximation to the actual shape of the planet. To use a spherical planet model, set the value of the Flattening parameter to zero.
The Greenwich coordinate system is associated with a rotating planet. The origin of coordinates is in the center of mass of the planet. Axis It is directed to the intersection point of the Greenwich meridian with the equator, the axis coincides with the axis of rotation of the planet and is directed to the North Pole, the axis complements the system to the right.
Ports
Parameters
Planet model — Planet
Earth (WGS84) (by default) | Custom
Geodesic parameters of the planet. The WGS 84 system is used for the Earth.
Dependencies
The Flattening and Equatorial radius of planet parameters are available only when the Custom option is selected.
Flattening — compression
1/298.257223563 (by default) | scalar
Compression of the ellipsoid of the planet.
Dependencies
To use this parameter, set the Planet model parameter to Custom.
Equatorial radius of planet — equatorial radius of planet
6378137.0 (by default) | scalar
The equatorial radius of the planet. It is set in the same units of measurement as the signal at the input of port h.
Dependencies
To use this parameter, set the Planet model parameter to Custom.