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Earth Orientation Parameters

Calculate Earth orientation parameters (EOP)

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  • Library:

  • 航空空间/ Environment / Celestial Phenomena

  • Earth Orientation Parameters block

描述

TheEarth Orientation Parameters块计算这些参数：

  • Difference between the UTC and Universal Time (UT1)

  • 米ovement of the rotation axis with respect to the crust of the Earth

  • Adjustment to the location of the Celestial Intermediate Pole (CIP)

By default, this block uses a prepopulated list of International Earth Rotation and Reference Systems Service (IERS) data. This list contains measured and calculated (predicted) data supplied by the IERS. The IERS measures and calculates this data for a set of predetermined dates. For dates after those listed in the prepopulated list,Earth Orientation Parameters使用此方程计算ΔUT1，将值限制为+/- 0.9 s：

UT1-UTC=0.5309-0.00123(MJD-57808)-(UT2-UT1)

Use this block when your application uses Earth Centered Inertial to Earth Centered Earth Fixed transformations, such as for high altitude applications.

端口

输入

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UT1 for UTC, specified as a scalar modified Julian date. Use the朱利安日期转换将UTC日期转换为修改后的朱利安日期的块。

Data Types:double

Output

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Difference between UT1 and UTC, specified as a scalar, in seconds.

Data Types:double

地球的极性位移，[xp,yp], specified as a vector, in radians, from the motion of the Earth crust, along thex- 和y- 轴。

Data Types:double

调整在弧度中指定为载体的天体中间极（CIP）的位置。这个位置（[DX，dY]）x- 和y- 轴。

Data Types:double

Return errors for the measured and predicted values in the IERS data for the difference between UT1 and UTC, specified as a vector, in seconds.

Dependencies

This port is enabled when the输出参数错误被选中。

IERS数据中测量和预测值的返回错误，用于弧度的地球极性位移（指定为矢量）。

Dependencies

This port is enabled when the输出参数错误被选中。

Return errors for the measured and predicted values in the IERS data for the adjustment to location of Celestial Intermediate Pole (CIP), specified as a vector, in radians.

Dependencies

This port is enabled when the输出参数错误被选中。

Parameters

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Custom list of Earth orientation data, specified in a MAT-file.

Programmatic Use

Block Parameter:FileName
类型: character vector
Values: scalar
默认:'aeroiersdata.mat'

选择此参数以使输出端口能够返回IERS数据文件中测量值和预测值的错误：

  • Difference between UT1 and UTC

  • 地球极地的位移

  • Adjustment to location of Celestial Intermediate Pole (CIP)

Dependencies

Selecting this check box enables these ports:

  • ΔUT1呃

  • [XP，YP]呃

  • (dX, dY)呃

Programmatic Use

Block Parameter:Outputerror
类型: character vector
Values: scalar
默认:'离开'

Out-of-range block behavior, specified as follows.

Action 描述

没有任何

没有行动。

警告

警告Matlab®命令窗口，模型模拟继续。

错误(default)

米ATLAB returns an exception, model simulation stops.

Programmatic Use

Block Parameter:action
类型: character vector
Values:'None'|'Warning'|'错误'
默认:'Warning'

Web site or Earth orientation data file containing the Earth orientation data according to the IAU 2000A, specified as a web site address or file name.

Note

If you receive an error message while accessing the default site, use one of these alternate sites:

  • https://datacenter.iers.org/data/latestversion/10_finals.data_iau2000_v2013_0110.txt

  • ftp://cddis.gsfc.nasa.gov/pub/products/iers/finals2000A.data

Programmatic Use

Block Parameter:FileName
类型: character vector
Values: scalar
默认:'aeroiersdata.mat'

Folder for IERS data file, specified as a character array or string. Before running this function, create文件夹名称with write permission.

To create the IERS data file in the destination folder, click the创造按钮。

Programmatic Use

Block Parameter:FileName
类型: character vector
Values: scalar
默认:'aeroiersdata.mat'

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2018b

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R2020b中的行为发生了变化

See Also

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