name: WGS-84
full_form: World Geodetic System 1984
context: error mean and variance along the line-of-sight vector between the satellite and the user, according to the following formula: stdDevorbit = (Equation 8.1.2.1.21-1) meanorbit = where: I: 3-D line of sight vector from the user to the satellite in the WGS-84 ECEF coordinate frame. R: the rotation matrix from satellite along-track (AT), cross-track (CT) and radial (RA) coordinates into the WGS-84 ECEF coordinate frame. RT denotes the transposed matrix. v: the 3-D Orbit error variance vector expressed in satellite along-track, cross-track and radial coordinates. : the Mean Orbit Error vector expressed in satellite along-track, cross-track and radial coordinates. The vector v is expressed in the SSR Orbit Corrections as the three elements in the Variance Orbit Residual Error Vector.
description: The World Geodetic System 1984 (WGS-84) is a global coordinate system used for mapping and navigation. In telecommunications, it defines the reference frame for calculating satellite orbit corrections, ensuring accurate positioning data.
explanation: WGS-84 is classified as a Geodetic Reference System because it provides a standardized framework for defining locations on Earth, which is crucial for various telecommunication applications like GPS and satellite communication.
section_title: 8.1.2.1.21SSR Orbit Corrections
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