Function for Converting Geodetic Latitude and Longitude Coordinates to Geocentric Earth Coordinates

This function performs the conversion of geodetic latitude and longitude coordinates to Earth-centered Earth-fixed (ECEF) geocentric coordinates, enabling precise positioning and measurements in three-dimensional space. The implementation requires sophisticated mathematical and geodetic principles, utilizing various geophysical constants and parameters such as Earth's ellipsoid shape, atmospheric effects, and gravitational field influences. The function typically employs algorithms involving coordinate transformation matrices, ellipsoid parameters (semi-major axis and flattening), and trigonometric calculations for accurate spherical-to-Cartesian coordinate conversion. Development of this function demands deep expertise in geodesy and rigorous testing/validation to ensure accuracy and reliability. Before using this function, users should familiarize themselves with relevant geospatial concepts and application scenarios to better understand its functionality and significance.