地心坐标系的相关定义学习内容。包含了将经纬高转换为地心坐标系下的坐标的内容。-Geocentric coordinate system definitions related learning content. Contains the high latitude and longitude coordinates into geocentric coordinates of the content.

坐标转换软件，包括惯性坐标系和地心地固坐标系之间的相互转换-Coordinate transformation software, including conversion between inertial coordinate system and ecef