Latitude, longitude, altitude to earth ECI position conversion. WGS84 coordinates was used.-Latitude, longitude, altitude to earth ECI position conversion. WGS84 coordinates was used.

Convert WGS 84 (CTS, ECEF) Coordinates to ECI (CIS, Epoch J2000.0) Coordinates. This function has been vectorized for speed. The associated error in converting between coordinate frames is on the order of 1.2*10^-11 km when compared to STK ephemeris

GPS中ECEF\LLW\ECI等坐标系的转换，为matlab程序，已打包-GPS ecef,eci,llw...

航天器轨道力学 ECEF 地心地固系、东北天坐标系、ECI坐标转换 时间基准换算 轨道参数计算-Spacecraft orbital mechanics to EarthFixed ECEF system, northeast sky coordinates, ECI coordinate conversion parameter calculation time base conversion orbit

二体问题条件下，带有J2摄动的ECI状态量传播预测，-Propagate an ECI state into the future with the J2 perturbation.