Estimation of precision formation flying using position of the spacecraft

Orbit determination is a perspective of the current and next generation observational technique. As a part of the precision formation flying need's High Accuracy Orbit Determination System (HAODS), it is required to find the position and velocity of spacecraft on the orbit. Three geocentric position vectors of a space object at a three successive times are considered. The angular positions of the observed body and their time derivatives at a given epoch are used for analysis. The improved angular observation is aided in the determination of perigee altitude and the time. It improved angular observations with traditional high accuracy in orbit determination. The results presented the initial and final position and velocity vector of the spacecraft on specified orbital elements and provide a mode for more detailed analysis of the orbital period.